Yearly & Monthly weather

The climate of Bangor
The Best Time to Visit Bangor
The Worst Time to Visit Bangor
Spring Weather in Bangor
Summer Weather in Bangor
Autumn Weather in Bangor
Winter Weather in Bangor
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 daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

The neon-lit city of Bangor, Maine, at night with the clear sky and neon lights reflected in the water below

The climate of Bangor

Geographically situated in Maine, USA, Bangor's climate is identified under the Köppen Climate Classification as Dfb, characterizing it as a Humid continental zone with no dry season and warm summer. Similar to other regions belonging to this classification, climates are typified by significant variations in temperature on both daily and seasonal scales due to the long, warm, humid summers as opposed to the harsh winters.

The town of Bangor experiences temperature variances from 13.6°F (-10.2°C) to 77.2°F (25.1°C) over the course of the year. It indicates the presence of a sizable disparity between the coldest and warmest months. Noticeable fluctuations in Bangor's humidity levels are minimal across the year, hovering between 77% and 85%. Rainfall here is relatively consistent, varying between 1.61" (41mm) in the least rainy month to 3.27" (83mm) in the most rainfall-intensive month. Residents and visitors alike should be prepared for some precipitation, regardless of the season.

A unique feature of Bangor's weather is the snowfall that dazzles the local landscape with as much as 8.43" (214mm) in January, and surprisingly, still persists till April but dwindles down to almost no flakes from May onwards. When it comes to sun exposure, the median duration changes noticeably throughout the year: the shortest average daylight length is 8.9 hours in December while the longest reaches up to 15.5 hours in June. Reflecting these daylight changes, the town's daily sunshine varies from a low of 4.4 hours in December to a high of 9.9 hours in August.

The Best Time to Visit Bangor

Taking into consideration factors such as temperature, humidity, rainfall, and sunshine, the best time to visit Bangor is typically from late spring to early summer (May to June). The weather is welcomingly warm with average highs swinging between 62.4°F (16.9°C) to 69.8°F (21°C). Rainfall is comparatively lower with values around 2.4" (61mm) to 2.56" (65mm) during this period. Sunshine reaches its zenith at this time of the year with a daily average of 7.9 hours to 8.6 hours promoting outdoor and recreational activities.

The Worst Time to Visit Bangor

The more challenging time to visit Bangor would conventionally fall between the months of January and February. With an average high temperature barely rising to 28.8°F (-1.8°C) in February and lows even dipping to 13.6°F (-10.2°C) in January, these months mark the peak of Bangor’s cold season. Conditions are amplified with an average snowfall of 8.43" (214mm) in January and persistent cloud cover, limiting the daily sunshine to a mere 4.6 hours in January.

Spring Weather in Bangor

With the arrival of spring, Bangor’s weather shifts towards slightly milder conditions. Gradual warming can be observed between March and May with average temperature highs increasing from 36.7°F (2.6°C) to 62.4°F (16.9°C) and lows range from 22.3°F (-5.4°C) to 43.3°F (6.3°C). Spring brings with it more precipitation, especially during April with an average rainfall of 3.23" (82mm). However, the area’s natural beauty shines as daylight length increases and there is more than 7 hours of daily sunshine by May.

Summer Weather in Bangor

Summers in Bangor from June to August are generally warm and welcoming. Reflected by the high temperatures reaching 77.2°F (25.1°C) in July and only falling to around a minimum of 50.2°F (10.1°C) at night in June. This period experiences the lowest rainfall of the year with July recording an average of 1.61" (41mm). Visitors to Bangor can savor long daylight hours that span up to 15.5 hours and more than 9.6 hours of sunshine per day from July to August.

Autumn Weather in Bangor

During the autumn months of September to November, the temperatures in Bangor gradually cool down from the warmth of the summer. Daytime highs slide from 68.9°F (20.5°C) in September to a cooler 43.3°F (6.3°C) by November. Night-time temperatures correspondingly drop from 50°F (10°C) in September to a chillier 30.9°F (-0.6°C) in November. Despite these declines, rainfall is fairly consistent, peaking at 2.95" (75mm) in October. With daylight hours decreasing and daily sunshine hovering between 6.2 hours to 4.9 hours, autumn paints Bangor with a beautiful spectrum of colours.

