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
In Gillespie, the average high-temperature in December drops from a cool 51.6°F (10.9°C) in November to an icy 40.3°F (4.6°C). Throughout December, the average low-temperature dips to a subzero cold 29.1°F (-1.6°C).Humidity
In Gillespie, the average relative humidity in December is 78%.Rainfall
In Gillespie, in December, during 6.7 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In Gillespie, during the entire year, the rain falls for 121.4 days and collects up to 14.72" (374mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. December is the month with the most snowfall in Gillespie, Illinois. Snow falls for 3.8 days and accumulates 0.98" (25mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:37 pm. On the last day of December, in Gillespie, Illinois, sunrise is at 7:18 am and sunset at 4:46 pm CST.
Sunshine
The average sunshine in December is 4.8h.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 value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Boost your sun resistance with garments that are densely woven yet spacious. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
How cold is it in Gillespie in December?
What is the average humidity in December in Gillespie?
How many days does it rain in December in Gillespie?
What is the snowiest month in Gillespie?
How much does it snow in Gillespie in December?
What is the month with the shortest days in Gillespie?
How many hours of daylight does Gillespie have in December?
When is the sunrise / sunset in December in Gillespie?
How long on average sun shines in December in Gillespie?
When is the lowest UV index in Gillespie?
How high is the UV index in December in Gillespie?
Average temperature in December
Gillespie, IL
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in December
Gillespie, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Gillespie, IL
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in December
Gillespie, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Gillespie, IL
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
Gillespie, IL
- Average rainfall days in December: 6.7 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Gillespie, IL
- Average snowfall in December: 0.98"
The month with the highest snowfall is December (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Gillespie, IL
- Average snowfall days in December: 3.8 days
The month with the highest number of snowfall days is January (6.3 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
Gillespie, IL
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Gillespie, IL
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in December
Gillespie, 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
Gillespie, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility in December
Gillespie, IL
- 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).
Gillespie, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
