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
The shift into December is characterized by a noticeable reduction in the average high-temperature, decreasing from November's icy 39.9°F (4.4°C) to a subzero cold 24.4°F (-4.2°C). Throughout December, an average low-temperature of 14.9°F (-9.5°C) is expected.Humidity
The average relative humidity in December is 87%.Rainfall
In Rockford, in December, during 3.7 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Rockford, during the entire year, the rain falls for 118.6 days and collects up to 21.14" (537mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. December is the month with the most snowfall. Snow falls for 12.1 days and accumulates 4.65" (118mm) of snow.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:33 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:53 am and sunset at 4:43 pm CST.
Sunshine
In Rockford, the average sunshine in December is 3.5h.UV index
January, February, November 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 unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 1 in December translates into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
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 much does it rain in Rockford in December?
When does it snow the most?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Rockford have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Rockford, MN
- Average high temperature in December: 24.4°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in December: 14.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7.2°F).
Average pressure in December
Rockford, MN
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Rockford, MN
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity in December
Rockford, MN
- Average humidity in December: 87%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (71%).
Average rainfall in December
Rockford, MN
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Rockford, MN
- Average rainfall days in December: 3.7 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is January (2.5 days).
Average snowfall in December
Rockford, MN
- Average snowfall in December: 4.65"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rockford, MN
- Average snowfall days in December: 12.1 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rockford, MN
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 3h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in December
Rockford, MN
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is December (17.8 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Rockford, MN
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Rockford, MN
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in December
Rockford, MN
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Rockford, Minnesota, USA
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