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, with an average high of 35.8°F (2.1°C) and a low of 24.4°F (-4.2°C), signifies the coldest month of the year.Humidity
In December, the average relative humidity is 76%.Rainfall
December is the month with the most rainfall. Rain falls for 10.6 days and accumulates 1.38" (35mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. The month with the most snowfall is December, when snow falls for 7.5 days and typically aggregates up to 3.39" (86mm) 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 8:01 am and sunset at 5:11 pm. On the last day of December, sunrise is at 8:20 am and sunset at 5:20 pm MST.
Sunshine
With an average of 5.5h of sunshine, December has the least sunshine of the year.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 estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the UV index of 2 transforms into the following advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is it in December?
What is the average humidity in December?
What is the wettest month?
How much does it rain in December?
When does it snow the most?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine in Greenleaf?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Greenleaf, ID
- Average high temperature in December: 35.8°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is December (35.8°F).
- Average low temperature in December: 24.4°F
The months with the highest average low temperature are July and August (62.8°F).
The coldest month (with the lowest average low temperature) is December (24.4°F).
Average pressure in December
Greenleaf, ID
- Average pressure in December: 30.21"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in December
Greenleaf, ID
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).
Average humidity in December
Greenleaf, ID
- Average humidity in December: 76%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (29%).
Average rainfall in December
Greenleaf, ID
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is December (1.38").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Greenleaf, ID
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is July (3.3 days).
Average snowfall in December
Greenleaf, ID
- Average snowfall in December: 3.39"
The month with the highest snowfall is December (3.39").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Greenleaf, ID
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is December (7.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Greenleaf, 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
Greenleaf, ID
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is July (25.1 days).
The month with the least sunshine days is March (13.6 days).
Average UV index in December
Greenleaf, 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
Greenleaf, ID
- Average cloud cover in December: 41
The month with the most cloud cover is December (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in December
Greenleaf, ID
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Greenleaf, Idaho, USA
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