December weather forecast
Calvert, PA

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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.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

The high-temperature, in December, in Calvert, is 36.9°F (2.7°C), while the low-temperature averages to 26.8°F (-2.9°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in July is evaluated at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December in Calvert is 83%.

How many days does it rain in December?

In Calvert, in December, it is raining for 11.5 days, with typically 2.28" (58mm) of accumulated precipitation.

How many days does it snow in December?

In Calvert, during December, snow falls for 8.2 days and regularly aggregates up to 3.23" (82mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 12min of daylight.

How many hours of daylight does Calvert have in December?

The average day length in December is 9h and 14min.

When are sunrise and sunset in December in Calvert?

In December, on the first day of the month, sunrise is at 7:15 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:48 pm EST.

How many hours of sunshine does Calvert have in December?

In Calvert, the average sunshine duration in December is 3.9h.

What is the month with the lowest UV index in Calvert?

December is the month with the lowest UV index, with an average maximum UV index of 1.

How high is the UV index in December?

In Calvert, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Calvert, PA

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in December - Calvert, PA
  • Average daylight in December: 9h and 1min

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 5min

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 - 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 - 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 - 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 - 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).

Calvert, Pennsylvania, USA

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