Expand
Contents
- The climate of Rockland
- The best time to visit Rockland
- The worst time to visit Rockland
- Spring weather in Rockland
- Summer weather in Rockland
- Autumn weather in Rockland
- Winter weather in Rockland
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
A US flag flying outside a lighthouse on the water in Rockland, Maine
The climate of Rockland
Geographically positioned in the state of Maine in the northeastern US, Rockland lies within a climate zone classified as Dfb according to the Köppen climate classification. This designates a humid continental climate, with no dry season and warm summers. Going further into analyzing the weather parameter data, it becomes clear that Rockland experiences significant seasonal variation.
Throughout the year, the highest temperatures reach around 68.7°F (20.4°C) in July and August, while the lowest temperatures occur in January and February with an average low of 22.1°F (-5.5°C). Temperature changes are evidently dramatic, demonstrating a sweeping range from 22.1°F (-5.5°C) to 68.7°F (20.4°C).
The humidity averages 78% in winter and increases slightly to 85% in the summer months - July and August specifically. Rainfall generally varies over the year; December records the maximum amount of rainfall at 3.35" (85mm), while January and March see a relatively low amount with about 2.24" (57mm). The most rainfall tends to occur over 15.8 days in April and 15.3 days in May.
Studying snowfall data helps develop an understanding of Rockland's long, snowy winter. The city records snowfall in the range of 1.1" (28mm) to 2.83" (72mm) from November through April, and the highest snowfall occurs typically between December and February.
Another key parameter worth noting is wind speed. The yearly average fluctuates from 8.2mph (13.2km/h) in July and August to 14.9mph (24km/h) in January, with the highest gusts occurring in January at 21.9mph (35.2km/h).
Throughout the year, the highest temperatures reach around 68.7°F (20.4°C) in July and August, while the lowest temperatures occur in January and February with an average low of 22.1°F (-5.5°C). Temperature changes are evidently dramatic, demonstrating a sweeping range from 22.1°F (-5.5°C) to 68.7°F (20.4°C).
The humidity averages 78% in winter and increases slightly to 85% in the summer months - July and August specifically. Rainfall generally varies over the year; December records the maximum amount of rainfall at 3.35" (85mm), while January and March see a relatively low amount with about 2.24" (57mm). The most rainfall tends to occur over 15.8 days in April and 15.3 days in May.
Studying snowfall data helps develop an understanding of Rockland's long, snowy winter. The city records snowfall in the range of 1.1" (28mm) to 2.83" (72mm) from November through April, and the highest snowfall occurs typically between December and February.
Another key parameter worth noting is wind speed. The yearly average fluctuates from 8.2mph (13.2km/h) in July and August to 14.9mph (24km/h) in January, with the highest gusts occurring in January at 21.9mph (35.2km/h).
The best time to visit Rockland
Although largely contingent upon individual temperature preferences and planned activities, the optimal time to visit Rockland for general outdoor activities is from June to September. During these summer months, the average high temperatures fluctuate from 61.2°F (16.2°C) to 68.7°F (20.4°C), with relatively lower rainfall rates and longer daylight periods. Furthermore, these months offer the most ample sunshine hours, suitable for outdoor exploration and beach visits, with sea temperatures reaching a comfortable 58.5°F (14.7°C) to 60.4°F (15.8°C).
The worst time to visit Rockland
Considering the temperature, wind, and snowfall data, the less desirable months for visitors are likely to be from November to March. These months often see temperatures plunge to as low as 22.1°F (-5.5°C), accompanied by snowfall up to 2.83" (72mm). The colder weather and greater snowfall could limit outdoor activities and consequently impede the overall visiting experience.
Spring weather in Rockland
Marked by a gradual rise in temperature, increasing rainfall, and longer daylight hours, the spring season from March to May in Rockland experiences temperature highs from 37.6°F (3.1°C) to 54.1°F (12.3°C) and lows from 28.8°F (-1.8°C) up to 46.2°F (7.9°C). Rainfall totals approximately 2.99" (76mm) in April and drops back down to 2.36" (60mm) by May.
Summer weather in Rockland
The warmest months of the year from June through August offer the most conducive outing conditions in Rockland, with average high temperatures soaring up to a comfortable 68.7°F (20.4°C) and the minimum temperatures held relatively high at 60.3°F (15.7°C). The summer months receive less rainfall, dropping below 2" (51mm), and the longest daylight hours, up to 15.5 hours in June.
