December weather forecastHanna, WY
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Hanna, Wyoming, with temperature in the range of an average low of 13.1°F (-10.5°C) and an average high of 26.4°F (-3.1°C).Temperature
December is Hanna's coldest month, registering average high temperatures of 26.4°F (-3.1°C) and lows of 13.1°F (-10.5°C).Humidity
The average relative humidity in December is 81%.Rainfall
In Hanna, in December, it is raining for 4.5 days, with typically 0.55" (14mm) of accumulated precipitation. In Hanna, during the entire year, the rain falls for 80.5 days and collects up to 8.39" (213mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Hanna, Wyoming, during December, snow falls for 11.5 days and regularly aggregates up to 3.78" (96mm) of snow. In Hanna, during the entire year, snow falls for 70.3 days and aggregates up to 29.57" (751mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:15 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:33 am and sunset at 4:45 pm MST.
Sunshine
The months with the least sunshine are February and December, with an average of 5.9h of sunshine.UV index
January through April, October through 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 average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. It's recommended to limit sun exposure when its radiation is at its peak during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Take careful note! The UV radiation of the Sun 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
Hanna, WY
- Average high temperature in December: 26.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (26.4°F).
- Average low temperature in December: 13.1°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).
Average pressure in December
Hanna, WY
- Average pressure in December: 30.19"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Hanna, WY
- Average wind speed in December: 11.7mph
The windiest month (with the highest average wind speed) is November (12.4mph).
The calmest months (with the lowest average wind speed) are July and August (9.3mph).
Average humidity in December
Hanna, WY
- Average humidity in December: 81%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (34%).
Average rainfall in December
Hanna, WY
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is April (1.34").
The driest month (with the least rainfall) is August (0.24").
Average rainfall days in December
Hanna, WY
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Hanna, WY
- Average snowfall in December: 3.78"
The month with the highest snowfall is March (5.47").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Hanna, WY
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is February (12.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Hanna, WY
- 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 54min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 5h and 54min).
Average sunshine days in December
Hanna, WY
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is August (23.6 days).
The month with the least sunshine days is April (12.6 days).
Average UV index in December
Hanna, WY
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
Hanna, WY
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in December
Hanna, WY
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).
