December weather forecastTwin Falls, ID
December
Weather in December
December marks the peak of winter in Twin Falls, with severe cold and the heaviest snowfall of 4.53" (115mm). The city becomes a quiet, snow-dusted landscape as people retreat indoors to celebrate the holiday season. Compared to November, the chilly conditions intensify making way for the coldest month of the year. Amid the biting cold, the city meticulously decorates itself for the festive season, making for a stunning winter wonderland. Despite the harsh weather, the spirit of the season and the imminent New Year instill a sense of joy and warmth in Twin Falls.Temperature
December is the coldest month of the year, registering average temperatures as high as 34°F (1.1°C) and as low as 23°F (-5°C).Humidity
The average relative humidity in December is 77%.Rainfall
December is the month with the most rainfall. Rain falls for 7.5 days and accumulates 1.3" (33mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Twin Falls, during December, snow falls for 9.4 days and regularly aggregates up to 4.53" (115mm) of snow. Throughout the year, there are 35.5 snowfall days, and 17.32" (440mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:48 am and sunset at 5:05 pm. On the last day of December, sunrise is at 8:07 am and sunset at 5:14 pm MST.
Sunshine
December has the least sunshine of the year, with an average of 5.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: During December, 2 as the daily maximum UV index converts into the following advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. To protect against the Sun's most potent rays, avoid direct exposure around midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. 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
Twin Falls, ID
- Average high temperature in December: 34°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (34°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (23°F).
Average pressure in December
Twin Falls, ID
- Average pressure in December: 30.23"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Twin Falls, ID
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity in December
Twin Falls, ID
- Average humidity in December: 77%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is July (28%).
Average rainfall in December
Twin Falls, ID
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is December (1.3").
The driest months (with the least rainfall) are July and August (0.24").
Average rainfall days in December
Twin Falls, ID
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in December
Twin Falls, ID
- Average snowfall in December: 4.53"
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Twin Falls, ID
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is December (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Twin Falls, ID
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 5h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Twin Falls, ID
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is August (23.3 days).
The month with the least sunshine days is March (14.7 days).
Average UV index in December
Twin Falls, ID
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Twin Falls, ID
- Average cloud cover in December: 40
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in December
Twin Falls, ID
- 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).
