December weather forecastDayton, WY
December
Weather in December
December, the first month of the winter in Dayton, is still a freezing cold month, with an average temperature varying between 29.3°F (-1.5°C) and 15.3°F (-9.3°C).Temperature
December shows a mild decline in the average high-temperature, falling from November's icy 39.7°F (4.3°C) to a subzero cold 29.3°F (-1.5°C). December's nights observe an average temperature of 15.3°F (-9.3°C).Humidity
The average relative humidity in December in Dayton, Wyoming, is 73%.Rainfall
December is the month with the least rainfall in Dayton. Rain falls for 7.8 days and accumulates 0.75" (19mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Dayton, in December, snow falls for 13.6 days, with typically accumulated 4.41" (112mm) of snow. In Dayton, during the entire year, snow falls for 78.9 days and aggregates up to 46.3" (1176mm) of snow.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:27 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:46 am and sunset at 4:38 pm MST.
Sunshine
In Dayton, the average sunshine in December is 6.5h.UV index
The months with the lowest UV index in Dayton 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 low health risk from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dayton, WY
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is February (29.1°F).
- Average low temperature in December: 15.3°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in December
Dayton, WY
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Dayton, WY
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Dayton, WY
- Average humidity in December: 73%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (46%).
Average rainfall in December
Dayton, WY
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days in December
Dayton, WY
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in December
Dayton, WY
- Average snowfall in December: 4.41"
The month with the highest snowfall is April (8.7").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Dayton, WY
- Average snowfall days in December: 13.6 days
The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Dayton, WY
- Average daylight in December: 8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 6h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).
Average sunshine days in December
Dayton, WY
- Average sunshine days in December: 14.2 days
The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is May (5.8 days).
Average UV index in December
Dayton, 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
Dayton, WY
- Average cloud cover in December: 33
The months with the most cloud cover are February and April (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in December
Dayton, 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).
