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
Rolla's transition into December is marked by a clear temperature shift, receding from an icy 32.2°F (0.1°C) in November to a subzero cold 16.7°F (-8.5°C). The nighttime temperature dips to a frigid cold 5.9°F (-14.5°C) on average during December.Humidity
In December, the average relative humidity in Rolla is 91%.Rainfall
In Rolla, during December, the rain falls for 2.7 days and regularly aggregates up to 0.71" (18mm) of precipitation. In Rolla, during the entire year, the rain falls for 110.9 days and collects up to 17.95" (456mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Rolla, during December, snow falls for 15.7 days and regularly aggregates up to 3.98" (101mm) of snow. Throughout the year, in Rolla, there are 86.8 snowfall days, and 23.78" (604mm) of snow is accumulated.Daylight
December has the shortest days of the year in Rolla, with an average of 8h and 18min of daylight.On the first day of the month, sunrise is at 8:11 am and sunset at 4:44 pm. On the last day of December, in Rolla, sunrise is at 8:31 am and sunset at 4:51 pm CST.
Sunshine
In Rolla, the average sunshine in December is 3.2h.UV index
The months with the lowest UV index in Rolla are January, February and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 1 transforms into these recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold is December in Rolla?
What is the average humidity in December in Rolla?
How much does it rain in Rolla in December?
How many days does it snow in December in Rolla?
What is the month with the shortest days in Rolla?
How many hours of daylight does Rolla have in December?
When is the sunrise / sunset in December in Rolla?
How many hours of sunshine does Rolla have in December?
When is the lowest UV index in Rolla?
What is the UV index reading in December in Rolla?
Average temperature in December
Rolla, ND
- Average high temperature in December: 16.7°F
The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is January (14.2°F).
- Average low temperature in December: 5.9°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (0.5°F).
Average pressure in December
Rolla, ND
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Rolla, ND
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is October (11mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in December
Rolla, ND
- Average humidity in December: 91%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (60%).
Average rainfall in December
Rolla, ND
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is June (3.27").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in December
Rolla, ND
- Average rainfall days in December: 2.7 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (2 days).
Average snowfall in December
Rolla, ND
- Average snowfall in December: 3.98"
The month with the highest snowfall is November (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rolla, ND
- Average snowfall days in December: 15.7 days
The month with the highest number of snowfall days is December (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rolla, ND
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Rolla, ND
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in December
Rolla, ND
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Rolla, ND
- Average cloud cover in December: 67
The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Rolla, ND
- 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, February, March and December (5mi).
Rolla, North Dakota, USA
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