Autumn weather in Rockland
During the months of September through November, Rockland experiences a significant drop in temperatures, sliding to as low as 37.4°F (3°C) and averaging at highs of 63.3°F (17.4°C) in September to 45.5°F (7.5°C) by November. Rainfall increases to its highest levels in the year, up to 3.27" (83mm) in October, marking a potential decrease in outdoor ventures.
Winter weather in Rockland
Winter in Rockland, from December through February, is characterized by the lowest temperatures of the year, a high of 32.7°F (0.4°C) and a low of 22.1°F (-5.5°C), along with considerable snowfall between 2.52" (64mm) to 2.83" (72mm). The reduced daylight hours of 8.9 to 9.3 hours accompanied by lower sunshine duration make it the chilliest season, making it a less favored time for visitors. However, it can still be an attractive time for enthusiasts of winter sports or those who enjoy the scenic beauty of snow-covered landscapes.
Weather in January
January in Rockland, Maine sees the coldest temperatures of the year with the monthly average high and low temperatures ranging from 22.1°F (-5.5°C) to 31.8°F (-0.1°C). The month also brings a considerable amount of cloud cover, resulting in decreased sunlight. Weather in January »
Weather in February
Temperatures in February rise slightly, offering a small respite from the chilling weather of January. Longer hours of daylight are a notable change, providing opportunities for outdoor activities in the cold but primarily clear weather. Weather in February »
Weather in March
March sees the onset of spring, with temperatures starting to climb to a maximum of 37.6°F (3.1°C). With the rise in temperature, snowfall is also gradually replaced by rainfall, marking the change of seasons. Cloud cover decreases slightly, allowing more sunshine to reach the ground. Weather in March »
Weather in April
In April, Rockland, Maine experiences more drastic temperature changes with the upper limit jumping to 45.9°F (7.7°C). This is accompanied by an increase in rainfall, with precipitation escalating to 2.99" (76mm) for the month. Weather in April »
Weather in May
Weather in Maine continues to get warmer in May, with the lower limit temperature climbing to 46.2°F (7.9°C). The amount of rainfall slightly decreases, bringing more dry periods to the region. Simultaneously, the number of sunny days continues to grow. Weather in May »
Weather in June
June is the first month of summer in Rockland, Maine, and the temperature rises again, now reaching up to 61.2°F (16.2°C). This month rocks the highest UV index, so sun protection becomes crucial while outdoors. However, the sea temperature remains comparatively low, not surpassing 52°F (11.1°C). Weather in June »
Weather in July
July is the hottest month in Rockland, Maine, with the average high temperature reaching a peak of 67.8°F (19.9°C). Along with the temperature, the relative humidity also reaches its yearly high at 85%. While the temperatures soar, rainfall decreases to its lowest annual level of 1.85" (47mm). Weather in July »
Weather in August
August maintains similar weather conditions to July, with exceptionally high temperatures and low rainfall. Although the temperatures dip slightly from the July high, it remains generally hot throughout the month. The sea temperature reaches its yearly zenith, hitting 60.4°F (15.8°C). Weather in August »
Weather in September
September in Rockland, Maine signals the onset of fall, with temperatures decreasing to 63.3°F (17.4°C). The number of rainy days drops while the daylight hours gradually reduce. However, the weather remains pleasant for outdoor activities. Weather in September »
Weather in October
October witnesses a further drop in temperature, falling to an average high of 55°F (12.8°C). Rainfall increases significantly to 3.27" (83mm), marking one of the wettest months of the year. Concurrently, daylight hours and sunshine reduce notably, implying shorter and generally overcast days. Weather in October »
Weather in November
November in Rockland, Maine comes with a distinct decrease in temperature, dropping to an average high of 45.5°F (7.5°C). The number of rainy days falls, but snow begins to cover the ground again, hinting at the approaching winter. Weather in November »
Weather in December
December, in Rockland, Maine, indicates the full onset of winter with temperatures plunging to 37°F (2.8°C). The number of rainy days and rainfall height rises to 3.35" (85mm), making it the month with the highest precipitation. Weather in December »
Updated: Aug 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
January is the coldest month, with the temperature often reaching an average high of 31.8°F (-0.1°C) and an average low of 22.1°F (-5.5°C).
