December weather forecastCoolin, ID
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Coolin, Idaho, with an average temperature fluctuating between 16.7°F (-8.5°C) and 27.7°F (-2.4°C).Temperature
December, with its average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 16.7°F (-8.5°C), holds the record as the coldest month.Humidity
In Coolin, the average relative humidity in December is 92%.Rainfall
December is the month with the most rainfall. Rain falls for 6.8 days and accumulates 2.83" (72mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Coolin, in December, during 17.6 snowfall days, 14.69" (373mm) of snow is typically accumulated. Throughout the year, there are 81.3 snowfall days, and 59.45" (1510mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 24min of daylight.On the first day of December, sunrise is at 7:18 am and sunset at 3:54 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:02 pm PST.
Sunshine
In December, the average sunshine is 3.3h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Coolin, ID
- Average high temperature in December: 27.7°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (27.7°F).
- Average low temperature in December: 16.7°F
The month with the highest average low temperature is August (47.1°F).
The coldest months (with the lowest average low temperature) are February and December (16.7°F).
Average pressure in December
Coolin, ID
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Coolin, ID
- Average wind speed in December: 3.4mph
The windiest months (with the highest average wind speed) are April and May (4.2mph).
The calmest month (with the lowest average wind speed) is December (3.4mph).
Average humidity in December
Coolin, ID
- Average humidity in December: 92%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (54%).
Average rainfall in December
Coolin, ID
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is December (2.83").
The driest month (with the least rainfall) is August (0.59").
Average rainfall days in December
Coolin, ID
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is April (17.7 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Coolin, ID
- Average snowfall in December: 14.69"
The month with the highest snowfall is January (14.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Coolin, ID
- Average snowfall days in December: 17.6 days
The month with the highest number of snowfall days is December (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
Coolin, ID
- Average daylight in December: 8h and 24min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 3h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Coolin, ID
- Average sunshine days in December: 11.5 days
The month with the most sunshine days is August (21 days).
The month with the least sunshine days is April (9 days).
Average UV index in December
Coolin, 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, February, November and December (UV index 1).
Average cloud cover in December
Coolin, ID
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Coolin, ID
- Average visibility in December: 3mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
