December weather forecast
Broken Arrow, OK

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Weather in December

December ranges from 34.3°F (1.3°C) to 48.6°F (9.2°C) in Broken Arrow, Oklahoma. It marks the onset of the cold season with the lowest temperatures of the year. Snow begins to fall again this month, covering the cityscape in a thin white blanket. The UV index drops back down to 2, mirroring the levels observed at the year's start. Despite being winter, this month's wind speed decreases compared to November's peak.

Temperature

The average high-temperature decreases in December, shifting from a moderate 59.2°F (15.1°C) in November to a chilly 48.6°F (9.2°C). Broken Arrow's nighttime temperature during December is consistently averaged at a wintry 34.3°F (1.3°C).

Humidity

In December, the average relative humidity in Broken Arrow is 70%.

Rainfall

In Broken Arrow, Oklahoma, in December, it is raining for 7.1 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, in Broken Arrow, there are 131.3 rainfall days, and 29.84" (758mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through March, November and December. In Broken Arrow, in December, during 0.9 snowfall days, 0.43" (11mm) of snow is typically accumulated. Throughout the year, in Broken Arrow, there are 6.2 snowfall days, and 3.35" (85mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Broken Arrow, Oklahoma, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 7:16 am and sunset at 5:08 pm. On the last day of December, sunrise is at 7:33 am and sunset at 5:19 pm CST.

Sunshine

With an average of 5.6h of sunshine, December has the least sunshine of the year in Broken Arrow.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 2 in December leads to these recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
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Frequently asked questions

What are the temperatures in Broken Arrow in December?

The high-temperature, in December, in Broken Arrow, is 48.6°F (9.2°C), while the low-temperature averages to 34.3°F (1.3°C). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 89.6°F (32°C).

What is the average humidity in December in Broken Arrow?

In Broken Arrow, the average relative humidity in December is 70%.

How much does it rain in Broken Arrow in December?

In Broken Arrow, Oklahoma, in December, during 7.1 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

How many days does it snow in December in Broken Arrow?

In Broken Arrow, Oklahoma, in December, snow falls for 0.9 days, with typically accumulated 0.43" (11mm) of snow.

What is the month with the shortest days in Broken Arrow?

With an average of 9h and 48min of daylight, December has the shortest days of the year.

How many hours of daylight does Broken Arrow have in December?

In Broken Arrow, Oklahoma, the average day length in December is 9h and 46min.

What time are sunrise and sunset in December in Broken Arrow?

On the first day of December in Broken Arrow, Oklahoma, sunrise is at 7:16 am and sunset at 5:08 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 5:19 pm CST.

What is the month with the least sunshine in Broken Arrow?

With an average of 5.6h of sunshine, December has the least sunshine of the year in Broken Arrow, Oklahoma.

How long on average sun shines in December in Broken Arrow?

The average sunshine duration in December is 5.6h.

When is the lowest UV index in Broken Arrow?

The months with the lowest UV index in Broken Arrow are January and December, with an average maximum UV index of 2.

How high is the UV index in December in Broken Arrow?

In December, the average daily maximum UV index in Broken Arrow, Oklahoma, is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to 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
Broken Arrow, OK

Average temperature in December - Broken Arrow, OK
  • Average high temperature in December: 48.6°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (46.4°F).

  • Average low temperature in December: 34.3°F

The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

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Average pressure in December
Broken Arrow, OK

Average pressure in December - Broken Arrow, 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 (29.9"Hg).

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Average wind speed in December
Broken Arrow, OK

Average wind speed in December - Broken Arrow, OK
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is March (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).

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Average humidity in December
Broken Arrow, OK

Average humidity in December - Broken Arrow, OK
  • Average humidity in December: 70%

The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January, August and October (68%).

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Average rainfall in December
Broken Arrow, OK

Average rainfall in December - Broken Arrow, OK
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is May (5.16").
The driest months (with the least rainfall) are January and February (1.38").

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Average rainfall days in December
Broken Arrow, OK

Average rainfall days in December - Broken Arrow, OK
  • Average rainfall days in December: 7.1 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.2 days).

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Average snowfall in December
Broken Arrow, OK

Average snowfall in December - Broken Arrow, OK
  • Average snowfall in December: 0.43"

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

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Average snowfall days in December
Broken Arrow, OK

Average snowfall days in December - Broken Arrow, OK
  • Average snowfall days in December: 0.9 days

The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Broken Arrow, OK

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

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 48min).

  • Average sunshine in December: 5h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

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Average sunshine days in December
Broken Arrow, OK

Average sunshine days in December - Broken Arrow, OK
  • Average sunshine days in December: 22 days

The month with the most sunshine days is December (22 days).
The month with the least sunshine days is May (13.4 days).

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Average UV index in December
Broken Arrow, OK

Average UV index in December - Broken Arrow, OK
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in December
Broken Arrow, OK

Average cloud cover in December - Broken Arrow, OK
  • Average cloud cover in December: 36

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in December
Broken Arrow, OK

Average visibility in December - Broken Arrow, 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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Broken Arrow, Oklahoma, USA

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