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
May's arrival coincides with a temperature rise, moving from April's cool 50.4°F (10.2°C) to a comfortable 64°F (17.8°C). During May nights, Porterfield witnesses a consistent average temperature of 43.3°F (6.3°C).Humidity
In May, the average relative humidity is 77%.Rainfall
In May, the rain falls for 13.7 days. Throughout May, 1.93" (49mm) of precipitation is accumulated. In Porterfield, during the entire year, the rain falls for 131.2 days and collects up to 25.59" (650mm) of precipitation.Snowfall
Months with snowfall in Porterfield are January through May, October through December. May is the last month it regularly snows in Porterfield. During 0.2 snowfall days, in May, Porterfield aggregates 0.35" (9mm) of snow. In Porterfield, during the entire year, snow falls for 49.8 days and aggregates up to 38.19" (970mm) of snow.Daylight
In May, the average length of the day is 14h and 46min.On the first day of the month, sunrise is at 5:34 am and sunset at 7:47 pm. On the last day of May, in Porterfield, sunrise is at 5:04 am and sunset at 8:18 pm EDT.
Sunshine
In May, the average sunshine in Porterfield, Maine, is 8h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index in Porterfield, Maine. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In May, a daily maximum UV index of 5 leads to the following instructions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
What is the usual temperature for Porterfield in May?
What is the average humidity in May in Porterfield?
How much does it rain in Porterfield in May?
What is the last month it snows in Porterfield?
How many hours of daylight does Porterfield have in May?
When are sunrise and sunset in May in Porterfield?
How long on average sun shines in May in Porterfield?
When is the highest UV index in Porterfield?
What is the UV index reading in May in Porterfield?
Average temperature in May
Porterfield, ME
- Average high temperature in May: 64°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in May: 43.3°F
The month with the highest average low temperature is July (56.5°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in May
Porterfield, ME
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Porterfield, ME
- Average wind speed in May: 5.3mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in May
Porterfield, ME
- Average humidity in May: 77%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is November (76%).
Average rainfall in May
Porterfield, ME
- Average rainfall in May: 1.93"
The wettest months (with the highest rainfall) are April and October (2.64").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in May
Porterfield, ME
- Average rainfall days in May: 13.7 days
The months with the highest number of rainy days are April and July (14.3 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in May
Porterfield, ME
- Average snowfall in May: 0.35"
The month with the highest snowfall is February (9.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Porterfield, ME
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Porterfield, 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: 9h and 0min).
- Average sunshine in May: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in May
Porterfield, ME
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is September (18.4 days).
The month with the least sunshine days is April (12.4 days).
Average UV index in May
Porterfield, ME
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in May
Porterfield, ME
- Average cloud cover in May: 49
The month with the most cloud cover is March (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 36).
Average visibility in May
Porterfield, ME
- Average visibility in May: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Porterfield, Maine, USA
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