December weather forecastFort Johnson, UT
December
Weather in December
December, the first month of the winter in Fort Johnson, is also an icy month, with temperature in the range of an average low of 20.8°F (-6.2°C) and an average high of 36.5°F (2.5°C).Temperature
Fort Johnson's coldest weather arrives in December, when temperatures average a high of 36.5°F (2.5°C) and a low of 20.8°F (-6.2°C).Humidity
In December, the average relative humidity is 73%.Rainfall
In Fort Johnson, in December, it is raining for 5.6 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 84.2 rainfall days, and 9.21" (234mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. December is the month with the most snowfall. Snow falls for 8.1 days and accumulates 4.25" (108mm) 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 7:29 am and sunset at 5:13 pm. On the last day of December, sunrise is at 7:47 am and sunset at 5:23 pm MST.
Sunshine
In Fort Johnson, Utah, the average sunshine in December is 6.5h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fort Johnson, UT
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in December: 20.8°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is December (20.8°F).
Average pressure in December
Fort Johnson, UT
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Fort Johnson, UT
- Average wind speed in December: 6.4mph
The windiest month (with the highest average wind speed) is June (8.5mph).
The calmest month (with the lowest average wind speed) is January (6.2mph).
Average humidity in December
Fort Johnson, UT
- Average humidity in December: 73%
The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is June (26%).
Average rainfall in December
Fort Johnson, UT
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is July (1.81").
The driest month (with the least rainfall) is June (0.24").
Average rainfall days in December
Fort Johnson, UT
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is July (14.2 days).
The month with the least rainy days is November (3.2 days).
Average snowfall in December
Fort Johnson, UT
- Average snowfall in December: 4.25"
The month with the highest snowfall is December (4.25").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Fort Johnson, UT
- Average snowfall days in December: 8.1 days
The month with the highest number of snowfall days is December (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fort Johnson, UT
- Average daylight in December: 9h and 36min
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: 6h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).
Average sunshine days in December
Fort Johnson, UT
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is June (24 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in December
Fort Johnson, UT
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Fort Johnson, UT
- Average cloud cover in December: 31
The month with the most cloud cover is December (Cloud cover 31).
The month with the least cloud cover is June (Cloud cover 8).
Average visibility in December
Fort Johnson, UT
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
