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
December, having an average high-temperature of 34.7°F (1.5°C) and an average low-temperature of 23.2°F (-4.9°C), is the coldest month.Humidity
The average relative humidity in December in Boise is 78%.Rainfall
In Boise, Idaho, in December, during 10.4 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. Throughout the year, there are 116.8 rainfall days, and 15.08" (383mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. December is the month with the most snowfall. Snow falls for 9.2 days and accumulates 6.65" (169mm) of snow.Daylight
The month with the shortest days in Boise is December, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:59 am and sunset at 5:09 pm. On the last day of December, in Boise, sunrise is at 8:18 am and sunset at 5:18 pm MST.
Sunshine
December has the least sunshine of the year, with an average of 5.5h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 2 during December translates into the following directions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What is the coldest month in Boise?
How cold is it in Boise in December?
What is the average humidity in December in Boise?
How many days does it rain in December in Boise?
What is the snowiest month in Boise?
How much does it snow in Boise in December?
What is the month with the shortest days in Boise?
What is the average length of the day in December in Boise?
What time are sunrise and sunset in December in Boise?
What is the month with the least sunshine in Boise?
How long on average sun shines in December in Boise?
When is the lowest UV index in Boise?
What is the UV index intensity in December in Boise?
Average temperature in December
Boise, ID
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is December (34.7°F).
- Average low temperature in December: 23.2°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.2°F).
Average pressure in December
Boise, ID
- Average pressure in December: 30.22"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Boise, ID
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).
Average humidity in December
Boise, ID
- Average humidity in December: 78%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (30%).
Average rainfall in December
Boise, ID
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in December
Boise, ID
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is July (4.5 days).
Average snowfall in December
Boise, ID
- Average snowfall in December: 6.65"
The month with the highest snowfall is December (6.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Boise, ID
- Average snowfall days in December: 9.2 days
The month with the highest number of snowfall days is December (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Boise, 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 3min
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 30min).
Average sunshine days in December
Boise, ID
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is July (23.6 days).
The month with the least sunshine days is March (12.1 days).
Average UV index in December
Boise, ID
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Boise, ID
- Average cloud cover in December: 42
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in December
Boise, ID
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Boise, Idaho, USA
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