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 comes with a decrease in the average high-temperature, falling from a chilly 45.1°F (7.3°C) in November to a cold 32.7°F (0.4°C). Thomson observes an average low-temperature of 22.5°F (-5.3°C) during December nights.Humidity
In Thomson, the average relative humidity in December is 82%.Rainfall
In December, in Thomson, the rain falls for 8 days. Throughout December, 1.54" (39mm) of precipitation is accumulated. In Thomson, during the entire year, the rain falls for 149.3 days and collects up to 29.76" (756mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Thomson, during December, snow falls for 8.7 days and regularly aggregates up to 2.56" (65mm) of snow. In Thomson, during the entire year, snow falls for 41.2 days and aggregates up to 16.73" (425mm) of snow.Daylight
The month with the shortest days in Thomson is December, with an average of 9h and 12min of daylight.On the first day of December in Thomson, sunrise is at 7:09 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:39 pm CST.
Sunshine
In December, the average sunshine is 4.1h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Thomson. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 1 during December leads to these instructions:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
How cold is it in Thomson in December?
What is the average humidity in December in Thomson?
How much does it rain in Thomson in December?
How many days does it snow in December in Thomson?
What is the month with the shortest days in Thomson?
How many hours of daylight does Thomson have in December?
When is the sunrise / sunset in December in Thomson?
How long on average sun shines in December in Thomson?
What is the month with the lowest UV index in Thomson?
How high is the UV index in December in Thomson?
Average temperature in December
Thomson, IL
- Average high temperature in December: 32.7°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in December: 22.5°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
Thomson, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Thomson, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Thomson, IL
- Average humidity in December: 82%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Thomson, IL
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in December
Thomson, IL
- Average rainfall days in December: 8 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in December
Thomson, IL
- Average snowfall in December: 2.56"
The month with the highest snowfall is January (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Thomson, IL
- Average snowfall days in December: 8.7 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Thomson, IL
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Thomson, IL
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in December
Thomson, IL
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Thomson, IL
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in December
Thomson, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Thomson, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
