December weather forecastFlat Rock, MI
December
Weather in December
December, the first month of the winter in Flat Rock, is also an icy month, with an average temperature fluctuating between 27.5°F (-2.5°C) and 35.4°F (1.9°C).Temperature
December weather is marked by a drop in the average high-temperature, falling from a chilly 45.7°F (7.6°C) in November to a wintry 35.4°F (1.9°C). Flat Rock experiences a subtle drop in temperature during the December nights, recording an average of 27.5°F (-2.5°C).Humidity
In December, the average relative humidity is 82%.Rainfall
The month with the least rainfall in Flat Rock is December, when the rain falls for 8.3 days and typically collects 1.26" (32mm) of precipitation.Snowfall
Months with snowfall in Flat Rock, Michigan, are January through May, November and December. In Flat Rock, during December, snow falls for 7.4 days and regularly aggregates up to 1.54" (39mm) of snow. Throughout the year, in Flat Rock, there are 37.7 snowfall days, and 12.87" (327mm) of snow is accumulated.Daylight
December has the shortest days of the year in Flat Rock, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:42 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 5:11 pm EST.
Sunshine
The average sunshine in December in Flat Rock is 3.6h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Flat Rock. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Avoiding the Sun during its peak radiation time around midday is a healthy practice. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Flat Rock, MI
- Average high temperature in December: 35.4°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in December
Flat Rock, MI
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Flat Rock, MI
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in December
Flat Rock, MI
- Average humidity in December: 82%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Flat Rock, MI
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is December (1.26").
Average rainfall days in December
Flat Rock, MI
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in December
Flat Rock, MI
- Average snowfall in December: 1.54"
The month with the highest snowfall is February (4.25").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Flat Rock, MI
- Average snowfall days in December: 7.4 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Flat Rock, MI
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Flat Rock, MI
- Average sunshine days in December: 16.2 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in December
Flat Rock, MI
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Flat Rock, MI
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Flat Rock, MI
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
