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
As Calais transitions into May, the average high-temperature shows a change, moving from a frosty 47.8°F (8.8°C) in April to a refreshing 59.4°F (15.2°C). During May, the nighttime temperature averages to a cold 42.4°F (5.8°C).Humidity
May is the least humid month, with an average relative humidity of 78%.Rainfall
In Calais, in May, during 17.1 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. Throughout the year, in Calais, there are 155.3 rainfall days, and 32.48" (825mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Calais aggregates 0.51" (13mm) of snow. In Calais, during the entire year, snow falls for 64.6 days and aggregates up to 30.47" (774mm) of snow.Daylight
In May, the average length of the day in Calais is 14h and 53min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:35 pm. On the last day of May, sunrise is at 5:44 am and sunset at 9:08 pm ADT.
Sunshine
In Calais, the average sunshine in May is 7.7h.UV index
The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In May, a daily UV index of 4 turns into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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 in Calais?
How much does it rain in Calais in May?
What is the last month it snows?
What is the average length of the day in May in Calais?
What time are sunrise and sunset in May?
How many hours of sunshine does Calais have in May?
What is the UV index intensity in May?
Average temperature in May
Calais, ME
- Average high temperature in May: 59.4°F
The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in May: 42.4°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 (13.8°F).
Average pressure in May
Calais, ME
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is September (30.03"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Calais, ME
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is March (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in May
Calais, ME
- Average humidity in May: 78%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is May (78%).
Average rainfall in May
Calais, ME
- Average rainfall in May: 2.87"
The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is August (1.77").
Average rainfall days in May
Calais, ME
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is April (17.2 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in May
Calais, ME
- Average snowfall in May: 0.51"
The month with the highest snowfall is January (7.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Calais, ME
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Calais, ME
- Average daylight in May: 14h and 5min
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 4min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in May
Calais, ME
- Average sunshine days in May: 11.3 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is April (8.5 days).
Average UV index in May
Calais, 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
Calais, ME
- Average cloud cover in May: 51
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in May
Calais, ME
- Average visibility in May: 6mi
The months with the highest visibility are May, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, June, July, August and September (5mi).
Calais, Maine, USA
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