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 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
The shift into May brings a noticeable increase in the average high-temperature, soaring from a frosty 43.9°F (6.6°C) in April to a refreshing 60.1°F (15.6°C). The average low-temperature during May nights is a wintry 40.8°F (4.9°C).Humidity
May is the least humid month, with an average relative humidity of 75%.Rainfall
In May, the rain falls for 17.3 days. Throughout May, 2.72" (69mm) of precipitation is accumulated. Throughout the year, there are 144.3 rainfall days, and 32.13" (816mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.9 snowfall days, in May, Portage aggregates 0.63" (16mm) of snow. In Portage, during the entire year, snow falls for 98.7 days and aggregates up to 69.17" (1757mm) of snow.Daylight
In May, the average length of the day is 15h and 4min.On the first day of May, sunrise is at 5:17 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 4:43 am and sunset at 8:19 pm EDT.
Sunshine
The average sunshine in May is 7.4h.UV index
The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A daily maximum UV index of 4 in May translates into the following instructions:
Ensure safety - Sun damage prevention is strongly urged. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the least humid month?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Portage, ME
- Average high temperature in May: 60.1°F
The warmest month (with the highest average high temperature) is July (75.2°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in May: 40.8°F
The month with the highest average low temperature is July (54.9°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in May
Portage, ME
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is September (30.02"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Portage, ME
- Average wind speed in May: 7.8mph
The windiest months (with the highest average wind speed) are January, February and March (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in May
Portage, ME
- Average humidity in May: 75%
The month with the highest relative humidity is March (93%).
The month with the lowest relative humidity is May (75%).
Average rainfall in May
Portage, ME
- Average rainfall in May: 2.72"
The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is February (2.2").
Average rainfall days in May
Portage, ME
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in May
Portage, ME
- Average snowfall in May: 0.63"
The month with the highest snowfall is January (15.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Portage, ME
- Average snowfall days in May: 0.9 days
The month with the highest number of snowfall days is February (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Portage, ME
- Average daylight in May: 15h and 1min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in May: 7h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 2h and 6min).
Average sunshine days in May
Portage, ME
- Average sunshine days in May: 11.9 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in May
Portage, ME
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in May
Portage, ME
- Average cloud cover in May: 54
The month with the most cloud cover is February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 43).
Average visibility in May
Portage, ME
- Average visibility in May: 5mi
The months with the highest visibility are May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Portage, Maine, USA
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