December weather forecast
Westerville, NE

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Weather in December

December, the first month of the winter in Westerville, is also an icy month, with temperature in the range of an average high of 34.7°F (1.5°C) and an average low of 21.7°F (-5.7°C).

Temperature

December ushers in a slight temperature change, with average high-temperatures reducing from November's frosty 48.7°F (9.3°C) to a cold 34.7°F (1.5°C). An average low-temperature of 21.7°F (-5.7°C) is observed during December nights in Westerville.

Humidity

In Westerville, the average relative humidity in December is 73%.

Rainfall

In December, the rain falls for 3.7 days. Throughout December, 1.06" (27mm) of precipitation is accumulated. Throughout the year, there are 93.8 rainfall days, and 15.75" (400mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. The months with the most snowfall are February and December, with an average 3.62" (92mm) of accumulated snow.

Daylight

December has the shortest days of the year in Westerville, Nebraska, with an average of 9h and 12min of daylight.
On the first day of December, sunrise is at 7:44 am and sunset at 5:08 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 5:18 pm CST.

Sunshine

In December, the average sunshine in Westerville, Nebraska, is 5.8h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 2 during December translates into the following guidance:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
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Frequently asked questions

How cold is it in Westerville in December?

In Westerville, 34.7°F (1.5°C) is the average high-temperature and 21.7°F (-5.7°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 89.6°F (32°C).

What is the average humidity in December in Westerville?

In December, the average relative humidity is 73%.

How much does it rain in Westerville in December?

In Westerville, in December, during 3.7 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

When does it snow the most in Westerville?

The months with the most snowfall in Westerville are February and December, with an average 3.62" (92mm) of accumulated snow.

How much does it snow in Westerville in December?

In Westerville, Nebraska, in December, snow falls for 6.9 days, with typically accumulated 3.62" (92mm) of snow.

What is the month with the shortest days in Westerville?

With an average of 9h and 12min of daylight, December has the shortest days of the year in Westerville.

How many hours of daylight does Westerville have in December?

In December, the average day length in Westerville, Nebraska, is 9h and 14min.

What time are sunrise and sunset in December in Westerville?

On the first day of December, sunrise is at 7:44 am and sunset at 5:08 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 5:18 pm CST.

How many hours of sunshine does Westerville have in December?

In Westerville, the average sunshine duration in December is 5.8h.

When is the lowest UV index in Westerville?

The months with the lowest UV index in Westerville are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Westerville?

The average daily maximum UV index in December in Westerville, Nebraska, 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
Westerville, NE

Average temperature in December - Westerville, NE
  • Average high temperature in December: 34.7°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (33.8°F).

  • Average low temperature in December: 21.7°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in December
Westerville, NE

Average pressure in December - Westerville, NE
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in December
Westerville, NE

Average wind speed in December - Westerville, NE
  • Average wind speed in December: 10.9mph

The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).

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Average humidity in December
Westerville, NE

Average humidity in December - Westerville, NE
  • Average humidity in December: 73%

The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is October (60%).

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Average rainfall in December
Westerville, NE

Average rainfall in December - Westerville, NE
  • Average rainfall in December: 1.06"

The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in December
Westerville, NE

Average rainfall days in December - Westerville, NE
  • Average rainfall days in December: 3.7 days

The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is December (3.7 days).

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Average snowfall in December
Westerville, NE

Average snowfall in December - Westerville, NE
  • Average snowfall in December: 3.62"

The months with the highest snowfall are February and December (3.62").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Westerville, NE

Average snowfall days in December - Westerville, NE
  • Average snowfall days in December: 6.9 days

The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Westerville, NE

Average daylight in December / Average sunshine in December - Westerville, NE
  • 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: 5h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).

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Average sunshine days in December
Westerville, NE

Average sunshine days in December - Westerville, NE
  • Average sunshine days in December: 20.9 days

The month with the most sunshine days is October (23 days).
The month with the least sunshine days is April (14.6 days).

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Average UV index in December
Westerville, NE

Average UV index in December - Westerville, NE
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Westerville, NE

Average cloud cover in December - Westerville, NE
  • Average cloud cover in December: 37

The months with the most cloud cover are January and February (Cloud cover 41).
The months with the least cloud cover are July and September (Cloud cover 23).

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Average visibility in December
Westerville, NE

Average visibility in December - Westerville, NE
  • 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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Westerville, Nebraska, USA

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