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 clear drop in the average high-temperature, falling from November's cold 38.5°F (3.6°C) to a freezing cold 23°F (-5°C). Rock Haven's nighttime temperature in December drops to an average of 11.3°F (-11.5°C).Humidity
In December, the average relative humidity is 87%.Rainfall
In December, in Rock Haven, the rain falls for 2.9 days. Throughout December, 0.63" (16mm) of precipitation is accumulated. In Rock Haven, during the entire year, the rain falls for 94.3 days and collects up to 14.29" (363mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Rock Haven. The month with the most snowfall is December, when snow falls for 12.8 days and typically aggregates up to 3.31" (84mm) of snow.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year in Rock Haven.On the first day of the month, sunrise is at 8:08 am and sunset at 4:56 pm. On the last day of December, sunrise is at 8:28 am and sunset at 5:05 pm CST.
Sunshine
In December, the average sunshine in Rock Haven is 4.1h.UV index
November and December, with an average maximum UV index of 1, are months with the lowest UV index in Rock Haven. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, a daily UV index of 1 turns into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Rock Haven in December?
What is the average humidity in December in Rock Haven?
How many days does it rain in December in Rock Haven?
When does it snow the most in Rock Haven?
How many days does it snow in December in Rock Haven?
What is the month with the shortest days in Rock Haven?
What is the average length of the day in December in Rock Haven?
What time are sunrise and sunset in December in Rock Haven?
How long on average sun shines in December in Rock Haven?
What are the months with the lowest UV index in Rock Haven?
How high is the UV index in December in Rock Haven?
Average temperature in December
Rock Haven, ND
- Average high temperature in December: 23°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in December: 11.3°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in December
Rock Haven, ND
- Average pressure in December: 30.14"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
Rock Haven, ND
- Average wind speed in December: 9.8mph
The windiest months (with the highest average wind speed) are April and October (10.8mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in December
Rock Haven, ND
- Average humidity in December: 87%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (55%).
Average rainfall in December
Rock Haven, ND
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Rock Haven, ND
- Average rainfall days in December: 2.9 days
The month with the highest number of rainy days is June (13.1 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in December
Rock Haven, ND
- Average snowfall in December: 3.31"
The month with the highest snowfall is December (3.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rock Haven, ND
- Average snowfall days in December: 12.8 days
The month with the highest number of snowfall days is December (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rock Haven, ND
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Rock Haven, ND
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is June (14.6 days).
Average UV index in December
Rock Haven, 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 November and December (UV index 1).
Average cloud cover in December
Rock Haven, ND
- Average cloud cover in December: 58
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in December
Rock Haven, 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).
Rock Haven, North Dakota, USA
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