Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
With its high average temperature of 32.9°F (0.5°C) and a low of 17.2°F (-8.2°C), December is regarded as the coldest month.Humidity
In December, the average relative humidity is 75%.Rainfall
In Alton, during December, the rain falls for 3.9 days and regularly aggregates up to 1.81" (46mm) of precipitation. In Alton, during the entire year, the rain falls for 84.8 days and collects up to 22.05" (560mm) of precipitation.Snowfall
Months with snowfall 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 9h and 36min of daylight.On the first day of the month, sunrise is at 7:26 am and sunset at 5:12 pm. On the last day of December, sunrise is at 7:44 am and sunset at 5:22 pm MST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.8h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, a daily UV index of 2 turns into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Boost your sun resistance with garments that are densely woven yet spacious. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December in Alton?
When does it snow the most?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Alton have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
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).
Average pressure in December
Alton, UT
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
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).
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%).
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").
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).
Average snowfall in December
Alton, UT
- Average snowfall in December: 14.06"
The month with the highest snowfall is December (14.06").
The months with the least snowfall are June, July and August (0").
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).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Alton, UT
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
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).
Average UV index in December
Alton, UT
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Alton, UT
- Average cloud cover in December: 38
The 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).
Average visibility in December
Alton, 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 months with the lowest visibility are January, February and December (5mi).
Alton, Utah, USA
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