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 is the coldest month, with an average high-temperature of 23.9°F (-4.5°C) and an average low-temperature of 9.5°F (-12.5°C).Humidity
In December, the average relative humidity is 90%.Rainfall
In Tetonia, during December, the rain falls for 5.9 days and regularly aggregates up to 2.4" (61mm) of precipitation. In Tetonia, during the entire year, the rain falls for 110.1 days and collects up to 23.35" (593mm) of precipitation.Snowfall
Months with snowfall in Tetonia are January through June, September through December. In Tetonia, in December, snow falls for 21.8 days, with typically accumulated 19.41" (493mm) of snow. In Tetonia, during the entire year, snow falls for 125.3 days and aggregates up to 120.47" (3060mm) 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 December, sunrise is at 7:39 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:57 pm MST.
Sunshine
In December, the average sunshine is 4.2h.UV index
January through March and December, with an average maximum UV index of 1, are months with the lowest UV index in Tetonia. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 1 in December suggests the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of 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 December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December in Tetonia?
What is the month with the shortest days in Tetonia?
How many hours of daylight does Tetonia have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Tetonia have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Tetonia, ID
- Average high temperature in December: 23.9°F
The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is December (23.9°F).
- Average low temperature in December: 9.5°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in December
Tetonia, ID
- Average pressure in December: 30.25"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Tetonia, ID
- Average wind speed in December: 4.6mph
The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest months (with the lowest average wind speed) are January and December (4.6mph).
Average humidity in December
Tetonia, ID
- Average humidity in December: 90%
The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is August (45%).
Average rainfall in December
Tetonia, ID
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is February (2.91").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in December
Tetonia, ID
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in December
Tetonia, ID
- Average snowfall in December: 19.41"
The month with the highest snowfall is January (24.06").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Tetonia, ID
- Average snowfall days in December: 21.8 days
The month with the highest number of snowfall days is December (21.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Tetonia, 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: 4h 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 0min).
Average sunshine days in December
Tetonia, ID
- Average sunshine days in December: 9 days
The month with the most sunshine days is July (20.6 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in December
Tetonia, ID
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March and December (UV index 1).
Average cloud cover in December
Tetonia, ID
- Average cloud cover in December: 60
The month with the most cloud cover is February (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in December
Tetonia, ID
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Tetonia, Idaho, USA
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