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
Shelley witnesses the coldest weather in December, with temperatures averaging a high of 27.9°F (-2.3°C) and a low of 16°F (-8.9°C).Humidity
The average relative humidity in December in Shelley is 86%.Rainfall
In Shelley, Idaho, during December, the rain falls for 8 days and regularly aggregates up to 0.91" (23mm) of precipitation. Throughout the year, there are 124.6 rainfall days, and 12.24" (311mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Shelley. In December, in Shelley, it is snowing for 16.7 days. Throughout December, 6.5" (165mm) of snow is accumulated. Throughout the year, in Shelley, there are 75.1 snowfall days, and 30.59" (777mm) of snow is accumulated.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:41 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 5:02 pm MST.
Sunshine
In Shelley, the average sunshine in December is 5.1h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Shelley. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What part of the year is the coldest in Shelley?
How cold is December in Shelley?
What is the average humidity in December in Shelley?
How much does it rain in Shelley in December?
How much does it snow in Shelley in December?
What is the month with the shortest days in Shelley?
What is the average length of the day in December in Shelley?
When is the sunrise / sunset in December in Shelley?
How long on average sun shines in December in Shelley?
When is the lowest UV index in Shelley?
What is the UV index intensity in December in Shelley?
Average temperature in December
Shelley, ID
- Average high temperature in December: 27.9°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in December: 16°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure in December
Shelley, ID
- Average pressure in December: 30.26"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Shelley, ID
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is January (6mph).
Average humidity in December
Shelley, ID
- Average humidity in December: 86%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in December
Shelley, ID
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is May (1.57").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in December
Shelley, ID
- Average rainfall days in December: 8 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in December
Shelley, ID
- Average snowfall in December: 6.5"
The month with the highest snowfall is January (7.44").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Shelley, ID
- Average snowfall days in December: 16.7 days
The month with the highest number of snowfall days is December (16.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Shelley, 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 1min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Shelley, ID
- Average sunshine days in December: 13 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is March (10 days).
Average UV index in December
Shelley, 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
Shelley, ID
- Average cloud cover in December: 49
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 11).
Average visibility in December
Shelley, 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 and February (4mi).
Shelley, Idaho, USA
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