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's arrival sees a clear drop in the average high-temperature, decreasing from November's wintry 37.2°F (2.9°C) to a freezing cold 21.7°F (-5.7°C). The temperature in Riverdale Junction, North Dakota, lowers to an average of 9.7°F (-12.4°C) during December nights.Humidity
In Riverdale Junction, North Dakota, the average relative humidity in December is 87%.Rainfall
In Riverdale Junction, in December, during 3.5 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Riverdale Junction, during the entire year, the rain falls for 95.9 days and collects up to 14.65" (372mm) of precipitation.Snowfall
Months with snowfall in Riverdale Junction are January through May, October through December. In Riverdale Junction, in December, snow falls for 13 days, with typically accumulated 3.19" (81mm) of snow. Throughout the year, there are 68 snowfall days, and 18.19" (462mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 8:12 am and sunset at 4:55 pm. On the last day of December, in Riverdale Junction, sunrise is at 8:32 am and sunset at 5:03 pm CST.
Sunshine
January and December, with an average of 3.7h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 1 in December translates into these instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. To protect against the Sun's most potent rays, avoid direct exposure around midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
How cold is it in Riverdale Junction in December?
What is the average humidity in December in Riverdale Junction?
How many days does it rain in December in Riverdale Junction?
How much does it snow in Riverdale Junction in December?
What is the month with the shortest days in Riverdale Junction?
How many hours of daylight does Riverdale Junction have in December?
What time are sunrise and sunset in December in Riverdale Junction?
What are the months with the least sunshine in Riverdale Junction?
How long on average sun shines in December in Riverdale Junction?
When is the lowest UV index in Riverdale Junction?
What is the UV index intensity in December in Riverdale Junction?
Average temperature in December
Riverdale Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, 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 Junction, North Dakota, USA
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