December weather forecastGlenrock, WY
December
Weather in December
As the final month of the year, December brings Glenrock, Wyoming, full circle back to winter's peak. Temperatures plunge further, hovering from 16.2°F (-8.8°C) to 29.3°F (-1.5°C), while daylight hours are at their minimum of 9.1 hours. In mirroring January's weather, snowfall continues to be significant, approaching 4.61" (117mm), effectively turning the city into a winter wonderland. Despite the harsh cold, the sight of snow-clad landscapes under the pale winter sun offers a quaint charm. December's severe weather conditions, marked by considerable snowfall and limited daylight, round off the year on a starkly cold yet visually stunning note.Temperature
December is the coldest month, exhibiting average temperatures of 29.3°F (-1.5°C) at the peak and 16.2°F (-8.8°C) at the base.Humidity
The average relative humidity in December is 75%.Rainfall
In Glenrock, in December, during 4.9 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Glenrock, during the entire year, the rain falls for 101.1 days and collects up to 11.54" (293mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Glenrock, in December, snow falls for 11 days, with typically accumulated 4.61" (117mm) of snow. Throughout the year, there are 65.9 snowfall days, and 33.03" (839mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December in Glenrock, sunrise is at 7:15 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:39 pm MST.
Sunshine
In December, the average sunshine is 6.3h.UV index
The months with the lowest UV index are January, February, April, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the UV index of 2 transforms into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Glenrock, WY
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (29.3°F).
- Average low temperature in December: 16.2°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).
Average pressure in December
Glenrock, WY
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Glenrock, WY
- Average wind speed in December: 12.5mph
The windiest month (with the highest average wind speed) is January (13mph).
The calmest months (with the lowest average wind speed) are July and August (8.8mph).
Average humidity in December
Glenrock, WY
- Average humidity in December: 75%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
Glenrock, WY
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Glenrock, WY
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is May (14.8 days).
The months with the least rainy days are January and December (4.9 days).
Average snowfall in December
Glenrock, WY
- Average snowfall in December: 4.61"
The month with the highest snowfall is November (4.84").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Glenrock, WY
- Average snowfall days in December: 11 days
The month with the highest number of snowfall days is February (11.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Glenrock, 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 18min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in December
Glenrock, WY
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (18.9 days).
The months with the least sunshine days are April and May (11.3 days).
Average UV index in December
Glenrock, WY
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, April, October, November and December (UV index 2).
Average cloud cover in December
Glenrock, WY
- Average cloud cover in December: 33
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in December
Glenrock, 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).
