Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
In Rockland, the onset of May comes with a modest high-temperature shift, transitioning from April's frosty 45.9°F (7.7°C) to a fresh 54.1°F (12.3°C). Nighttime temperature sees a small decrement from daytime highs, dipping to an average of 46.2°F (7.9°C) during May.Humidity
In Rockland, the average relative humidity in May is 83%.Rainfall
In Rockland, in May, it is raining for 15.3 days, with typically 2.36" (60mm) of accumulated precipitation. In Rockland, during the entire year, the rain falls for 144.8 days and collects up to 30.63" (778mm) of precipitation.Snowfall
In Rockland, snow does not fall in May through October.Ocean temperature
In May, the average ocean temperature is 45.1°F (7.3°C).Note: Swimming in 45.1°F (7.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.
Daylight
The average length of the day in May is 14h and 47min.On the first day of May, sunrise is at 5:26 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 4:56 am and sunset at 8:12 pm EDT.
Sunshine
In Rockland, the average sunshine in May is 8.1h.UV index
In Rockland, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 4 in May leads to these guidelines:
Exercise prevention - Warding off sunburn is urged. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rockland in May?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
Does it snow in May?
What is the water temperature in May in Rockland?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Rockland, ME
- Average high temperature in May: 54.1°F
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).
- Average low temperature in May: 46.2°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 in May
Rockland, ME
- Average pressure in May: 29.99"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 in May
Rockland, ME
- Average wind speed in May: 10mph
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 in May
Rockland, ME
- Average humidity in May: 83%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (75%).
Average rainfall in May
Rockland, ME
- Average rainfall in May: 2.36"
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 in May
Rockland, ME
- Average rainfall days in May: 15.3 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 in May
Rockland, ME
- Average snowfall in May: 0"
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 in May
Rockland, ME
- Average snowfall days in May: 0.1 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 in May
Rockland, ME
- Average sea temperature in May: 45.1°F
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 in May /
Average sunshine in May
Rockland, ME
- Average daylight in May: 14h 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 May: 8h and 1min
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 in May
Rockland, ME
- Average sunshine days in May: 13.8 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 in May
Rockland, ME
- Average UV index in May: 4
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 in May
Rockland, ME
- Average cloud cover in May: 47
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 in May
Rockland, ME
- Average visibility in May: 6mi
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
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