December weather forecastSaint Stephens, WY
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Saint Stephens, Wyoming, with temperature in the range of an average high of 30.9°F (-0.6°C) and an average low of 14.7°F (-9.6°C).Temperature
With average high and low temperatures of 30.9°F (-0.6°C) and 14.7°F (-9.6°C) respectively, December is Saint Stephens's coldest month.Humidity
The average relative humidity in December in Saint Stephens is 72%.Rainfall
In Saint Stephens, in December, it is raining for 3.1 days, with typically 0.31" (8mm) of accumulated precipitation. Throughout the year, there are 67.3 rainfall days, and 6.93" (176mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Saint Stephens. In Saint Stephens, during December, snow falls for 6.7 days and regularly aggregates up to 2.24" (57mm) of snow. In Saint Stephens, during the entire year, snow falls for 42.8 days and aggregates up to 25.47" (647mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:44 am and sunset at 4:49 pm MST.
Sunshine
In December, the average sunshine is 6.7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Saint Stephens. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during December translates into the following guidance:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. 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
Saint Stephens, WY
- Average high temperature in December: 30.9°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (30.9°F).
- Average low temperature in December: 14.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in December
Saint Stephens, WY
- Average pressure in December: 30.2"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Saint Stephens, WY
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).
Average humidity in December
Saint Stephens, WY
- Average humidity in December: 72%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in December
Saint Stephens, WY
- Average rainfall in December: 0.31"
The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in December
Saint Stephens, WY
- Average rainfall days in December: 3.1 days
The month with the highest number of rainy days is May (9.9 days).
The month with the least rainy days is January (2.5 days).
Average snowfall in December
Saint Stephens, WY
- Average snowfall in December: 2.24"
The month with the highest snowfall is April (5.39").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Saint Stephens, WY
- Average snowfall days in December: 6.7 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Saint Stephens, WY
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 6h and 42min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 36min).
Average sunshine days in December
Saint Stephens, WY
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is April (15.5 days).
Average UV index in December
Saint Stephens, WY
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Saint Stephens, WY
- Average cloud cover in December: 26
The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in December
Saint Stephens, 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).
