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 month that records the lowest temperatures, with averages ranging from a high of 28.8°F (-1.8°C) to a low of 14.9°F (-9.5°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In Swanlake, Idaho, in December, during 9.6 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. In Swanlake, during the entire year, the rain falls for 127.4 days and collects up to 18.27" (464mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Swanlake, in December, during 17.3 snowfall days, 12.4" (315mm) of snow is typically accumulated. Throughout the year, there are 83.8 snowfall days, and 60.12" (1527mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December in Swanlake, sunrise is at 7:38 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:05 pm MST.
Sunshine
The average sunshine in December is 5.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in Swanlake in December?
What is the month with the shortest days?
How many hours of daylight does Swanlake have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Swanlake, ID
- Average high temperature in December: 28.8°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in December: 14.9°F
The month with the highest average low temperature is July (53.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
Swanlake, ID
- Average pressure in December: 30.25"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Swanlake, ID
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in December
Swanlake, ID
- Average humidity in December: 86%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall in December
Swanlake, ID
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is February (2.24").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Swanlake, ID
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is April (16.6 days).
The month with the least rainy days is July (5.5 days).
Average snowfall in December
Swanlake, ID
- Average snowfall in December: 12.4"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Swanlake, ID
- Average snowfall days in December: 17.3 days
The months with the highest number of snowfall days are January and February (17.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Swanlake, ID
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 5h and 2min
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 48min).
Average sunshine days in December
Swanlake, ID
- Average sunshine days in December: 11.2 days
The month with the most sunshine days is July (21.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
Swanlake, 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
Swanlake, ID
- Average cloud cover in December: 46
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 10).
Average visibility in December
Swanlake, 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).
Swanlake, Idaho, USA
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