December weather forecast
American Fork, UT

Weather in December

The first month of the winter, December, is still a cold month in American Fork, Utah, with an average temperature varying between 32.4°F (0.2°C) and 17.2°F (-8.2°C).

Temperature

The coldest months are January and December, with an average high-temperature of 32.4°F (0.2°C).

Humidity

In American Fork, the average relative humidity in December is 81%.

Rainfall

The months with the most rainfall in American Fork are April and December, with an average 1.93" (49mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In American Fork, in December, snow falls for 13 days, with typically accumulated 10.16" (258mm) of snow. In American Fork, during the entire year, snow falls for 58.5 days and aggregates up to 44.49" (1130mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 21min of daylight.
On the first day of December, sunrise is at 7:30 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 5:10 pm MST.

Sunshine

The average sunshine in December is 5.7h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 1 in December transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What are the coldest months in American Fork?

January and December, with an average high-temperature of 32.4°F (0.2°C), are the coldest months.

What is the temperature in December in American Fork?

The average high-temperature, in December, in American Fork, Utah, is 32.4°F (0.2°C), while the average low-temperature is 17.2°F (-8.2°C).

What is the average humidity in December in American Fork?

In December, the average relative humidity in American Fork, Utah, is 81%.

What is the wettest month in American Fork?

The wettest months in American Fork, Utah, are April and December, with an average 1.93" (49mm) of rainfall.

How many days does it rain in December in American Fork?

In American Fork, in December, during 10.2 rainfall days, 1.93" (49mm) of precipitation is typically accumulated.

How much does it snow in American Fork in December?

In American Fork, Utah, in December, snow falls for 13 days, with typically accumulated 10.16" (258mm) of snow.

What is the month with the shortest days in American Fork?

The month with the shortest days in American Fork, Utah, is December, with an average of 9h and 21min of daylight.

How many hours of daylight does American Fork have in December?

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

What time are sunrise and sunset in December in American Fork?

On the first day of December in American Fork, Utah, sunrise is at 7:30 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 5:10 pm MST.

How many hours of sunshine does American Fork have in December?

The average sunshine duration in December in American Fork is 5.7h.

What is the month with the lowest UV index in American Fork?

December is the month with the lowest UV index in American Fork, with an average maximum UV index of 1.

What is the UV index intensity in December in American Fork?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a low health threat 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
American Fork, UT

Average temperature in December - American Fork, UT
  • Average high temperature in December: 32.4°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The months with the lowest average high temperature are January and December (32.4°F).

  • Average low temperature in December: 17.2°F

The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).

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Average pressure in December
American Fork, UT

Average pressure in December - American Fork, UT
  • Average pressure in December: 30.21"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in December
American Fork, UT

Average wind speed in December - American Fork, UT
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is January (4.6mph).

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Average humidity in December
American Fork, UT

Average humidity in December - American Fork, UT
  • Average humidity in December: 81%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is July (38%).

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Average rainfall in December
American Fork, UT

Average rainfall in December - American Fork, UT
  • Average rainfall in December: 1.93"

The wettest months (with the highest rainfall) are April and December (1.93").
The driest month (with the least rainfall) is June (0.75").

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Average rainfall days in December
American Fork, UT

Average rainfall days in December - American Fork, UT
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is May (14.3 days).
The months with the least rainy days are June and November (7.3 days).

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Average snowfall in December
American Fork, UT

Average snowfall in December - American Fork, UT
  • Average snowfall in December: 10.16"

The month with the highest snowfall is January (11.06").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
American Fork, UT

Average snowfall days in December - American Fork, UT
  • Average snowfall days in December: 13 days

The month with the highest number of snowfall days is December (13 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
American Fork, UT

Average daylight in December / Average sunshine in December - American Fork, UT
  • Average daylight in December: 9h and 21min

The month with the longest days is June (Average daylight: 15h and 1min).
The month with the shortest days is December (Average daylight: 9h and 21min).

  • Average sunshine in December: 5h and 42min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

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Average sunshine days in December
American Fork, UT

Average sunshine days in December - American Fork, UT
  • Average sunshine days in December: 13.9 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is February (11.4 days).

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Average UV index in December
American Fork, UT

Average UV index in December - American Fork, UT
  • Average UV index in December: 1

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

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Average cloud cover in December
American Fork, UT

Average cloud cover in December - American Fork, UT
  • Average cloud cover in December: 40

The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 10).

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Average visibility in December
American Fork, UT

Average visibility in December - American Fork, UT
  • Average visibility in December: 5mi

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

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