December weather forecast
Alton, UT

Weather in December

December, the first month of the winter, in Alton, is also a wintry month, with average temperature fluctuating between 17.2°F (-8.2°C) and 32.9°F (0.5°C).

Temperature

The coldest month is December, with an average high-temperature of 32.9°F (0.5°C) and an average low-temperature of 17.2°F (-8.2°C).

Humidity

In December, the average relative humidity in Alton is 75%.

Rainfall

In Alton, during 3.9 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. Throughout the year, there are 84.8 rainfall days, and 22.05" (560mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Alton are January through May, September through December. December is the month with the most snowfall. Snow falls for 12.5 days and accumulates 14.06" (357mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9.6h of daylight.

Sunshine

January and December, with an average of 5.8h of sunshine, are months with the least sunshine.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Alton. A UV Index value of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. 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. 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 Alton?

With an average high-temperature of 32.9°F (0.5°C) and an average low-temperature of 17.2°F (-8.2°C), December is the coldest month.

What is the average humidity in December in Alton?

In Alton, the average relative humidity in December is 75%.

How many days does it rain in December in Alton?

In December, in Alton, the rain falls for 3.9 days. Throughout December, 1.81" (46mm) of precipitation is accumulated.

When does it snow the most in Alton?

The month with the most snowfall in Alton is December when snow falls for 12.5 days and typically aggregates up to 14.06" (357mm) of snow.

How many days does it snow in December in Alton?

In December, it is snowing for 12.5 days. Throughout December, 14.06" (357mm) of snow is accumulated.

What is the month with the shortest days in Alton?

December has the shortest days of the year in Alton, Utah, with an average of 9.6h of daylight.

How many hours of daylight does Alton have in December?

In Alton, the average length of the day in December is 9.6h.

What is the month with the least sunshine in Alton?

January and December, with an average of 5.8h of sunshine, are months with the least sunshine in Alton.

How long on average sun shines in December in Alton?

In Alton, Utah, the average sunshine in December is 5.8h.

What is the month with the lowest UV index in Alton?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Alton.

What is the UV index intensity in December in Alton?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays.

Average temperature in December
Alton, UT

Average temperature in December - Alton, UT
  • Average high temperature in December: 32.9°F

The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is December (32.9°F).

  • Average low temperature in December: 17.2°F

The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is December (17.2°F).

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Average pressure in December
Alton, UT

Average pressure in December - Alton, UT
  • Average pressure in December: 30.15"

The month with the highest atmospheric pressure is January (30.2").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed in December
Alton, UT

Average wind speed in December - Alton, UT
  • Average wind speed in December: 6.9mph

The windiest month (with the highest average wind speed) is April (9mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

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Average humidity in December
Alton, UT

Average humidity in December - Alton, UT
  • Average humidity in December: 75%

The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is June (29%).

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Average rainfall in December
Alton, UT

Average rainfall in December - Alton, UT
  • Average rainfall in December: 1.81"

The wettest month (with the highest rainfall) is July (3.98").
The driest month (with the least rainfall) is June (0.39").

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Average rainfall days in December
Alton, UT

Average rainfall days in December - Alton, UT
  • Average rainfall days in December: 3.9 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall in December
Alton, UT

Average snowfall in December - Alton, UT
  • Average snowfall in December: 14.06"

The month with the highest snowfall is December (14.06").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Alton, UT

Average snowfall days in December - Alton, UT
  • Average snowfall days in December: 12.5 days

The month with the highest number of snowfall days is December (12.5 days).
Months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Alton, UT
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 5.8h

The month with the most sunshine is June (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.8).

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Average sunshine days in December
Alton, UT

Average sunshine days in December - Alton, UT
  • Average sunshine days in December: 17.9 days

The month with the most sunshine days is June (23.4 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in December
Alton, UT

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

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in December
Alton, UT

Average cloud cover in December - Alton, UT
  • Average cloud cover in December: 38

Months with the most cloud cover are February and December (Cloud cover 38).
The month with the least cloud cover is June (Cloud cover 10).

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Average visibility in December
Alton, UT

Average visibility in December - Alton, UT
  • Average visibility in December: 5mi

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

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