December weather forecastAlva, WY
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Alva, Wyoming, with an average temperature fluctuating between 18.1°F (-7.7°C) and 30.4°F (-0.9°C).Temperature
The coldest time of the year is December, with temperatures averaging a high of 30.4°F (-0.9°C) and a low of 18.1°F (-7.7°C).Humidity
In December, the average relative humidity is 78%.Rainfall
In Alva, in December, it is raining for 3.5 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, in Alva, there are 99.9 rainfall days, and 12.99" (330mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Alva. In Alva, in December, during 9.4 snowfall days, 2.95" (75mm) of snow is typically accumulated. Throughout the year, in Alva, there are 52.1 snowfall days, and 23.46" (596mm) of snow is accumulated.Daylight
December has the shortest days of the year in Alva, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:15 am and sunset at 4:18 pm. On the last day of December, in Alva, sunrise is at 7:34 am and sunset at 4:27 pm MST.
Sunshine
The average sunshine in December is 5.6h.UV index
The months with the lowest UV index in Alva are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Alva, WY
- Average high temperature in December: 30.4°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is December (30.4°F).
- Average low temperature in December: 18.1°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is February (17.1°F).
Average pressure in December
Alva, WY
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Alva, WY
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January and October (10.4mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in December
Alva, WY
- Average humidity in December: 78%
The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are August and September (47%).
Average rainfall in December
Alva, WY
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Alva, WY
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in December
Alva, WY
- Average snowfall in December: 2.95"
The month with the highest snowfall is April (4.88").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Alva, WY
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Alva, 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: 5h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in December
Alva, WY
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is April (12.6 days).
Average UV index in December
Alva, WY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Alva, WY
- Average cloud cover in December: 40
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Alva, 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).
