December weather forecastMay, ID
December
Weather in December
December, the first month of the winter in May, is still a freezing cold month, with an average temperature varying between 26.1°F (-3.3°C) and 8.6°F (-13°C).Temperature
May notes the coldest temperatures in December, with a high average of 26.1°F (-3.3°C) and a low of 8.6°F (-13°C).Humidity
In May, the average relative humidity in December is 84%.Rainfall
In May, during December, the rain falls for 4.6 days and regularly aggregates up to 0.51" (13mm) of precipitation. In May, during the entire year, the rain falls for 75.7 days and collects up to 6.38" (162mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In May, during December, snow falls for 10.1 days and regularly aggregates up to 3.03" (77mm) of snow. In May, Idaho, during the entire year, snow falls for 51.7 days and aggregates up to 18.62" (473mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:53 am and sunset at 4:56 pm. On the last day of December, sunrise is at 8:12 am and sunset at 5:05 pm MST.
Sunshine
The average sunshine in December is 6h.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 2 suggests this advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Experience reduced UV exposure by about half when donning a wide-brim hat. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
May, ID
- Average high temperature in December: 26.1°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is December (26.1°F).
- Average low temperature in December: 8.6°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).
Average pressure in December
May, ID
- Average pressure in December: 30.24"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
May, ID
- Average wind speed in December: 5mph
The windiest months (with the highest average wind speed) are June and July (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in December
May, ID
- Average humidity in December: 84%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in December
May, ID
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is June (1.1").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
May, ID
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is June (10.2 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in December
May, ID
- Average snowfall in December: 3.03"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are July and August (0").
Average snowfall days in December
May, ID
- Average snowfall days in December: 10.1 days
The month with the highest number of snowfall days is December (10.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
May, ID
- Average daylight in December: 8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in December
May, ID
- Average sunshine days in December: 19.3 days
The month with the most sunshine days is July (24.1 days).
The months with the least sunshine days are March and April (17.2 days).
Average UV index in December
May, ID
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
May, ID
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in December
May, ID
- Average visibility in December: 5mi
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 and February (4mi).