Winter Weather in Bangor

Winter in Bangor, from December through February, is characterized by a stark drop in temperatures. Highs dwindle down to a mere 32.4°F (0.2°C) in December, while nighttime lows can plunge to 13.6°F (-10.2°C) during the peak of winter in January. Snowfall predominates with an impressive 8.43" (214mm) measured in January, turning Bangor into a stunning winter wonderland. Despite shorter daylight hours, reaching 8.9 hours in December, the low sun shines for about 4.4 hours daily, adding a twinkling sparkle to the snow-covered surfaces.

Weather in January

Moving into January, in Bangor, Maine, the city experiences an average high temperature of 26.6°F (-3°C) and low of 13.6°F (-10.2°C), a clear indication of winter peaks. The skies remain quite cloudy with approximately 51% cloud coverage, adding to the overall chilling atmosphere. Weather in January »

Weather in February

February continues with the cold trend of January, yet with margianal changes in temperatures and other elements. The snowfall decreases to 7.48" (190mm) over a duration of 13.5 days on average, a slight relief from the January chills. Weather in February »

Weather in March

Moving on from the frosty atmosphere of February, Bangor shows early signs of warming in March. However, it sustains its snowy characteristics with 4.72" (120mm) of snowfall across 12.3 days, still being considerable but lesser than the previous two months. Weather in March »

Weather in April

With Bangor stepping into April, the significant changes shake the standard weather yards of the city. The snowfall plummets from 4.72" (120mm) in March to a mere 0.55" (14mm), signaling the close of snowfall season. The residents now find the outside temperatures fluctuating between 50°F (10°C) high and 33.6°F (0.9°C) low, setting the stage for the arrival of spring. Weather in April »

Weather in May

May carries forward the pleasant vibes of April, introducing a comforting warmth to Bangor, Maine. Although the city records a high temperature of 62.4°F (16.9°C) and an adequate amount of rainfall, it does not deter the outdoor activities. Weather in May »

Weather in June

June marks the positive ascension of temperature charts exhibiting the official onset of summer in Bangor. A comfortable average high temperature of 69.8°F (21°C) combined with an abundant 15.5 hours of daylight implies the city's longest and warmest days. Weather in June »

Weather in July

July exhibits the towering phase of summer's warmth marking it as the hottest month in Bangor with average high temperatures soaring to a 77.2°F (25.1°C) peak. The high UV index indicates the necessity of sun protection while venturing out. Weather in July »

Weather in August

Transitioning from the peak summers of July, the city of Bangor, Maine starts cooling down in August. The city experiences an average high temperature of 76.6°F (24.8°C), manifesting a slight dip from the July peak. However, clear skies and low cloud percentage of 38 maintain the warmth and brightness of this month. Weather in August »

Weather in September

September witnesses Bangor making strides towards autumn from the dissipating summer. Its average high temperature of 68.9°F (20.5°C) signals the onset of cooling trends post the warm summers. As the city embraces the fall season, deciduous trees hence start adopting hues of orange and yellow. Weather in September »

Weather in October

October in Bangor is characterized by the full bloom of autumn, tipping off cooler temperatures and falling leaves. The chilly winds pick up speed averaging around 7mph (11.3km/h), while the high temperature dips to a cool 55.8°F (13.2°C). Weather in October »

Weather in November

Bangor, Maine steps into November noticing a sudden drop in temperatures and the swift arrival of winter chills. The town experiences an average temperature low of 30.9°F (-0.6°C), nearing the freezing point and hinting at yet another snowy winter ahead. Weather in November »

Weather in December

Come December, the city of Bangor, Maine is fully engrossed into the harsh and nerve-chilling winter season. Snowfall spikes up, with a whopping 5.75" (146mm) of snow typically blanketing the town across 10.3 days on average. The shortened daylight of 8.9 hours and a high temperature not exceeding 32.4°F (0.2°C) adds to the cold, wintry feel of this month. Weather in December »

Updated: Aug 7, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

January, known for its average high temperature of 26.6°F (-3°C) and an average low temperature of 13.6°F (-10.2°C), is the coldest month.

How many days does it rain?

Throughout the year, in Bangor, there are 148.5 rainfall days, and 29.8" (757mm) of precipitation is accumulated.

When does it snow?

Months with snowfall are January through May, October through December.

When does it snow the most?

The month with the most snowfall is January, when snow falls for 13.2 days and typically aggregates up to 8.43" (214mm) of snow.

How much does it snow?

In Bangor, during the entire year, snow falls for 58 days and aggregates up to 34.09" (866mm) of snow.

What is the month with the lowest UV index?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the most humid month?

February is the most humid month, with an average relative humidity of 85%.

What is the month with the least sunshine?

February has the least sunshine of the year, with an average of 4h of sunshine.

