December weather forecastCornish, UT
December
Weather in December
December, the first month of the winter in Cornish, is still a freezing cold month, with temperature in the range of an average high of 28.6°F (-1.9°C) and an average low of 15.1°F (-9.4°C).Temperature
Temperature records mark December as the coldest month, with highs averaging 28.6°F (-1.9°C) and lows at 15.1°F (-9.4°C).Humidity
The average relative humidity in December is 86%.Rainfall
In Cornish, in December, during 8.2 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Cornish, during the entire year, the rain falls for 117.9 days and collects up to 17.68" (449mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Cornish, during December, snow falls for 15.1 days and regularly aggregates up to 11.73" (298mm) of snow. In Cornish, during the entire year, snow falls for 71.1 days and aggregates up to 56.1" (1425mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:36 am and sunset at 4:57 pm. On the last day of December, sunrise is at 7:55 am and sunset at 5:06 pm MST.
Sunshine
The average sunshine in December is 5.2h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The daily maximum UV index of 1 in December interprets into the following advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cornish, UT
- Average high temperature in December: 28.6°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 (28.6°F).
- Average low temperature in December: 15.1°F
The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in December
Cornish, UT
- Average pressure in December: 30.25"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Cornish, UT
- Average wind speed in December: 4.3mph
The windiest months (with the highest average wind speed) are April, June and August (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in December
Cornish, UT
- Average humidity in December: 86%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall in December
Cornish, UT
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is January (2.24").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in December
Cornish, UT
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is November (6.7 days).
Average snowfall in December
Cornish, UT
- Average snowfall in December: 11.73"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Cornish, UT
- Average snowfall days in December: 15.1 days
The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Cornish, UT
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 5h and 12min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Cornish, UT
- Average sunshine days in December: 13.5 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in December
Cornish, UT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Cornish, UT
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in December
Cornish, UT
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
