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 weather is marked by a drop in the average high-temperature, falling from a frosty 48.9°F (9.4°C) in November to a cold 37.6°F (3.1°C). In Fairmount, an average low-temperature of 27.5°F (-2.5°C) is recorded during December nights.Humidity
The average relative humidity in December is 81%.Rainfall
In December, in Fairmount, the rain falls for 8.8 days. Throughout December, 1.46" (37mm) of precipitation is accumulated. In Fairmount, Illinois, during the entire year, the rain falls for 151.8 days and collects up to 25.63" (651mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Fairmount. In December, it is snowing for 7.9 days. Throughout December, 2.09" (53mm) of snow is accumulated. In Fairmount, during the entire year, snow falls for 35.2 days and aggregates up to 8.82" (224mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:54 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:36 pm CST.
Sunshine
The average sunshine in December is 4.5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
Is it cold in Fairmount during December?
What is the average humidity in December in Fairmount?
How much does it rain in Fairmount in December?
How much does it snow in Fairmount in December?
What is the month with the shortest days in Fairmount?
How many hours of daylight does Fairmount have in December?
When is the sunrise / sunset in December in Fairmount?
How long on average sun shines in December in Fairmount?
When is the lowest UV index in Fairmount?
What is the UV index reading in December in Fairmount?
Average temperature in December
Fairmount, IL
- Average high temperature in December: 37.6°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.6°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 (20.5°F).
Average pressure in December
Fairmount, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Fairmount, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Fairmount, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Fairmount, IL
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is April (3.23").
The driest months (with the least rainfall) are February and September (1.38").
Average rainfall days in December
Fairmount, IL
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (6.6 days).
Average snowfall in December
Fairmount, IL
- Average snowfall in December: 2.09"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Fairmount, IL
- Average snowfall days in December: 7.9 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fairmount, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Fairmount, IL
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in December
Fairmount, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Fairmount, IL
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility in December
Fairmount, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Fairmount, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
