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
As Isle au Haut enters December, the average high-temperature subtly lowers from the a frosty 47.3°F (8.5°C) of November to a wintry 39.7°F (4.3°C). During December, Isle au Haut's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at a still cold 32.4°F (0.2°C).Humidity
The average relative humidity in December is 77%.Rainfall
In December, the rain falls for 9 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. In Isle au Haut, during the entire year, the rain falls for 109.9 days and collects up to 9.72" (247mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Isle au Haut, in December, snow falls for 7.3 days, with typically accumulated 0.67" (17mm) of snow. In Isle au Haut, during the entire year, snow falls for 30.9 days and aggregates up to 2.91" (74mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 54min of daylight.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 value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. 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
Is December cold in Isle au Haut?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December in Isle au Haut?
What is the month with the shortest days?
How many hours of daylight does Isle au Haut have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
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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