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, recording an average high temperature of 27.1°F (-2.7°C) and a low temperature of 14.9°F (-9.5°C), is Terreton's coldest month.Humidity
In Terreton, the average relative humidity in December is 87%.Rainfall
In Terreton, in December, during 9.5 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, in Terreton, there are 112.3 rainfall days, and 10.94" (278mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Terreton, during December, snow falls for 17.1 days and regularly aggregates up to 6.22" (158mm) of snow. Throughout the year, there are 79 snowfall days, and 31.54" (801mm) of snow is accumulated.Daylight
December has the shortest days of the year in Terreton, Idaho, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:44 am and sunset at 4:53 pm. On the last day of December, sunrise is at 8:03 am and sunset at 5:02 pm MST.
Sunshine
In Terreton, the average sunshine in December is 5.1h.UV index
The months with the lowest UV index in Terreton are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Terreton have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Terreton have in December?
When is the lowest UV index?
What is the UV index reading in December in Terreton?
Average temperature in December
Terreton, ID
- Average high temperature in December: 27.1°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in December: 14.9°F
The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure in December
Terreton, ID
- Average pressure in December: 30.26"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Terreton, ID
- Average wind speed in December: 5.1mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).
Average humidity in December
Terreton, ID
- Average humidity in December: 87%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (37%).
Average rainfall in December
Terreton, ID
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Terreton, ID
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is April (14.2 days).
The month with the least rainy days is July (5.8 days).
Average snowfall in December
Terreton, ID
- Average snowfall in December: 6.22"
The month with the highest snowfall is January (8.31").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Terreton, ID
- Average snowfall days in December: 17.1 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Terreton, 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: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Terreton, ID
- Average sunshine days in December: 11.8 days
The month with the most sunshine days is July (22.3 days).
The month with the least sunshine days is February (9.9 days).
Average UV index in December
Terreton, 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
Terreton, ID
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Terreton, ID
- Average visibility in December: 4mi
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, February and December (4mi).
Terreton, Idaho, USA
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