December weather forecast and climate
American Fork, UT

Weather in December

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

Temperature

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

Humidity

The average relative humidity in American Fork is 81%.

Rainfall

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

Snowfall

January through May, October through December are months with snowfall. In December, in American Fork, it is snowing for 13 days. Throughout December, 10.16" (258mm) of snow is accumulated. 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 9.3h of daylight.

Sunshine

In American Fork, the average sunshine is 5.7h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 1 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in American Fork?

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

What is the temperature in December in American Fork?

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

What is the average humidity in December in American Fork?

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

How much does it rain in American Fork in December?

In American Fork, Utah, in December, it is raining for 10.2 days, with typically 1.93" (49mm) of accumulated precipitation.

What is the rainiest 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 snow in December in American Fork?

In American Fork, Utah, during December, snow falls for 13 days and regularly aggregates up to 10.16" (258mm) of snow.

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

With an average of 9.3h of daylight, December has the shortest days of the year.

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

In December, the average length of the day is 9.3h.

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

In American Fork, Utah, the average sunshine in December is 5.7h.

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

The month with the lowest UV index is December, with an average maximum UV index of 1.

What is the UV index reading 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 risk from unprotected exposure to the UV radiation.

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).
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"

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

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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).
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").
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).
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: 9.3h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 5.7h

The month with the most sunshine is August (Average sunshine: 11.9h).
The month with the least sunshine is January (Average sunshine: 5.4h).

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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

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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