December weather forecastPreston, ID
December
Weather in December
Finally, December ushers in a full swing of winter in Preston, Idaho. Despite the cold, crisp weather and shorter daylight hours, a unique beauty resides in the town during this time. Snowfall becomes a regular feature alongside falling temperatures, layering the city in a blanket of white. The yearly cycle concludes with this month being one of the coldest and snowiest. With its serene snowscape and winter chill, December indeed brings a cozy conclusion to the year in Preston.Temperature
The coldest period tends to be December, when average temperatures fluctuate between a high of 28.8°F (-1.8°C) and a low of 14.9°F (-9.5°C).Humidity
In Preston, the average relative humidity in December is 86%.Rainfall
In Preston, in December, during 9.6 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. In Preston, during the entire year, the rain falls for 127.4 days and collects up to 18.27" (464mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Preston, during December, snow falls for 17.3 days and regularly aggregates up to 12.4" (315mm) of snow. Throughout the year, in Preston, Idaho, there are 83.8 snowfall days, and 60.12" (1527mm) 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 December, sunrise is at 7:36 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 5:06 pm MST.
Sunshine
The average sunshine in December is 5.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Preston. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 1 in December translates into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Preston, ID
- Average high temperature in December: 28.8°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in December: 14.9°F
The month with the highest average low temperature is July (53.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
Preston, ID
- Average pressure in December: 30.25"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Preston, ID
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in December
Preston, ID
- Average humidity in December: 86%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall in December
Preston, ID
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is February (2.24").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Preston, ID
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is April (16.6 days).
The month with the least rainy days is July (5.5 days).
Average snowfall in December
Preston, ID
- Average snowfall in December: 12.4"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Preston, ID
- Average snowfall days in December: 17.3 days
The months with the highest number of snowfall days are January and February (17.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Preston, ID
- 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 18min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Preston, ID
- Average sunshine days in December: 11.2 days
The month with the most sunshine days is July (21.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
Preston, ID
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Preston, ID
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in December
Preston, ID
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
