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
Harrison's average high-temperature decreases in December, falling from a chilly 43°F (6.1°C) in November to a freezing cold 31.3°F (-0.4°C). The nighttime temperature, during December, averages of 21°F (-6.1°C).Humidity
In December, the average relative humidity is 80%.Rainfall
In Harrison, during December, the rain falls for 10.6 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Harrison, Maine, during the entire year, the rain falls for 146 days and collects up to 27.91" (709mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Harrison, during December, snow falls for 10.2 days and regularly aggregates up to 6.46" (164mm) of snow. In Harrison, during the entire year, snow falls for 55.1 days and aggregates up to 42.52" (1080mm) 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 6:58 am and sunset at 4:05 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:14 pm EST.
Sunshine
The average sunshine in December is 4.9h.UV index
January through March, October through 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 hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December in Harrison?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Harrison, ME
- Average high temperature in December: 31.3°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in December: 21°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 (11.7°F).
Average pressure in December
Harrison, ME
- Average pressure in December: 30.02"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Harrison, ME
- Average wind speed in December: 5.7mph
The windiest months (with the highest average wind speed) are January, March and April (6.2mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Harrison, ME
- Average humidity in December: 80%
The months with the highest relative humidity are January, February and March (85%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Harrison, ME
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is October (3.15").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in December
Harrison, ME
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in December
Harrison, ME
- Average snowfall in December: 6.46"
The month with the highest snowfall is February (10.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harrison, ME
- Average snowfall days in December: 10.2 days
The month with the highest number of snowfall days is February (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harrison, 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 5min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Harrison, ME
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is April (12.3 days).
Average UV index in December
Harrison, 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, October, November and December (UV index 2).
Average cloud cover in December
Harrison, ME
- Average cloud cover in December: 48
The months with the most cloud cover are February, March and April (Cloud cover 50).
The months with the least cloud cover are August and September (Cloud cover 36).
Average visibility in December
Harrison, ME
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Harrison, Maine, USA
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