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's arrival corresponds with a decrease in average high-temperatures, from November's frosty 46.9°F (8.3°C) to a wintry 35.6°F (2°C). Glenwood, in the month of December, anticipates a consistent average low-temperature of 25.9°F (-3.4°C).Humidity
In December, the average relative humidity in Glenwood is 81%.Rainfall
December is the month with the least rainfall in Glenwood. Rain falls for 7.9 days and accumulates 1.54" (39mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Glenwood, in December, snow falls for 9.1 days, with typically accumulated 2.76" (70mm) of snow. In Glenwood, during the entire year, snow falls for 44.6 days and aggregates up to 16.46" (418mm) of snow.Daylight
December has the shortest days of the year in Glenwood, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:58 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:30 pm CST.
Sunshine
In December, the average sunshine is 4h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Glenwood, Illinois. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 1 during December translates into the following guidance:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Glenwood in December?
What is the average humidity in December in Glenwood?
What is the driest month in Glenwood?
How much does it rain in Glenwood in December?
How much does it snow in Glenwood in December?
What is the month with the shortest days in Glenwood?
How many hours of daylight does Glenwood have in December?
When is the sunrise / sunset in December in Glenwood?
How many hours of sunshine does Glenwood have in December?
When is the lowest UV index in Glenwood?
How high is the UV index in December in Glenwood?
Average temperature in December
Glenwood, IL
- Average high temperature in December: 35.6°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 (29.7°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
Glenwood, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Glenwood, IL
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Glenwood, IL
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Glenwood, IL
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days in December
Glenwood, IL
- Average rainfall days in December: 7.9 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in December
Glenwood, IL
- Average snowfall in December: 2.76"
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Glenwood, IL
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Glenwood, IL
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Glenwood, IL
- Average sunshine days in December: 15 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.2 days).
Average UV index in December
Glenwood, IL
- 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
Glenwood, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Glenwood, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Glenwood, Illinois, USA
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