December weather forecast
Harrisburg, NE

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Weather in December

December is the second coldest month in Harrisburg, with temperatures varying from 20.7°F (-6.3°C) to 35.8°F (2.1°C). Snowfall increases in comparison with November, making it the month with the highest snowfall. It witnesses the shortest days of the year, with decreased sunlight hours. The cloud coverage increases significantly as compared to November and the wind speed picks up slightly, contributing to colder days. Despite the chill, the relative humidity stays towards the higher side of the scale, making the cold slightly damp.

Temperature

With average high and low temperatures of 35.8°F (2.1°C) and 20.7°F (-6.3°C) respectively, December is Harrisburg's coldest month.

Humidity

The average relative humidity in December is 68%.

Rainfall

In Harrisburg, in December, it is raining for 3.5 days, with typically 0.63" (16mm) of accumulated precipitation. In Harrisburg, during the entire year, the rain falls for 110 days and collects up to 14.84" (377mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In Harrisburg, during December, snow falls for 7 days and regularly aggregates up to 2.56" (65mm) of snow. Throughout the year, there are 39.8 snowfall days, and 17.36" (441mm) of snow is accumulated.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:02 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:35 pm MST.

Sunshine

The average sunshine in December is 6.4h.

UV index

The months with the lowest UV index in Harrisburg are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 suggests this advice:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

December, having an average high-temperature of 35.8°F (2.1°C) and an average low-temperature of 20.7°F (-6.3°C), is the coldest month.

How cold is it in December?

In Harrisburg, 35.8°F (2.1°C) is the average high-temperature and 20.7°F (-6.3°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is computed to be 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 68%.

How much does it rain in December?

In December, the rain falls for 3.5 days. Throughout December, 0.63" (16mm) of precipitation is accumulated.

How many days does it snow in December?

In December, it is snowing for 7 days. Throughout December, 2.56" (65mm) of snow is accumulated.

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 Harrisburg have in December?

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

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:02 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:35 pm MST.

How long on average sun shines in December?

In December, the average sunshine duration is 6.4h.

What are the months with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk 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
Harrisburg, NE

Average temperature in December - Harrisburg, NE
  • Average high temperature in December: 35.8°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (35.8°F).

  • Average low temperature in December: 20.7°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).

Average pressure in December
Harrisburg, NE

Average pressure in December - Harrisburg, NE
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in December
Harrisburg, NE

Average wind speed in December - Harrisburg, NE
  • Average wind speed in December: 10.5mph

The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).

Average humidity in December
Harrisburg, NE

Average humidity in December - Harrisburg, NE
  • Average humidity in December: 68%

The month with the highest relative humidity is January (69%).
The month with the lowest relative humidity is September (46%).

Average rainfall in December
Harrisburg, NE

Average rainfall in December - Harrisburg, NE
  • Average rainfall in December: 0.63"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (0.35").

Average rainfall days in December
Harrisburg, NE

Average rainfall days in December - Harrisburg, NE
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is December (3.5 days).

Average snowfall in December
Harrisburg, NE

Average snowfall in December - Harrisburg, NE
  • Average snowfall in December: 2.56"

The month with the highest snowfall is February (2.99").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Harrisburg, NE

Average snowfall days in December - Harrisburg, NE
  • Average snowfall days in December: 7 days

The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Harrisburg, 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: 6h and 2min

The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).

Average sunshine days in December
Harrisburg, NE

Average sunshine days in December - Harrisburg, NE
  • Average sunshine days in December: 21.5 days

The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is July (11.9 days).

Average UV index in December
Harrisburg, NE

Average UV index in December - Harrisburg, 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).

Average cloud cover in December
Harrisburg, NE

Average cloud cover in December - Harrisburg, NE
  • Average cloud cover in December: 32

The month with the most cloud cover is February (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 17).

Average visibility in December
Harrisburg, NE

Average visibility in December - Harrisburg, 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).

Harrisburg, Nebraska, USA

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