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 start of December involves a temperature drop, moving from a chilly 46.9°F (8.3°C) in November to a cold 37°F (2.8°C). The month of December shows a minor drop from daytime temperatures, generally recording a low average of 28.8°F (-1.8°C).Humidity
In December, the average relative humidity is 82%.Rainfall
In Flat Rock, in December, it is raining for 12.3 days, with typically 1.93" (49mm) of accumulated precipitation. In Flat Rock, during the entire year, the rain falls for 176.1 days and collects up to 31.46" (799mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Flat Rock, during December, snow falls for 10.5 days and regularly aggregates up to 3.03" (77mm) of snow. Throughout the year, there are 54.2 snowfall days, and 15.67" (398mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Flat Rock.On the first day of December, sunrise is at 7:38 am and sunset at 5:03 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:12 pm EST.
Sunshine
The average sunshine in December is 3.7h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The UV index of 1 during December translates into the following guidance:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Around midday, solar radiation is most harmful; hence, exposure should be limited. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December in Flat Rock?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Flat Rock, OH
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 28.8°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 (20.5°F).
Average pressure in December
Flat Rock, OH
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Flat Rock, OH
- Average wind speed in December: 10.8mph
The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
Flat Rock, OH
- 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, OH
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is February (1.73").
Average rainfall days in December
Flat Rock, OH
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in December
Flat Rock, OH
- Average snowfall in December: 3.03"
The month with the highest snowfall is February (4.25").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Flat Rock, OH
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Flat Rock, OH
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 3h and 4min
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 12min).
Average sunshine days in December
Flat Rock, OH
- Average sunshine days in December: 11 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in December
Flat Rock, OH
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Flat Rock, OH
- Average cloud cover in December: 62
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 28).
Average visibility in December
Flat Rock, OH
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Flat Rock, Ohio, USA
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