May weather forecastPalermo, ME
May
Weather in May
The last month of the spring, May, is a comfortable month in Palermo, Maine, with an average temperature fluctuating between 43.3°F (6.3°C) and 61.7°F (16.5°C).Temperature
May's onset brings a rise in the average high-temperature, moving from a chilly 49.6°F (9.8°C) in April to an enjoyable 61.7°F (16.5°C). Throughout May, Palermo records an average temperature of 43.3°F (6.3°C) at night.Humidity
The average relative humidity in May is 80%.Rainfall
In May, the rain falls for 15.7 days. Throughout May, 2.4" (61mm) of precipitation is accumulated. In Palermo, during the entire year, the rain falls for 143.5 days and collects up to 31.02" (788mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Palermo. During 0.2 snowfall days, in May, Palermo aggregates 0.63" (16mm) of snow. In Palermo, during the entire year, snow falls for 50.1 days and aggregates up to 32.87" (835mm) of snow.Daylight
In May, the average length of the day in Palermo is 14h and 49min.On the first day of May, sunrise is at 5:27 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 4:56 am and sunset at 8:14 pm EDT.
Sunshine
In Palermo, the average sunshine in May is 7.7h.UV index
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 unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 in May translates into this advice:
Take precautions - Protection against skin and eye damage is obliged. It's recommended to limit sun exposure when its radiation is at its peak during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. 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
Palermo, ME
- Average high temperature in May: 61.7°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in May: 43.3°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 (12.9°F).
Average pressure in May
Palermo, ME
- Average pressure in May: 29.99"Hg
The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Palermo, ME
- Average wind speed in May: 7.2mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in May
Palermo, ME
- Average humidity in May: 80%
The months with the highest relative humidity are January, February and March (84%).
The months with the lowest relative humidity are April and November (78%).
Average rainfall in May
Palermo, ME
- Average rainfall in May: 2.4"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in May
Palermo, ME
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is February (6 days).
Average snowfall in May
Palermo, ME
- Average snowfall in May: 0.63"
The month with the highest snowfall is January (7.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Palermo, ME
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Palermo, ME
- Average daylight in May: 14h and 48min
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 May: 7h and 42min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in May
Palermo, ME
- Average sunshine days in May: 12.9 days
The months with the most sunshine days are September and November (16.8 days).
The month with the least sunshine days is April (11.3 days).
Average UV index in May
Palermo, 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
Palermo, ME
- Average cloud cover in May: 52
The months with the most cloud cover are February, March and April (Cloud cover 54).
The month with the least cloud cover is September (Cloud cover 39).
Average visibility in May
Palermo, ME
- Average visibility in May: 5mi
The months with the highest visibility are November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and October (5mi).
