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
December's onset corresponds with a shift in the average high-temperature, moving from a frosty 43.9°F (6.6°C) in November to an icy 32.7°F (0.4°C). Lewiston, in December, witnesses an average low-temperature of 22.1°F (-5.5°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Lewiston, Maine, in December, during 5.9 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Lewiston, during the entire year, the rain falls for 103.5 days and collects up to 14.96" (380mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Lewiston, during December, snow falls for 7.1 days and regularly aggregates up to 3.66" (93mm) of snow. In Lewiston, during the entire year, snow falls for 36.8 days and aggregates up to 18.31" (465mm) 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 December, sunrise is at 6:56 am and sunset at 4:03 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:12 pm EST.
Sunshine
In December, the average sunshine is 4.7h.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 value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be on the lookout! Nearly twofold UV radiation 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 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?
What time are sunrise and sunset in December in Lewiston?
How long on average sun shines in December in Lewiston?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Lewiston, ME
- Average high temperature in December: 32.7°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 22.1°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 (13.3°F).
Average pressure in December
Lewiston, ME
- Average pressure in December: 30.02"Hg
The month with the highest atmospheric pressure is November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Lewiston, ME
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Lewiston, ME
- Average humidity in December: 79%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Lewiston, ME
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is October (1.69").
The driest month (with the least rainfall) is September (0.67").
Average rainfall days in December
Lewiston, ME
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is February (4 days).
Average snowfall in December
Lewiston, ME
- Average snowfall in December: 3.66"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lewiston, ME
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lewiston, 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 6min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Lewiston, ME
- Average sunshine days in December: 19 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (16.2 days).
Average UV index in December
Lewiston, 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, October, November and December (UV index 2).
Average cloud cover in December
Lewiston, ME
- Average cloud cover in December: 49
The month with the most cloud cover is March (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 36).
Average visibility in December
Lewiston, ME
- Average visibility in December: 6mi
The months with the highest visibility are January, November and December (6mi).
The months with the lowest visibility are February, March, April, May, June, July, August, September and October (5mi).
Lewiston, Maine, USA
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