December weather forecastCalvert, PA
December
Weather in December
December, the first month of the winter in Calvert, is still a cold month, with an average temperature fluctuating between 26.8°F (-2.9°C) and 36.9°F (2.7°C).Temperature
The beginning of December involves a decrease in the average high-temperature, transitioning from a frosty 46.6°F (8.1°C) in November to a cold 36.9°F (2.7°C). Calvert's temperature in December lowers to a consistent average of 26.8°F (-2.9°C) during the nights.Humidity
The average relative humidity in December is 83%.Rainfall
In Calvert, in December, it is raining for 11.5 days, with typically 2.28" (58mm) of accumulated precipitation. In Calvert, during the entire year, the rain falls for 170.2 days and collects up to 32.2" (818mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Calvert, during December, snow falls for 8.2 days and regularly aggregates up to 3.23" (82mm) of snow. In Calvert, during the entire year, snow falls for 41.9 days and aggregates up to 19.76" (502mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Calvert.On the first day of the month, sunrise is at 7:15 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:33 am and sunset at 4:48 pm EST.
Sunshine
The average sunshine in December in Calvert is 3.9h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Calvert. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: In December, the UV index of 1 transforms into the following advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Calvert, PA
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in December: 26.8°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 (19°F).
Average pressure in December
Calvert, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Calvert, PA
- Average wind speed in December: 7.2mph
The windiest months (with the highest average wind speed) are January, March and April (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Calvert, PA
- Average humidity in December: 83%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Calvert, PA
- Average rainfall in December: 2.28"
The wettest month (with the highest rainfall) is July (3.43").
The driest month (with the least rainfall) is November (1.93").
Average rainfall days in December
Calvert, PA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in December
Calvert, PA
- Average snowfall in December: 3.23"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Calvert, PA
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Calvert, PA
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in December
Calvert, PA
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in December
Calvert, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Calvert, PA
- Average cloud cover in December: 59
The months with the most cloud cover are January, February and December (Cloud cover 59).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Calvert, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
