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Weather in Sangamon County, Illinois for December 2025

Your guide to Sangamon County weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 2 snowy days, Sangamon County usually enjoys a light touch of snow in December.
    According to Sangamon County snow forecast for December 2025, 2 snowy days are expected until the end of the month. The closest date with snow is Saturday, December 27.

    • Temperatures

  • Until now, December 2025 in Sangamon County is slightly cooler than the historical average by -1.2 °F.

  • The forecast for the upcoming days in Sangamon County predicts a temperature of 3.6 °F, which is slightly above the historical average.

  • In general, the average temperature in Sangamon County at the beginning of December is 0.4 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 2.9 °F by the end of December.

    • Rain 🌧️

  • With an average of 5 rainy days, Sangamon County experiences minimal rainfall in December.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
24
Dry days
Average rainy days
5
Rainy days
Average snowy days
2
Snow days
Average temperatures
4°/-1°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Sangamon County Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
-0°
2
Overcast
-1°
3
Cloudy
1°
4
Overcast
-1°
5
Cloudy
-1°
6
Cloudy
1°
7
Sunny
4°
8
Cloudy
4°
9
Overcast
6°
10
Overcast
4°
11
Light snow
0°
12
Overcast
-1°
13
Overcast
-1°
14
Moderate or heavy snow showers
-4°
15
Sunny
1°
16
Sunny
6°
17
Mist
0°
18
Moderate rain
12°
19
Sunny
-1°
20
Patchy rain possible
10°
21
Sunny
3°
22
Sunny
5°
23
Sunny
12°
24
Sunny
6°
25
Light freezing rain
3°
26
Partly cloudy
-0°
27
Patchy moderate snow
-6°
28
Partly cloudy
0°
29
Moderate rain
10°
30
Mist
7°
31
Moderate snow
6°

Temperatures trend during December in Sangamon County

See the weather trend as well as the moving average line

December weather in Sangamon County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Sunny
Sunny
 0° /-7° 1.4 mm 0.4 cm
Dec. 2 Overcast
Overcast
 -1° /-5° 3.2 mm 2.3 cm
Dec. 3 Cloudy
Cloudy
 1° /-7° 0 mm 0 cm
Dec. 4 Overcast
Overcast
 -1° /-6° 0 mm 0 cm
Dec. 5 Cloudy
Cloudy
 -1° /-11° 0 mm 0 cm
Dec. 6 Cloudy
Cloudy
 1° /-4° 0 mm 0 cm
Dec. 7 Sunny
Sunny
 4° /-4° 0 mm 0 cm
Dec. 8 Cloudy
Cloudy
 4° /-3° 0 mm 0 cm
Dec. 9 Overcast
Overcast
 6° /-1° 0 mm 0 cm
Dec. 10 Overcast
Overcast
 4° /-2° 0 mm 0 cm
Dec. 11 Light snow
Light snow
 0° /-4° 0 mm 0 cm
Dec. 12 Overcast
Overcast
 -1° /-3° 0.4 mm 0 cm
Dec. 13 Overcast
Overcast
 -1° /-8° 9.2 mm 6.6 cm
Dec. 14 Moderate or heavy snow showers
Moderate or heavy snow showers
 -4° /-9° 25.3 mm 2.9 cm
Dec. 15 Sunny
Sunny
 1° /-20° 0 mm 0 cm
Dec. 16 Sunny
Sunny
 6° /-8° 0 mm 0 cm
Dec. 17 Mist
Mist
 0° /-1° 0 mm 0 cm
Dec. 18 Moderate rain
Moderate rain
 12° /-5° 13.7 mm 0 cm
Dec. 19 Sunny
Sunny
 -1° /-7° 0 mm 0 cm
Dec. 20 Patchy rain possible
Patchy rain possible
 10° /0° 2.2 mm 0 cm
Dec. 21 Sunny
Sunny
 3° /-2° 0 mm 0 cm
Dec. 22 Sunny
Sunny
 5° /-3° 0 mm 0 cm
Dec. 23 Sunny
Sunny
 12° /3° 0 mm 0 cm
Dec. 24 Sunny
Sunny
 6° /-1° 0 mm 0 cm
Dec. 25 Light freezing rain
Light freezing rain
 3° /-4° 0.3 mm 0 cm
Dec. 26 Partly cloudy
Partly cloudy
 0° /-8° 0 mm 0 cm
Dec. 27 Patchy moderate snow
Patchy moderate snow
 -6° /-10° 0.8 mm 0.6 cm
Dec. 28 Partly cloudy
Partly cloudy
 0° /-9° 0.1 mm 0.1 cm
Dec. 29 Moderate rain
Moderate rain
 10° /7° 11.2 mm 0 cm
Dec. 30 Mist
Mist
 7° /5° 0 mm 0 cm
Dec. 31 Moderate snow
Moderate snow
 6° /0° 17.2 mm 1.7 cm
Next
Important Notice
Our weather forecast for Sangamon County in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sangamon County forecast closer to your planned date for the most up-to-date weather information.
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Sangamon County in December - FAQ

What are the expected maximum and minimum temperatures in Sangamon County during December?
Brace for cold days with temperatures not exceeding 4° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Sangamon County during December?
Significant rainfall exceeding 121.5 mm is expected in Sangamon County during December, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Sangamon County in December 2025?
Sangamon County experiences an average snowfall of 7.58 cm during December, occurring over 2 days.
What are the typical wind conditions in Sangamon County during December?
The average wind speed in Sangamon County during December is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

Sangamon County snow forecast December 2025

Track daily snowfall levels and discover Sangamon County’s snowy potential this December ❄️
On average, Sangamon County sees 2 snowy days during December, with approximately 7.6 cm of total snowfall.

December rainfall patterns in Sangamon County

Explore the daily rainfall trends and prepare for Sangamon Countys December weather 💧
Typically, Sangamon County has 5 rainy days in December with a total of 121.5 mm of rainfall.
Top locations in Sangamon County
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Springfield
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Location coordinates Where is Sangamon County?

Get accurate weather forecasts for Sangamon County, located at latitude 39.802 and longitude -89.644. Stay updated with localized weather information tailored for Sangamon County.

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