December weather forecastGrover, WY
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Grover, Wyoming, with an average temperature ranging between max 24.1°F (-4.4°C) and min 6.6°F (-14.1°C).Temperature
December, marked by an average high-temperature of 24.1°F (-4.4°C) and a low-temperature of 6.6°F (-14.1°C), is the coldest month.Humidity
In Grover, the average relative humidity in December is 90%.Rainfall
In Grover, Wyoming, during December, the rain falls for 6.2 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Grover, during the entire year, the rain falls for 109.5 days and collects up to 21.61" (549mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Grover, Wyoming, in December, snow falls for 21.7 days, with typically accumulated 15.51" (394mm) of snow. Throughout the year, there are 126.9 snowfall days, and 106.65" (2709mm) 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, sunrise is at 7:35 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:54 am and sunset at 4:59 pm MST.
Sunshine
The average sunshine in December in Grover, Wyoming, is 4.8h.UV index
The months with the lowest UV index in Grover are January through March, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, an average UV index of 1 transforms into the following instructions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Grover, WY
- Average high temperature in December: 24.1°F
The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is December (24.1°F).
- Average low temperature in December: 6.6°F
The month with the highest average low temperature is July (45.7°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in December
Grover, WY
- 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 (29.91"Hg).
Average wind speed in December
Grover, WY
- Average wind speed in December: 4.2mph
The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest months (with the lowest average wind speed) are January and December (4.2mph).
Average humidity in December
Grover, WY
- Average humidity in December: 90%
The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is August (45%).
Average rainfall in December
Grover, WY
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is February (2.72").
The driest months (with the least rainfall) are July and August (0.63").
Average rainfall days in December
Grover, WY
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in December
Grover, WY
- Average snowfall in December: 15.51"
The month with the highest snowfall is February (19.96").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Grover, WY
- Average snowfall days in December: 21.7 days
The month with the highest number of snowfall days is December (21.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Grover, 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: 4h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Grover, WY
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is July (18.8 days).
The month with the least sunshine days is April (7 days).
Average UV index in December
Grover, WY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in December
Grover, WY
- Average cloud cover in December: 55
The month with the most cloud cover is February (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in December
Grover, WY
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
