December weather forecastOkawville, IL
December
Weather in December
The first month of the winter, December, is also a frosty month in Okawville, Illinois, with an average temperature ranging between min 30.7°F (-0.7°C) and max 42.8°F (6°C).Temperature
The onset of December entails a temperature shift, as the average high-temperature decreases from a fresh 53.1°F (11.7°C) in November to a frosty 42.8°F (6°C). Okawville's average low-temperature during December nights is observed to be a freezing cold 30.7°F (-0.7°C).Humidity
The average relative humidity in December is 78%.Rainfall
In Okawville, in December, during 9.2 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Okawville, Illinois, during the entire year, the rain falls for 166.8 days and collects up to 37.83" (961mm) of precipitation.Snowfall
January through April, September, November and December are months with snowfall. In Okawville, in December, snow falls for 4.5 days, with typically accumulated 1.3" (33mm) of snow. In Okawville, during the entire year, snow falls for 23.2 days and aggregates up to 7.87" (200mm) 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 December, sunrise is at 6:57 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:47 pm CST.
Sunshine
In December, the average sunshine is 4.8h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Okawville, IL
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in December
Okawville, IL
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Okawville, IL
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in December
Okawville, IL
- Average humidity in December: 78%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Okawville, IL
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is April (4.45").
The driest month (with the least rainfall) is February (2.01").
Average rainfall days in December
Okawville, IL
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is December (9.2 days).
Average snowfall in December
Okawville, IL
- Average snowfall in December: 1.3"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in December
Okawville, IL
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Okawville, IL
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Okawville, IL
- Average sunshine days in December: 17 days
The months with the most sunshine days are October and November (17.5 days).
The month with the least sunshine days is May (9.3 days).
Average UV index in December
Okawville, IL
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Okawville, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Okawville, 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).
