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
As December commences, the average high-temperature shows a reduction, transitioning from a cool 50°F (10°C) in November to a cold 38.5°F (3.6°C). Chambersburg records a steady low-temperature average of 26.8°F (-2.9°C) during December.Humidity
In Chambersburg, the average relative humidity in December is 78%.Rainfall
In December, in Chambersburg, the rain falls for 6.4 days. Throughout December, 1.06" (27mm) of precipitation is accumulated. In Chambersburg, Illinois, during the entire year, the rain falls for 132 days and collects up to 22.17" (563mm) of precipitation.Snowfall
Months with snowfall in Chambersburg are January through April, November and December. In Chambersburg, in December, snow falls for 4.7 days, with typically accumulated 1.18" (30mm) of snow. In Chambersburg, during the entire year, snow falls for 23.8 days and aggregates up to 8.5" (216mm) of snow.Daylight
December has the shortest days of the year in Chambersburg, Illinois, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:05 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:48 pm CST.
Sunshine
In Chambersburg, the average sunshine in December is 4.6h.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 minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Chambersburg in December?
What is the average humidity in December in Chambersburg?
How much does it rain in Chambersburg in December?
How much does it snow in Chambersburg in December?
What is the month with the shortest days in Chambersburg?
What is the average length of the day in December in Chambersburg?
When is the sunrise / sunset in December in Chambersburg?
How long on average sun shines in December in Chambersburg?
What is the month with the lowest UV index in Chambersburg?
What is the UV index reading in December in Chambersburg?
Average temperature in December
Chambersburg, IL
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Chambersburg, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Chambersburg, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in December
Chambersburg, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Chambersburg, IL
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in December
Chambersburg, IL
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is May (16.9 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in December
Chambersburg, IL
- Average snowfall in December: 1.18"
The month with the highest snowfall is January (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Chambersburg, IL
- Average snowfall days in December: 4.7 days
The month with the highest number of snowfall days is January (7.8 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
Chambersburg, IL
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 4h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Chambersburg, IL
- Average sunshine days in December: 19.4 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in December
Chambersburg, 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
Chambersburg, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July, August and September (Cloud cover 30).
Average visibility in December
Chambersburg, 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).
Chambersburg, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location