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 correlates with a reduction in the average high-temperature, down from a frosty 44.6°F (7°C) in November to a wintry 33.3°F (0.7°C). Rockford, during the nights of December, averages a temperature close to its daytime high, at a subzero cold 25.2°F (-3.8°C).Humidity
In Rockford, the average relative humidity in December is 85%.Rainfall
In Rockford, during December, the rain falls for 7.6 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, there are 135.2 rainfall days, and 18.19" (462mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Rockford, in December, during 16 snowfall days, 4.33" (110mm) of snow is typically accumulated. Throughout the year, in Rockford, there are 71.5 snowfall days, and 17.52" (445mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:54 am and sunset at 5:08 pm. On the last day of December, in Rockford, sunrise is at 8:13 am and sunset at 5:17 pm EST.
Sunshine
The average sunshine in December in Rockford is 2.8h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily maximum UV index of 1 in December interprets into the following advice:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
How cold is it in Rockford in December?
What is the average humidity in December in Rockford?
How many days does it rain in December in Rockford?
How much does it snow in Rockford in December?
What is the month with the shortest days in Rockford?
How many hours of daylight does Rockford have in December?
When are sunrise and sunset in December in Rockford?
How long on average sun shines in December in Rockford?
When is the lowest UV index in Rockford?
How high is the UV index in December in Rockford?
Average temperature in December
Rockford, MI
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in December: 25.2°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Rockford, MI
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Rockford, MI
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in December
Rockford, MI
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
Rockford, MI
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is October (2.24").
The driest months (with the least rainfall) are February and September (1.1").
Average rainfall days in December
Rockford, MI
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is October (15.9 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in December
Rockford, MI
- Average snowfall in December: 4.33"
The month with the highest snowfall is January (4.69").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Rockford, MI
- Average snowfall days in December: 16 days
The month with the highest number of snowfall days is January (19.5 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, MI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Rockford, MI
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in December
Rockford, MI
- Average UV index in December: 1
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Rockford, MI
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Rockford, MI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Rockford, Michigan, USA
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