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 sea temperature 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
A moderate decline in the average high-temperature is seen during December, decreasing from a chilly 44.4°F (6.9°C) in November to an icy 34.3°F (1.3°C). December is noted for a mean low-temperature of 24.1°F (-4.4°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Richmond, during December, the rain falls for 11.3 days and regularly aggregates up to 2.87" (73mm) of precipitation. In Richmond, during the entire year, the rain falls for 139 days and collects up to 27.56" (700mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Richmond, in December, during 7.8 snowfall days, 3.94" (100mm) of snow is typically accumulated. Throughout the year, there are 41.8 snowfall days, and 21.97" (558mm) of snow is accumulated.Ocean temperature
In Richmond, the average seawater temperature in December is 44.8°F (7.1°C).Note: In 44.8°F (7.1°C), cold shock and rapid breathing can occur when swimming at temperatures below 50°F (10°C).
Daylight
December has the shortest days of the year in Richmond, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 6:54 am and sunset at 4:02 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:10 pm EST.
Sunshine
The average sunshine in December is 4.7h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 2 during December leads to these advisories:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the water temperature 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 Richmond?
How many hours of sunshine does Richmond have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Richmond, ME
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Richmond, ME
- Average pressure in December: 30.01"Hg
The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Richmond, ME
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Richmond, ME
- Average humidity in December: 79%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Richmond, ME
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in December
Richmond, ME
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is April (15.1 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in December
Richmond, ME
- Average snowfall in December: 3.94"
The month with the highest snowfall is January (5.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Richmond, ME
- Average snowfall days in December: 7.8 days
The months with the highest number of snowfall days are January and February (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Richmond, ME
- Average sea temperature in December: 44.8°F
The best month for swimming (with the highest average sea temperature) is August (61.5°F).
The coldest month (with the lowest average sea temperature) is March (37.7°F).
Average daylight in December /
Average sunshine in December
Richmond, 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 4min
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
Richmond, ME
- Average sunshine days in December: 13.9 days
The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in December
Richmond, ME
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Richmond, ME
- Average cloud cover in December: 50
The months with the most cloud cover are February, March and April (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Richmond, ME
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, September, October, November and December (6mi).
The months with the lowest visibility are May, June, July and August (5mi).
Richmond, Maine, USA
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