May weather forecastMattawamkeag, ME
May
Weather in May
May, the last month of the spring in Mattawamkeag, is an enjoyable month, with an average temperature varying between 62.6°F (17°C) and 42.6°F (5.9°C).Temperature
The beginning of May signals a rise in the average high-temperature, moving from a frosty 49.1°F (9.5°C) in April to a refreshing 62.6°F (17°C). During May, Mattawamkeag observes a consistent average nighttime temperature of 42.6°F (5.9°C).Humidity
With an average relative humidity of 75%, May is the least humid month.Rainfall
In May, the rain falls for 11.6 days. Throughout May, 1.14" (29mm) of precipitation is accumulated. In Mattawamkeag, during the entire year, the rain falls for 105.2 days and collects up to 12.4" (315mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Mattawamkeag aggregates 0.2" (5mm) of snow. In Mattawamkeag, during the entire year, snow falls for 50.6 days and aggregates up to 15.59" (396mm) of snow.Daylight
In May, the average length of the day is 14h and 55min.On the first day of the month, sunrise is at 5:20 am and sunset at 7:40 pm. On the last day of May, sunrise is at 4:48 am and sunset at 8:14 pm EDT.
Sunshine
In May, the average sunshine is 7.8h.UV index
In Mattawamkeag, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Mattawamkeag, ME
- Average high temperature in May: 62.6°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in May: 42.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (11.3°F).
Average pressure in May
Mattawamkeag, ME
- Average pressure in May: 29.98"Hg
The months with the highest atmospheric pressure are September and November (30.03"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Mattawamkeag, ME
- Average wind speed in May: 6.8mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in May
Mattawamkeag, ME
- Average humidity in May: 75%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is May (75%).
Average rainfall in May
Mattawamkeag, ME
- Average rainfall in May: 1.14"
The wettest month (with the highest rainfall) is April (1.38").
The driest months (with the least rainfall) are March, July and September (0.75").
Average rainfall days in May
Mattawamkeag, ME
- Average rainfall days in May: 11.6 days
The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in May
Mattawamkeag, ME
- Average snowfall in May: 0.2"
The month with the highest snowfall is January (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Mattawamkeag, ME
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (11 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Mattawamkeag, ME
- Average daylight in May: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 7h and 48min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in May
Mattawamkeag, ME
- Average sunshine days in May: 17.3 days
The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is April (14.8 days).
Average UV index in May
Mattawamkeag, 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, October, November and December (UV index 2).
Average cloud cover in May
Mattawamkeag, ME
- Average cloud cover in May: 51
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in May
Mattawamkeag, ME
- Average visibility in May: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).





