Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December is the coldest month, exhibiting average temperatures of 26.4°F (-3.1°C) at the peak and 13.1°F (-10.5°C) at the base.Humidity
The average relative humidity in December in Hanna is 81%.Rainfall
In Hanna, during December, the rain falls for 4.5 days and regularly aggregates up to 0.55" (14mm) of precipitation. In Hanna, Wyoming, during the entire year, the rain falls for 80.5 days and collects up to 8.39" (213mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Hanna, in December, during 11.5 snowfall days, 3.78" (96mm) of snow is typically accumulated. Throughout the year, there are 70.3 snowfall days, and 29.57" (751mm) of snow is accumulated.Daylight
December has the shortest days of the year in Hanna, with an average of 9h and 12min of daylight.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, in Hanna, sunrise is at 7:33 am and sunset at 4:45 pm MST.
Sunshine
February and December, with an average of 5.9h of sunshine, are months with the least sunshine in Hanna.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 2 during December translates into these guidelines:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
What is the coldest time of year in Hanna?
How cold is it in Hanna in December?
What is the average humidity in December in Hanna?
How many days does it rain in December in Hanna?
How many days does it snow in December in Hanna?
What is the month with the shortest days in Hanna?
How many hours of daylight does Hanna have in December?
What time are sunrise and sunset in December in Hanna?
What is the month with the least sunshine in Hanna?
How many hours of sunshine does Hanna have in December?
When is the lowest UV index in Hanna?
How high is the UV index in December in Hanna?
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 1min
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 5min
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).
Hanna, Wyoming, USA
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