December weather forecastIdaho City, ID
December
Weather in December
December brings into full swing the winter season in Idaho City, taking on the mantle of the coldest month. With temperature figures straddling 19.4°F (-7°C) and 31.3°F (-0.4°C), hard freezes become the norm. An abundance of snowfall returns, setting the stage for winter sports and holiday celebrations. Despite shorter daylight periods, the Christmas lights brighten up the city, ushering in a festive mood. As the year winds down, December's chilly winds and snowy landscape embody the quintessential Idaho City winter experience.Temperature
In Idaho City, the lowest temperatures are generally noted in December, averaging a high of 31.3°F (-0.4°C) and a low of 19.4°F (-7°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Idaho City, in December, during 5.9 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Throughout the year, there are 103.4 rainfall days, and 19.84" (504mm) of precipitation is accumulated.Snowfall
January through June, October through December are months with snowfall. In Idaho City, during December, snow falls for 14.4 days and regularly aggregates up to 17.32" (440mm) of snow. In Idaho City, during the entire year, snow falls for 79.1 days and aggregates up to 88.94" (2259mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:58 am and sunset at 5:07 pm. On the last day of December, sunrise is at 8:17 am and sunset at 5:16 pm MST.
Sunshine
With an average of 5.2h of sunshine, December has the least sunshine of the year.UV index
The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 2 in December translates into these instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be watchful! The reflection of snow can enhance the intensity of 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
Idaho City, ID
- Average high temperature in December: 31.3°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (31.3°F).
- Average low temperature in December: 19.4°F
The month with the highest average low temperature is August (56.8°F).
The coldest month (with the lowest average low temperature) is December (19.4°F).
Average pressure in December
Idaho City, ID
- Average pressure in December: 30.22"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in December
Idaho City, ID
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).
Average humidity in December
Idaho City, ID
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in December
Idaho City, ID
- Average rainfall in December: 2.44"
The wettest month (with the highest rainfall) is March (2.83").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Idaho City, ID
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in December
Idaho City, ID
- Average snowfall in December: 17.32"
The month with the highest snowfall is January (20.59").
The months with the least snowfall are July, August and September (0").
Average snowfall days in December
Idaho City, ID
- Average snowfall days in December: 14.4 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Idaho City, ID
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 5h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in December
Idaho City, ID
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is July (22.3 days).
The month with the least sunshine days is March (11.2 days).
Average UV index in December
Idaho City, ID
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Idaho City, ID
- Average cloud cover in December: 45
The month with the most cloud cover is December (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in December
Idaho City, ID
- 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).
