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 from April to May brings an increase in the average high-temperature, moving from a chilly 47.8°F (8.8°C) to a refreshing 59.4°F (15.2°C). In Calais, the average low-temperature during the month of May is a wintry 42.4°F (5.8°C).Humidity
The least humid month in Calais is May, with an average relative humidity of 78%.Rainfall
In May, the rain falls for 17.1 days. Throughout May, 2.87" (73mm) of precipitation is accumulated. In Calais, during the entire year, the rain falls for 155.3 days and collects up to 32.48" (825mm) of precipitation.Snowfall
Months with snowfall in Calais are January through May, October through December. 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 Calais, the average length of the day in May 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, in Calais, sunrise is at 5:44 am and sunset at 9:08 pm ADT.
Sunshine
In May, the average sunshine in Calais 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 medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 4 during May leads to these instructions:
Be vigilant - Preventing sunburn is recommended. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
What are the temperatures in Calais in May?
What is the least humid month in Calais?
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 in Calais?
What is the average length of the day in May in Calais?
When is the sunrise / sunset in May in Calais?
How many hours of sunshine does Calais have in May?
How high is the UV index in May in Calais?
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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