December weather forecast
Altonah, UT

Share

Weather in December

December, the first month of the winter in Altonah, is also a subzero cold month, with an average temperature ranging between min 9.3°F (-12.6°C) and max 25.7°F (-3.5°C).

Temperature

December tends to be the coldest month, with temperatures averaging a daily high of 25.7°F (-3.5°C) and a low of 9.3°F (-12.6°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Altonah, in December, during 5.7 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. Throughout the year, there are 98.4 rainfall days, and 11.54" (293mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. In December, it is snowing for 11.6 days. Throughout December, 5" (127mm) of snow is accumulated. Throughout the year, in Altonah, there are 87 snowfall days, and 51.73" (1314mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:55 pm. On the last day of December, sunrise is at 7:44 am and sunset at 5:04 pm MST.

Sunshine

The average sunshine in December is 6.4h.

UV index

January through April, October through 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 average individuals.
Note: In December, the maximum UV index of 2 suggests these recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. To cut down UV radiation exposure by about half, sport a wide-brim hat. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

The coldest time of the year is December, with temperatures averaging a high of 25.7°F (-3.5°C) and a low of 9.3°F (-12.6°C).

How cold is December?

Altonah in December has an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 9.3°F (-12.6°C).

What is the average humidity in December?

In December, the average relative humidity is 78%.

How many days does it rain in December?

In December, the rain falls for 5.7 days. Throughout December, 0.59" (15mm) of precipitation is accumulated.

How much does it snow in December?

In Altonah, in December, snow falls for 11.6 days, with typically accumulated 5" (127mm) of snow.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

How many hours of daylight does Altonah have in December?

In December, the average day length is 9h and 21min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:25 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:04 pm MST.

How many hours of sunshine does Altonah have in December?

The average sunshine duration in December is 6.4h.

What is the month with the lowest UV index?

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December?

In Altonah, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's 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
Altonah, UT

Average temperature in December - Altonah, UT
  • Average high temperature in December: 25.7°F

The warmest month (with the highest average high temperature) is July (73°F).
The month with the lowest average high temperature is December (25.7°F).

  • Average low temperature in December: 9.3°F

The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (8.6°F).

Average pressure in December
Altonah, UT

Average pressure in December - Altonah, UT
  • Average pressure in December: 30.22"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in December
Altonah, UT

Average wind speed in December - Altonah, UT
  • Average wind speed in December: 6.2mph

The windiest month (with the highest average wind speed) is June (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in December
Altonah, UT

Average humidity in December - Altonah, UT
  • Average humidity in December: 78%

The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are June and July (44%).

Average rainfall in December
Altonah, UT

Average rainfall in December - Altonah, UT
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is January (0.43").

Average rainfall days in December
Altonah, UT

Average rainfall days in December - Altonah, UT
  • Average rainfall days in December: 5.7 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is November (3.4 days).

Average snowfall in December
Altonah, UT

Average snowfall in December - Altonah, UT
  • Average snowfall in December: 5"

The month with the highest snowfall is March (10.24").
The months with the least snowfall are July and August (0").

Average snowfall days in December
Altonah, UT

Average snowfall days in December - Altonah, UT
  • Average snowfall days in December: 11.6 days

The month with the highest number of snowfall days is March (13.1 days).
The month with the least snowfall days is July (0 days).

Average daylight in December /
Average sunshine in December
Altonah, UT

Average daylight in December / Average sunshine in December - Altonah, UT
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 6h and 12min).

Average sunshine days in December
Altonah, UT

Average sunshine days in December - Altonah, UT
  • Average sunshine days in December: 18.6 days

The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is July (10.9 days).

Average UV index in December
Altonah, UT

Average UV index in December - Altonah, UT
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in December
Altonah, UT

Average cloud cover in December - Altonah, UT
  • Average cloud cover in December: 33

The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 13).

Average visibility in December
Altonah, UT

Average visibility in December - Altonah, UT
  • Average visibility in December: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

Altonah, Utah, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location