Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The shift from November to December corresponds with a decrease in the average high-temperature, down to a wintry 34.2°F (1.2°C) from a chilly 44.1°F (6.7°C). In Islesboro, an average temperature of 24.1°F (-4.4°C) is noted during December nights.Humidity
The average relative humidity in December in Islesboro is 79%.Rainfall
The month with the most rainfall is December, when the rain falls for 10.1 days and typically aggregates up to 2.72" (69mm) of precipitation.Snowfall
Months with snowfall in Islesboro, Maine, are January through May, October through December. In Islesboro, Maine, in December, snow falls for 8.9 days, with typically accumulated 2.28" (58mm) of snow. In Islesboro, Maine, during the entire year, snow falls for 44.3 days and aggregates up to 16.81" (427mm) of snow.Daylight
The month with the shortest days in Islesboro, Maine, is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 6:51 am and sunset at 3:57 pm. On the last day of December, in Islesboro, sunrise is at 7:11 am and sunset at 4:06 pm EST.
Sunshine
In December, the average sunshine in Islesboro is 4.4h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Islesboro. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Islesboro?
What is the average humidity in December in Islesboro?
What is the wettest month in Islesboro?
How much does it rain in Islesboro in December?
How many days does it snow in December in Islesboro?
What is the month with the shortest days in Islesboro?
What is the average length of the day in December in Islesboro?
What time are sunrise and sunset in December in Islesboro?
How long on average sun shines in December in Islesboro?
What is the month with the lowest UV index in Islesboro?
What is the UV index reading in December in Islesboro?
Average temperature in December
Islesboro, ME
- Average high temperature in December: 34.2°F
The warmest months (with the highest average high temperature) are July and August (73.9°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Islesboro, ME
- Average pressure in December: 30"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Islesboro, ME
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in December
Islesboro, ME
- Average humidity in December: 79%
The months with the highest relative humidity are February and July (83%).
The month with the lowest relative humidity is November (77%).
Average rainfall in December
Islesboro, ME
- Average rainfall in December: 2.72"
The wettest month (with the highest rainfall) is December (2.72").
The driest months (with the least rainfall) are July and September (1.46").
Average rainfall days in December
Islesboro, ME
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in December
Islesboro, ME
- Average snowfall in December: 2.28"
The month with the highest snowfall is January (4.57").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Islesboro, ME
- Average snowfall days in December: 8.9 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Islesboro, ME
- Average daylight in December: 8h and 5min
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 December: 4h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Islesboro, ME
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in December
Islesboro, ME
- Average UV index in December: 2
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 December
Islesboro, ME
- Average cloud cover in December: 52
The month with the most cloud cover is March (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in December
Islesboro, ME
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
Islesboro, Maine, USA
Weather forecast for your location
2. Allow the app to use your location
