December weather forecastRalston, WY
December
Weather in December
December, the first month of the winter in Ralston, is also a subzero cold month, with temperature in the range of an average low of 15.6°F (-9.1°C) and an average high of 29.7°F (-1.3°C).Temperature
In Ralston, the lowest average temperatures are observed in December, with a high of 29.7°F (-1.3°C) and a low of 15.6°F (-9.1°C).Humidity
In December, the average relative humidity is 74%.Rainfall
In Ralston, during December, the rain falls for 4.9 days and regularly aggregates up to 0.35" (9mm) of precipitation. Throughout the year, there are 105.7 rainfall days, and 8.19" (208mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In Ralston, in December, snow falls for 7.5 days, with typically accumulated 2.01" (51mm) of snow. In Ralston, during the entire year, snow falls for 52.1 days and aggregates up to 16.97" (431mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:33 am and sunset at 4:36 pm. On the last day of December, in Ralston, sunrise is at 7:52 am and sunset at 4:45 pm MST.
Sunshine
January, February and December, with an average of 6.7h 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. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 during December leads to these advisories:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ralston, WY
- Average high temperature in December: 29.7°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in December: 15.6°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (15.6°F).
Average pressure in December
Ralston, WY
- Average pressure in December: 30.16"Hg
The months with the highest atmospheric pressure are January and December (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Ralston, WY
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Ralston, WY
- Average humidity in December: 74%
The month with the highest relative humidity is January (76%).
The months with the lowest relative humidity are July and August (37%).
Average rainfall in December
Ralston, WY
- Average rainfall in December: 0.35"
The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in December
Ralston, WY
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is December (4.9 days).
Average snowfall in December
Ralston, WY
- Average snowfall in December: 2.01"
The month with the highest snowfall is February (3.9").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Ralston, WY
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is February (11 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Ralston, WY
- Average daylight in December: 8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 6h and 42min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 42min).
Average sunshine days in December
Ralston, WY
- Average sunshine days in December: 21.7 days
The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
Ralston, WY
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Ralston, WY
- Average cloud cover in December: 28
The month with the most cloud cover is February (Cloud cover 32).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in December
Ralston, WY
- 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).
