Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The coldest month is December, with an average high-temperature of 26.1°F (-3.3°C) and an average low-temperature of 8.6°F (-13°C).Humidity
In December, the average relative humidity is 84%.Rainfall
In Challis, in December, it is raining for 4.6 days, with typically 0.51" (13mm) of accumulated precipitation. In Challis, during the entire year, the rain falls for 75.7 days and collects up to 6.38" (162mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. In Challis, during December, snow falls for 10.1 days and regularly aggregates up to 3.03" (77mm) of snow. Throughout the year, in Challis, there are 51.7 snowfall days, and 18.62" (473mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 7:54 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 8:13 am and sunset at 5:07 pm MST.
Sunshine
In Challis, Idaho, the average sunshine in December is 6h.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Challis. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the coldest months in Challis?
How cold is it in Challis in December?
What is the average humidity in December in Challis?
How much does it rain in Challis in December?
How many days does it snow in December in Challis?
What is the month with the shortest days in Challis?
How many hours of daylight does Challis have in December?
What time are sunrise and sunset in December in Challis?
How long on average sun shines in December in Challis?
What are the months with the lowest UV index in Challis?
What is the UV index reading in December in Challis?
Average temperature in December
Challis, ID
- Average high temperature in December: 26.1°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is December (26.1°F).
- Average low temperature in December: 8.6°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).
Average pressure in December
Challis, ID
- Average pressure in December: 30.24"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Challis, ID
- Average wind speed in December: 5mph
The windiest months (with the highest average wind speed) are June and July (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in December
Challis, ID
- Average humidity in December: 84%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in December
Challis, ID
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is June (1.1").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
Challis, ID
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is June (10.2 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in December
Challis, ID
- Average snowfall in December: 3.03"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Challis, ID
- Average snowfall days in December: 10.1 days
The month with the highest number of snowfall days is December (10.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Challis, ID
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in December
Challis, ID
- Average sunshine days in December: 19.3 days
The month with the most sunshine days is July (24.1 days).
The months with the least sunshine days are March and April (17.2 days).
Average UV index in December
Challis, ID
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
Challis, ID
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in December
Challis, ID
- Average visibility in December: 5mi
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 and February (4mi).
Challis, Idaho, USA
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