When is Daylight Saving Time (DST) in Bangor?

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.

What is the least humid month?

The months with the lowest humidity are April and May, with an average relative humidity of 77%.

When it does not snow?

In Bangor, Maine, snow does not fall in June through September.

When are the longest days?

With an average of 15h and 30min of daylight, June has the longest days of the year.

What are the months with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 5.

What time of the year is the hottest in Bangor?

The highest temperatures in Bangor are recorded in July, with averages reaching a high of 77.2°F (25.1°C) and a low of 57°F (13.9°C).

What is the driest month?

The month with the least rainfall is July, when the rain falls for 13.6 days and typically collects 1.61" (41mm) of precipitation.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 9.9h of sunshine.

What is the wettest month?

December is the month with the most rainfall. Rain falls for 11 days and accumulates 3.27" (83mm) 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.

Average temperature
Bangor, ME

Average high temperature in January:
26.6°F
Average high temperature in February:
28.8°F
Average high temperature in March:
36.7°F
Average high temperature in April:
50°F
Average high temperature in May:
62.4°F
Average high temperature in June:
69.8°F

Average high temperature in July:
77.2°F
Average high temperature in August:
76.6°F
Average high temperature in September:
68.9°F
Average high temperature in October:
55.8°F
Average high temperature in November:
43.3°F
Average high temperature in December:
32.4°F

The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (26.6°F).

Average low temperature in January:
13.6°F
Average low temperature in February:
14.9°F
Average low temperature in March:
22.3°F
Average low temperature in April:
33.6°F
Average low temperature in May:
43.3°F
Average low temperature in June:
50.2°F

Average low temperature in July:
57°F
Average low temperature in August:
56.1°F
Average low temperature in September:
50°F
Average low temperature in October:
41.9°F
Average low temperature in November:
30.9°F
Average low temperature in December:
21.9°F

The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).

Average pressure
Bangor, ME

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
Bangor, ME

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity
Bangor, ME

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April and May (77%).

Average rainfall
Bangor, ME

The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is July (1.61").

Average rainfall days
Bangor, ME

Average rainfall days in January:
8.1 days
Average rainfall days in February:
8.3 days
Average rainfall days in March:
10.9 days
Average rainfall days in April:
15.8 days
Average rainfall days in May:
16.7 days
Average rainfall days in June:
15.8 days

Average rainfall days in July:
13.6 days
Average rainfall days in August:
13.6 days
Average rainfall days in September:
10.5 days
Average rainfall days in October:
13.3 days
Average rainfall days in November:
10.9 days
Average rainfall days in December:
11 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (8.1 days).

Average snowfall
Bangor, ME

The month with the highest snowfall is January (8.43").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Bangor, ME

Average snowfall days in January:
13.2 days
Average snowfall days in February:
13.5 days
Average snowfall days in March:
12.3 days
Average snowfall days in April:
3.9 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:
0.3 days
Average snowfall days in November:
4.4 days
Average snowfall days in December:
10.3 days

The month with the highest number of snowfall days is February (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Bangor, 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 3min

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 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

Average sunshine in January:
4h and 4min
Average sunshine in February:
4h and 0min
Average sunshine in March:
5h and 1min
Average sunshine in April:
7h and 0min
Average sunshine in May:
7h and 5min
Average sunshine in June:
8h and 4min

Average sunshine in July:
9h and 4min
Average sunshine in August:
9h and 5min
Average sunshine in September:
8h and 1min
Average sunshine in October:
6h and 1min
Average sunshine in November:
4h and 5min
Average sunshine in December:
4h and 2min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

Average sunshine days
Bangor, ME

Average sunshine days in January:
15.5 days
Average sunshine days in February:
11.8 days
Average sunshine days in March:
11.9 days
Average sunshine days in April:
10.3 days
Average sunshine days in May:
12.6 days
Average sunshine days in June:
12.7 days

Average sunshine days in July:
15.5 days
Average sunshine days in August:
15 days
Average sunshine days in September:
17.3 days
Average sunshine days in October:
15 days
Average sunshine days in November:
15.5 days
Average sunshine days in December:
13.5 days

The month with the most sunshine days is September (17.3 days).
The month with the least sunshine days is April (10.3 days).

Average UV index
Bangor, 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, October, November and December (UV index 2).

Average cloud cover
Bangor, ME

The months with the most cloud cover are February and March (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 38).

Average visibility
Bangor, ME

The months with the highest visibility are October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August and September (5mi).

Climate and monthly weather forecastBangor, ME

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