December weather forecastRoberts, ID
December
Weather in December
December, the first month of the winter in Roberts, is still a freezing cold month, with an average temperature fluctuating between 27.1°F (-2.7°C) and 14.9°F (-9.5°C).Temperature
With average high temperatures of 27.1°F (-2.7°C) and lows of 14.9°F (-9.5°C), December is the coldest month.Humidity
The average relative humidity in December is 87%.Rainfall
In Roberts, in December, during 9.5 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, there are 112.3 rainfall days, and 10.94" (278mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. In December, in Roberts, it is snowing for 17.1 days. Throughout December, 6.22" (158mm) of snow is accumulated. Throughout the year, there are 79 snowfall days, and 31.54" (801mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:43 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:01 pm MST.
Sunshine
In December, the average sunshine is 5.1h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Roberts, 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
Roberts, 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
Roberts, 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
Roberts, 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
Roberts, 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
Roberts, 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
Roberts, 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
Roberts, 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
Roberts, 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 6min
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
Roberts, 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
Roberts, 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
Roberts, 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
Roberts, 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).
