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United States weather

Weather in Winnebago County, Illinois for December 2026

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

    Snow Forecast ❄️

  • Winnebago County typically experiences moderate snowfall in December, with an average of 10 snowy days.

    • Temperatures

  • In general, the average temperature in Winnebago County at the beginning of December is 0.7 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 3.3 °C by the end of December.

    • More

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

Average dry days
13
Dry days
Average rainy days
8
Rainy days
Average snowy days
10
Snow days
Average temperatures
1°/-4°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
81 %
Avg humidity

Winnebago County Weather December

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

Temperatures trend during December in Winnebago County

See the weather trend as well as the moving average line

December weather in Winnebago County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Heavy snow
Heavy snow
 0° /-8° 7.1 mm 4.5 cm
Dec. 2 Fog
Fog
 0° /-5° 1.2 mm 0.7 cm
Dec. 3 Light snow
Light snow
 1° /-5° 7.6 mm 4.4 cm
Dec. 4 Mist
Mist
 -1° /-8° 0 mm 0 cm
Dec. 5 Heavy snow
Heavy snow
 -1° /-8° 1 mm 0.7 cm
Dec. 6 Overcast
Overcast
 1° /-6° 0 mm 0 cm
Dec. 7 Overcast
Overcast
 5° /-6° 6.4 mm 4.2 cm
Dec. 8 Overcast
Overcast
 3° /-3° 0.1 mm 0 cm
Dec. 9 Overcast
Overcast
 6° /-2° 5.1 mm 0 cm
Dec. 10 Overcast
Overcast
 1° /-3° 2.3 mm 0 cm
Dec. 11 Sunny
Sunny
 -1° /-8° 0 mm 0 cm
Dec. 12 Cloudy
Cloudy
 -3° /-7° 2 mm 1.4 cm
Dec. 13 Partly cloudy
Partly cloudy
 -2° /-10° 1.6 mm 1.1 cm
Dec. 14 Sunny
Sunny
 0° /-8° 3.7 mm 0.4 cm
Dec. 15 Cloudy
Cloudy
 2° /-5° 4.8 mm 0 cm
Dec. 16 Light rain
Light rain
 3° /-2° 4 mm 0 cm
Dec. 17 Fog
Fog
 3° /0° 0 mm 0 cm
Dec. 18 Light snow
Light snow
 1° /-3° 2.4 mm 1 cm
Dec. 19 Overcast
Overcast
 -2° /-8° 0 mm 0 cm
Dec. 20 Overcast
Overcast
 2° /-4° 0 mm 0 cm
Dec. 21 Patchy rain possible
Patchy rain possible
 0° /-6° 0.5 mm 0 cm
Dec. 22 Overcast
Overcast
 2° /-2° 3.6 mm 0 cm
Dec. 23 Fog
Fog
 4° /1° 0.3 mm 0 cm
Dec. 24 Cloudy
Cloudy
 5° /1° 0 mm 0 cm
Dec. 25 Light rain
Light rain
 4° /2° 2.6 mm 0 cm
Dec. 26 Fog
Fog
 4° /0° 0.2 mm 0 cm
Dec. 27 Overcast
Overcast
 5° /0° 3.5 mm 0 cm
Dec. 28 Light drizzle
Light drizzle
 6° /2° 14.8 mm 0 cm
Dec. 29 Patchy rain possible
Patchy rain possible
 1° /-3° 0.3 mm 0 cm
Dec. 30 Overcast
Overcast
 2° /-4° 0 mm 0 cm
Dec. 31 Moderate or heavy snow showers
Moderate or heavy snow showers
 1° /-3° 7.5 mm 5.4 cm
Next
Important Notice
Our weather forecast for Winnebago 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 Winnebago County forecast closer to your planned date for the most up-to-date weather information.
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Winnebago County in December - FAQ

What are the expected maximum and minimum temperatures in Winnebago County during December?

Brace for cold days with temperatures not exceeding 1° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in Winnebago County during December?

Moderate rainfall is anticipated in Winnebago County during December, with a total of 82.6 mm spread over approximately 8 days. Considering plans for rainy days is advisable.

Will it snow in Winnebago County in December 2026?

Winnebago County experiences an average snowfall of 23.8067 cm during December, occurring over 10 days.

What are the typical wind conditions in Winnebago County during December?

The average wind speed in Winnebago County during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

Winnebago County snow forecast December 2026

Track daily snowfall levels and discover Winnebago County’s snowy potential this December ❄️
On average, Winnebago County sees 10 snowy days during December, with approximately 23.8 cm of total snowfall.

December rainfall patterns in Winnebago County

Explore the daily rainfall trends and prepare for Winnebago Countys December weather 💧
Typically, Winnebago County has 8 rainy days in December with a total of 82.6 mm of rainfall.
Top locations in Winnebago County
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Rockford
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Location coordinates Where is Winnebago County?

Get accurate weather forecasts for Winnebago County, located at latitude 42.271 and longitude -89.094. Stay updated with localized weather information tailored for Winnebago County.

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