December weather forecast
Rexburg, ID

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The crossroads near a large lit temple in Rexburg, Idaho, with a view of the rest of the city and a colorful, cloudy sunset sky on the horizon
The crossroads near a large lit temple in Rexburg, Idaho, with a view of the rest of the city and a colorful, cloudy sunset sky on the horizon

Weather in December

December sees Rexburg fully engulfed in winter, associated with a sharp drop in temperatures to around 26.6°F (-3°C) for the high and 14.9°F (-9.5°C) for the low. Snowfall becomes frequent, wrapping the city in a thick blanket of white. The fading daylight hours and frequent snow give Rexburg a wonderful wintery ambiance, closing out the year in a serene, frosty setting. Sustained low temperatures and high humidity ensure that the mesmerizing white panorama persists into the New Year.

Temperature

December brings the lowest temperatures, with an average high of 26.6°F (-3°C) and an average low of 14.9°F (-9.5°C).

Humidity

In Rexburg, the average relative humidity in December is 87%.

Rainfall

In Rexburg, during December, the rain falls for 9.3 days and regularly aggregates up to 0.87" (22mm) of precipitation. In Rexburg, during the entire year, the rain falls for 120.3 days and collects up to 11.02" (280mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In Rexburg, in December, snow falls for 17.6 days, with typically accumulated 6.38" (162mm) of snow. Throughout the year, there are 84.8 snowfall days, and 31.85" (809mm) of snow is accumulated.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:42 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 4:59 pm MST.

Sunshine

The average sunshine in December is 5.1h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index, 1 during December, leads to the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.

Frequently asked questions

What is the coldest time of year?

Rexburg's December weather, marked by an average high temperature of 26.6°F (-3°C) and an average low temperature of 14.9°F (-9.5°C), is the coldest in the year.

How cold is December?

During December, Rexburg experiences an average high-temperature of 26.6°F (-3°C) and a low-temperature of 14.9°F (-9.5°C). In July, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 84.2°F (29°C).

What is the average humidity in December?

The average relative humidity in December is 87%.

How much does it rain in Rexburg in December?

In Rexburg, in December, during 9.3 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

How much does it snow in December?

In Rexburg, during December, snow falls for 17.6 days and regularly aggregates up to 6.38" (162mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 0min of daylight.

How many hours of daylight does Rexburg have in December?

The average day length in December is 8h and 59min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:42 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 4:59 pm MST.

How many hours of sunshine does Rexburg have in December?

In December, the average sunshine duration in Rexburg, Idaho, is 5.1h.

When is the lowest UV index?

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in December?

The average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal hazard to health from 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
Rexburg, ID

Average temperature in December - Rexburg, ID
  • Average high temperature in December: 26.6°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is December (26.6°F).

  • Average low temperature in December: 14.9°F

The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).

Average pressure in December
Rexburg, ID

Average pressure in December - Rexburg, ID
  • Average pressure in December: 30.26"Hg

The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Rexburg, ID

Average wind speed in December - Rexburg, ID
  • Average wind speed in December: 4.5mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).

Average humidity in December
Rexburg, ID

Average humidity in December - Rexburg, ID
  • Average humidity in December: 87%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (38%).

Average rainfall in December
Rexburg, ID

Average rainfall in December - Rexburg, ID
  • Average rainfall in December: 0.87"

The wettest months (with the highest rainfall) are April and May (1.26").
The driest month (with the least rainfall) is July (0.39").

Average rainfall days in December
Rexburg, ID

Average rainfall days in December - Rexburg, ID
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is July (6.3 days).

Average snowfall in December
Rexburg, ID

Average snowfall in December - Rexburg, ID
  • Average snowfall in December: 6.38"

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

Average snowfall days in December
Rexburg, ID

Average snowfall days in December - Rexburg, ID
  • Average snowfall days in December: 17.6 days

The months with the highest number of snowfall days are January and February (18.1 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in December /
Average sunshine in December
Rexburg, ID

Average daylight in December / Average sunshine in December - Rexburg, ID
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in December
Rexburg, ID

Average sunshine days in December - Rexburg, ID
  • Average sunshine days in December: 11.4 days

The month with the most sunshine days is July (20.6 days).
The month with the least sunshine days is February (8.8 days).

Average UV index in December
Rexburg, ID

Average UV index in December - Rexburg, ID
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Rexburg, ID

Average cloud cover in December - Rexburg, ID
  • Average cloud cover in December: 50

The months with the most cloud cover are January and February (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 11).

Average visibility in December
Rexburg, ID

Average visibility in December - Rexburg, ID
  • Average visibility in December: 4mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).

Rexburg, Idaho, USA

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