How many days does it rain?
Throughout the year, there are 144.8 rainfall days, and 30.63" (778mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, November and December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 8.5 days and typically aggregates up to 2.83" (72mm) of snow.
How many days does it snow in Rockland?
In Rockland, during the entire year, snow falls for 33.1 days and aggregates up to 12.36" (314mm) of snow.
When is the lowest UV index?
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
What month is the ocean coldest?
The month with the coldest seawater is March, with an average ocean temperature of 37.9°F (3.3°C).
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
When it does not snow?
May through October are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 24min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 5, are months with the highest UV index.
What is the most humid month?
The most humid month is July, with an average relative humidity of 85%.
What are the warmest months?
August stands out as Rockland's warmest month, with temperatures ranging between an average high of 68.7°F (20.4°C) and a low of 60.6°F (15.9°C).
When is the ocean warmest?
With an average ocean temperature of 60.4°F (15.8°C), August is the month with the warmest seawater.
What month has the most sunshine?
August has the most sunshine of the year, with an average of 10.5h of sunshine.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 10.4 days and typically collects 1.81" (46mm) of precipitation.
What is the least humid month?
November is the least humid month, with an average relative humidity of 75%.
What is the rainiest month?
The month with the most rainfall is December, when the rain falls for 11.3 days and typically aggregates up to 3.35" (85mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 8h and 54min of daylight.
What is the month with the least sunshine?
December has the least sunshine of the year, with an average of 4.5h of sunshine.
Average temperature
Rockland, ME
The warmest month (with the highest average high temperature) is August (68.7°F).
The month with the lowest average high temperature is January (31.8°F).
The month with the highest average low temperature is August (60.6°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure
Rockland, ME
- Average pressure in January:
29.96"Hg - Average pressure in February:
29.95"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Rockland, ME
- Average wind speed in January:
14.9mph - Average wind speed in February:
14.6mph - Average wind speed in March:
14.4mph - Average wind speed in April:
12.2mph - Average wind speed in May:
10mph - Average wind speed in June:
9.3mph
- Average wind speed in July:
8.2mph - Average wind speed in August:
8.2mph - Average wind speed in September:
9.6mph - Average wind speed in October:
12.1mph - Average wind speed in November:
13.5mph - Average wind speed in December:
14.4mph
The windiest month (with the highest average wind speed) is January (14.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.2mph).
Average humidity
Rockland, ME
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (75%).
Average rainfall
Rockland, ME
- Average rainfall in January:
2.6" - Average rainfall in February:
2.32" - Average rainfall in March:
2.24" - Average rainfall in April:
2.99" - Average rainfall in May:
2.36" - Average rainfall in June:
2.76"
- Average rainfall in July:
1.85" - Average rainfall in August:
1.97" - Average rainfall in September:
1.81" - Average rainfall in October:
3.27" - Average rainfall in November:
3.11" - Average rainfall in December:
3.35"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days
Rockland, ME
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
11.2 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
14.1 days - Average rainfall days in August:
12.1 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
13.3 days - Average rainfall days in November:
11.3 days - Average rainfall days in December:
11.3 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall
Rockland, ME
The month with the highest snowfall is January (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Rockland, ME
- Average snowfall days in January:
8.5 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
2 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
6.5 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature
Rockland, ME
The best month for swimming (with the highest average sea temperature) is August (60.4°F).
The coldest month (with the lowest average sea temperature) is March (37.8°F).
Average daylight / Average sunshine
Rockland, ME
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
4h and 4min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 1min - Average sunshine in June:
8h and 5min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 3min - Average sunshine in September:
8h and 3min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days
Rockland, ME
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
13.4 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
13.8 days - Average sunshine days in June:
14 days
- Average sunshine days in July:
14.9 days - Average sunshine days in August:
16.9 days - Average sunshine days in September:
18 days - Average sunshine days in October:
15.6 days - Average sunshine days in November:
15.8 days - Average sunshine days in December:
12.3 days
The month with the most sunshine days is September (18 days).
The month with the least sunshine days is April (11.5 days).
Average UV index
Rockland, ME
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Rockland, ME
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility
Rockland, ME
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Rockland, Maine, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location