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 transition into December involves a small decrease in the average high-temperature, dipping slightly from a chilly 47.3°F (8.5°C) in November to an icy 39.7°F (4.3°C). In December, a low-temperature average of 32.4°F (0.2°C) is characteristic of Isle au Haut, marking a minor shift from daytime temperatures.Humidity
The average relative humidity in December is 77%.Rainfall
In Isle au Haut, in December, during 9 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. Throughout the year, in Isle au Haut, there are 109.9 rainfall days, and 9.72" (247mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Isle au Haut. In Isle au Haut, in December, snow falls for 7.3 days, with typically accumulated 0.67" (17mm) of snow. Throughout the year, there are 30.9 snowfall days, and 2.91" (74mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:50 am and sunset at 3:57 pm. On the last day of December, sunrise is at 7:09 am and sunset at 4:06 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 4.3h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold is December in Isle au Haut?
What is the average humidity in December in Isle au Haut?
How many days does it rain in December in Isle au Haut?
How much does it snow in Isle au Haut in December?
What is the month with the shortest days in Isle au Haut?
How many hours of daylight does Isle au Haut have in December?
What time are sunrise and sunset in December in Isle au Haut?
What is the month with the least sunshine in Isle au Haut?
How many hours of sunshine does Isle au Haut have in December?
What is the month with the lowest UV index in Isle au Haut?
What is the UV index intensity in December in Isle au Haut?
Average temperature in December
Isle au Haut, ME
- Average high temperature in December: 39.7°F
The warmest month (with the highest average high temperature) is August (65.7°F).
The month with the lowest average high temperature is January (34.7°F).
- Average low temperature in December: 32.4°F
The month with the highest average low temperature is August (61.7°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Isle au Haut, ME
- Average pressure in December: 29.99"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
Isle au Haut, ME
- Average wind speed in December: 18.8mph
The windiest month (with the highest average wind speed) is January (19.4mph).
The calmest months (with the lowest average wind speed) are July and August (10.3mph).
Average humidity in December
Isle au Haut, ME
- Average humidity in December: 77%
The months with the highest relative humidity are June, July and August (86%).
The month with the lowest relative humidity is November (74%).
Average rainfall in December
Isle au Haut, ME
- Average rainfall in December: 0.91"
The wettest months (with the highest rainfall) are October and November (1.02").
The driest months (with the least rainfall) are August and September (0.55").
Average rainfall days in December
Isle au Haut, ME
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is July (11.6 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in December
Isle au Haut, ME
- Average snowfall in December: 0.67"
The month with the highest snowfall is January (0.79").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Isle au Haut, ME
- Average snowfall days in December: 7.3 days
The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Isle au Haut, ME
- Average daylight in December: 8h 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: 8h and 54min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in December
Isle au Haut, ME
- Average sunshine days in December: 13.7 days
The month with the most sunshine days is August (21.2 days).
The month with the least sunshine days is February (13.5 days).
Average UV index in December
Isle au Haut, ME
- Average UV index in December: 2
The months with the highest UV index are 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
Isle au Haut, ME
- Average cloud cover in December: 54
The months with the most cloud cover are February and December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Isle au Haut, ME
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Isle au Haut, Maine, USA
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