December weather forecastRiner, WY
December
Weather in December
December, the first month of the winter in Riner, is still a freezing cold month, with an average temperature ranging between max 26.4°F (-3.1°C) and min 13.5°F (-10.3°C).Temperature
Riner's temperature records reveal December as the coldest month, marked by average highs of 26.4°F (-3.1°C) and lows of 13.5°F (-10.3°C).Humidity
The average relative humidity in December in Riner is 81%.Rainfall
In December, in Riner, the rain falls for 4.6 days. Throughout December, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 81.7 rainfall days, and 9.72" (247mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Riner, in December, during 13.6 snowfall days, 4.76" (121mm) of snow is typically accumulated. Throughout the year, in Riner, there are 80.6 snowfall days, and 33.39" (848mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:18 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:37 am and sunset at 4:49 pm MST.
Sunshine
In Riner, the average sunshine in December is 5.9h.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Riner. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. When the Sun is at its strongest around midday, find shade and limit exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Riner, WY
- Average high temperature in December: 26.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is December (26.4°F).
- Average low temperature in December: 13.5°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in December
Riner, WY
- Average pressure in December: 30.2"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Riner, WY
- Average wind speed in December: 12.6mph
The windiest month (with the highest average wind speed) is November (13.2mph).
The calmest months (with the lowest average wind speed) are July and August (9.5mph).
Average humidity in December
Riner, WY
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are July and August (35%).
Average rainfall in December
Riner, WY
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is April (1.42").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in December
Riner, WY
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is May (11.7 days).
The month with the least rainy days is November (3.2 days).
Average snowfall in December
Riner, WY
- Average snowfall in December: 4.76"
The month with the highest snowfall is April (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Riner, WY
- Average snowfall days in December: 13.6 days
The month with the highest number of snowfall days is February (14.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Riner, 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 month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in December
Riner, WY
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is June (21.1 days).
The month with the least sunshine days is February (11.2 days).
Average UV index in December
Riner, 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
Riner, WY
- Average cloud cover in December: 42
The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are August and September (Cloud cover 13).
Average visibility in December
Riner, WY
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
