December weather forecast
Jefferson, OK

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Weather in December

December, the first month of the winter in Jefferson, is also a frosty month, with an average temperature ranging between min 30.9°F (-0.6°C) and max 47.7°F (8.7°C).

Temperature

With the onset of December, Jefferson's average high-temperature adjusts, receding from November's mild 58.6°F (14.8°C) to a chilly 47.7°F (8.7°C). Jefferson experiences an average low-temperature of 30.9°F (-0.6°C) in month of December.

Humidity

In Jefferson, the average relative humidity in December is 67%.

Rainfall

December is the month with the least rainfall. Rain falls for 5.5 days and accumulates 0.71" (18mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Jefferson. In Jefferson, in December, during 1.8 snowfall days, 0.43" (11mm) of snow is typically accumulated. Throughout the year, in Jefferson, Oklahoma, there are 10.5 snowfall days, and 4.02" (102mm) of snow is accumulated.

Daylight

With an average of 9h and 42min of daylight, December has the shortest days of the year in Jefferson.
On the first day of the month, sunrise is at 7:25 am and sunset at 5:15 pm. On the last day of December, sunrise is at 7:43 am and sunset at 5:25 pm CST.

Sunshine

November and December, with an average of 6.3h of sunshine, are months with the least sunshine in Jefferson.

UV index

The month with the lowest UV index in Jefferson is December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 2 during December translates into these guidelines:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Frequently asked questions

What are December temperatures in Jefferson?

Jefferson in December has an average high-temperature of 47.7°F (8.7°C) and an average low-temperature of 30.9°F (-0.6°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is calculated to be 89.6°F (32°C).

What is the average humidity in December in Jefferson?

In Jefferson, Oklahoma, the average relative humidity in December is 67%.

What is the driest month in Jefferson?

December is the month with the least rainfall in Jefferson. Rain falls for 5.5 days and accumulates 0.71" (18mm) of precipitation.

How much does it rain in Jefferson in December?

In Jefferson, in December, during 5.5 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

How much does it snow in Jefferson in December?

In December, in Jefferson, Oklahoma, it is snowing for 1.8 days. Throughout December, 0.43" (11mm) of snow is accumulated.

What is the month with the shortest days in Jefferson?

With an average of 9h and 42min of daylight, December has the shortest days of the year in Jefferson.

What is the average length of the day in December in Jefferson?

In December, the average day length is 9h and 42min.

When are sunrise and sunset in December in Jefferson?

On the first day of December, sunrise is at 7:25 am and sunset at 5:15 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:25 pm CST.

What are the months with the least sunshine in Jefferson?

The months with the least sunshine in Jefferson are November and December, with an average of 6.3h of sunshine.

How many hours of sunshine does Jefferson have in December?

The average sunshine duration in December in Jefferson is 6.3h.

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

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

What is the UV index reading in December in Jefferson?

In Jefferson, Oklahoma, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat 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
Jefferson, OK

Average temperature in December - Jefferson, OK
  • Average high temperature in December: 47.7°F

The warmest month (with the highest average high temperature) is July (95°F).
The month with the lowest average high temperature is January (47.1°F).

  • Average low temperature in December: 30.9°F

The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

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Average pressure in December
Jefferson, OK

Average pressure in December - Jefferson, 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 (29.86"Hg).

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Average wind speed in December
Jefferson, OK

Average wind speed in December - Jefferson, OK
  • Average wind speed in December: 9.9mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

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Average humidity in December
Jefferson, OK

Average humidity in December - Jefferson, OK
  • Average humidity in December: 67%

The month with the highest relative humidity is May (69%).
The months with the lowest relative humidity are July and August (56%).

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Average rainfall in December
Jefferson, OK

Average rainfall in December - Jefferson, OK
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in December
Jefferson, OK

Average rainfall days in December - Jefferson, OK
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (4.3 days).

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Average snowfall in December
Jefferson, OK

Average snowfall in December - Jefferson, OK
  • Average snowfall in December: 0.43"

The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Jefferson, OK

Average snowfall days in December - Jefferson, OK
  • Average snowfall days in December: 1.8 days

The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Jefferson, OK
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in December: 6h and 2min

The months with the most sunshine are June and July (Average sunshine: 11h and 12min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).

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Average sunshine days in December
Jefferson, OK

Average sunshine days in December - Jefferson, OK
  • Average sunshine days in December: 23.9 days

The month with the most sunshine days is December (23.9 days).
The month with the least sunshine days is May (14.3 days).

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Average UV index in December
Jefferson, OK

Average UV index in December - Jefferson, 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).

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Average cloud cover in December
Jefferson, OK

Average cloud cover in December - Jefferson, OK
  • Average cloud cover in December: 29

The months with the most cloud cover are March and April (Cloud cover 35).
The months with the least cloud cover are June and August (Cloud cover 19).

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Average visibility in December
Jefferson, OK

Average visibility in December - Jefferson, 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).

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Jefferson, Oklahoma, USA

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