December weather forecast
Calvin, OK

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Weather in December

The first month of the winter, December, is still a chilly month in Calvin, Oklahoma, with an average temperature ranging between min 35.6°F (2°C) and max 49.6°F (9.8°C).

Temperature

The start of December signals a decrease in the average high-temperature, transitioning from a mild 60.1°F (15.6°C) in November to a chilly 49.6°F (9.8°C). In the month of December, the temperature generally rests at an average low of 35.6°F (2°C).

Humidity

The average relative humidity in December is 70%.

Rainfall

In Calvin, in December, it is raining for 7.7 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 131 rainfall days, and 28.39" (721mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Calvin, during December, snow falls for 1 days and regularly aggregates up to 0.31" (8mm) of snow. In Calvin, during the entire year, snow falls for 5.7 days and aggregates up to 3.15" (80mm) of snow.

Daylight

With an average of 9h and 54min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:15 am and sunset at 5:13 pm. On the last day of December, sunrise is at 7:32 am and sunset at 5:23 pm CST.

Sunshine

With an average of 5.7h of sunshine, December has the least sunshine of the year in Calvin.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 2 during December translates into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. When the Sun is at its strongest around midday, find shade and limit exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in December?

In December, in Calvin, the average high-temperature is 49.6°F (9.8°C), and the average low-temperature is 35.6°F (2°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, in September is computed to be 91.4°F (33°C).

What is the average humidity in December?

In December, the average relative humidity is 70%.

How many days does it rain in December?

In Calvin, during December, the rain falls for 7.7 days and regularly aggregates up to 1.57" (40mm) of precipitation.

How much does it snow in December?

In Calvin, in December, during 1 snowfall days, 0.31" (8mm) of snow is typically accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 54min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 51min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:15 am and sunset at 5:13 pm. On the last day of the month, in Calvin, sunrise is at 7:32 am and sunset at 5:23 pm CST.

What is the month with the least sunshine?

With an average of 5.7h of sunshine, December has the least sunshine of the year in Calvin.

How long on average sun shines in December?

In December, the average sunshine duration is 5.7h.

What is the month with the lowest UV index?

With an average maximum UV index of 2, December is the month with the lowest UV index.

What is the UV index reading in December?

In Calvin, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.
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
Calvin, OK

Average temperature in December - Calvin, OK
  • Average high temperature in December: 49.6°F

The warmest month (with the highest average high temperature) is August (92.1°F).
The month with the lowest average high temperature is January (48.7°F).

  • Average low temperature in December: 35.6°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).

Average pressure in December
Calvin, OK

Average pressure in December - Calvin, OK
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in December
Calvin, OK

Average wind speed in December - Calvin, OK
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is March (11mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).

Average humidity in December
Calvin, OK

Average humidity in December - Calvin, OK
  • Average humidity in December: 70%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is August (64%).

Average rainfall in December
Calvin, OK

Average rainfall in December - Calvin, OK
  • Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is February (1.42").

Average rainfall days in December
Calvin, OK

Average rainfall days in December - Calvin, OK
  • Average rainfall days in December: 7.7 days

The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is January (6.7 days).

Average snowfall in December
Calvin, OK

Average snowfall in December - Calvin, OK
  • Average snowfall in December: 0.31"

The month with the highest snowfall is February (1.54").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Calvin, OK

Average snowfall days in December - Calvin, OK
  • Average snowfall days in December: 1 days

The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Calvin, OK

Average daylight in December / Average sunshine in December - Calvin, OK
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in December: 5h and 4min

The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

Average sunshine days in December
Calvin, OK

Average sunshine days in December - Calvin, OK
  • Average sunshine days in December: 20.9 days

The month with the most sunshine days is January (22.5 days).
The month with the least sunshine days is May (14.5 days).

Average UV index in December
Calvin, OK

Average UV index in December - Calvin, OK
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in December
Calvin, OK

Average cloud cover in December - Calvin, OK
  • Average cloud cover in December: 35

The months with the most cloud cover are February and March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 20).

Average visibility in December
Calvin, OK

Average visibility in December - Calvin, OK
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Calvin, Oklahoma, USA

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