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 characterized by a noticeable reduction in the average high-temperature, falling from a wintry 37.2°F (2.9°C) in November to a subzero cold 21.7°F (-5.7°C). An average low-temperature of 9.7°F (-12.4°C) is anticipated throughout the nights during December.Humidity
The average relative humidity in December in Riverdale is 87%.Rainfall
In Riverdale, during December, the rain falls for 3.5 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 95.9 rainfall days, and 14.65" (372mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Riverdale, during December, snow falls for 13 days and regularly aggregates up to 3.19" (81mm) of snow. In Riverdale, during the entire year, snow falls for 68 days and aggregates up to 18.19" (462mm) of snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 8:13 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 8:33 am and sunset at 5:04 pm CST.
Sunshine
The months with the least sunshine are January and December, with an average of 3.7h of sunshine.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: During December, 1 as the daily maximum UV index converts into the following advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Riverdale have in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Riverdale have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Riverdale, ND
- Average high temperature in December: 21.7°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (19.6°F).
- Average low temperature in December: 9.7°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in December
Riverdale, 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 (29.84"Hg).
Average wind speed in December
Riverdale, 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 (8.6mph).
Average humidity in December
Riverdale, ND
- Average humidity in December: 87%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (54%).
Average rainfall in December
Riverdale, ND
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is June (2.64").
The driest month (with the least rainfall) is February (0.39").
Average rainfall days in December
Riverdale, ND
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in December
Riverdale, ND
- Average snowfall in December: 3.19"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Riverdale, ND
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is December (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Riverdale, ND
- Average daylight in December: 8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).
Average sunshine days in December
Riverdale, ND
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is March (13.9 days).
Average UV index in December
Riverdale, ND
- 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, February and December (UV index 1).
Average cloud cover in December
Riverdale, ND
- Average cloud cover in December: 61
The month with the most cloud cover is February (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 22).
Average visibility in December
Riverdale, 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).
Riverdale, North Dakota, USA
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