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United States weather

Weather in Decatur, Illinois for January 2027

Your guide to Decatur weather in January - trends and predictions

    Snow Forecast ❄️

  • With an average of 4 snowy days, Decatur usually enjoys a light touch of snow in January.

    • Temperatures

  • In general, the average temperature in Decatur at the beginning of January is 0.7 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 0.6 °C by the end of January.

    • More

  • Is January a good time to visit Decatur? check out the best time to travel to Decatur page.

  • ✨ Is January a good time to visit Decatur? – Ask the AI Weatherman

Average dry days
23
Dry days
Average rainy days
4
Rainy days
Average snowy days
4
Snow days
Average temperatures
0°/-7°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Decatur Weather January

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

Temperatures trend during January in Decatur

See the weather trend as well as the moving average line

January weather in Decatur day by day

Click on a date for more information
December February
Date Weather Temperatures Rain Snow More
Jan. 1 Overcast
Overcast
 0° /-5° 0 mm 0 cm
Jan. 2 Overcast
Overcast
 2° /-2° 0 mm 0 cm
Jan. 3 Overcast
Overcast
 2° /-3° 0 mm 0 cm
Jan. 4 Overcast
Overcast
 -1° /-5° 0 mm 0 cm
Jan. 5 Light snow
Light snow
 0° /-3° 5.3 mm 2.1 cm
Jan. 6 Light rain
Light rain
 2° /-2° 9.3 mm 0.8 cm
Jan. 7 Mist
Mist
 0° /-4° 0.2 mm 0.2 cm
Jan. 8 Light rain
Light rain
 2° /-6° 4 mm 0 cm
Jan. 9 Light snow
Light snow
 7° /-2° 10.7 mm 1.6 cm
Jan. 10 Light snow
Light snow
 2° /-3° 2.7 mm 1.8 cm
Jan. 11 Light freezing rain
Light freezing rain
 1° /-5° 0.1 mm 0 cm
Jan. 12 Moderate rain
Moderate rain
 4° /-3° 8.7 mm 0 cm
Jan. 13 Light snow
Light snow
 1° /-8° 0.9 mm 0 cm
Jan. 14 Overcast
Overcast
 -4° /-11° 0 mm 0 cm
Jan. 15 Partly cloudy
Partly cloudy
 -6° /-12° 0 mm 0 cm
Jan. 16 Light snow
Light snow
 -3° /-9° 1.2 mm 0.9 cm
Jan. 17 Light snow
Light snow
 -1° /-8° 4.8 mm 0 cm
Jan. 18 Light snow
Light snow
 -2° /-10° 3.3 mm 1.1 cm
Jan. 19 Overcast
Overcast
 -6° /-15° 0.2 mm 0.1 cm
Jan. 20 Overcast
Overcast
 -6° /-15° 0 mm 0 cm
Jan. 21 Overcast
Overcast
 -4° /-11° 0 mm 0 cm
Jan. 22 Light snow
Light snow
 -1° /-9° 2.3 mm 0 cm
Jan. 23 Light rain
Light rain
 -2° /-8° 5.1 mm 0 cm
Jan. 24 Light rain
Light rain
 -4° /-9° 3.7 mm 1 cm
Jan. 25 Moderate rain
Moderate rain
 -1° /-5° 9.8 mm 4 cm
Jan. 26 Fog
Fog
 -2° /-7° 0 mm 0 cm
Jan. 27 Patchy rain possible
Patchy rain possible
 2° /-6° 0 mm 0 cm
Jan. 28 Patchy rain possible
Patchy rain possible
 -1° /-6° 0.7 mm 0 cm
Jan. 29 Overcast
Overcast
 2° /-5° 0 mm 0 cm
Jan. 30 Light snow showers
Light snow showers
 0° /-5° 0.7 mm 0 cm
Jan. 31 Sunny
Sunny
 3° /-5° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Decatur in January 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 Decatur forecast closer to your planned date for the most up-to-date weather information.
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Decatur in January - FAQ

What are the expected maximum and minimum temperatures in Decatur during January?
Brace for cold days with temperatures not exceeding 0° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in Decatur during January?
Moderate rainfall is anticipated in Decatur during January, with a total of 74 mm spread over approximately 4 days. Considering plans for rainy days is advisable.

Will it snow in Decatur in January 2027?
Decatur experiences an average snowfall of 13.7 cm during January, occurring over 4 days.

What are the typical wind conditions in Decatur during January?
The average wind speed in Decatur during January is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

Decatur snow forecast January 2027

Track daily snowfall levels and discover Decatur’s snowy potential this January ❄️
On average, Decatur sees 4 snowy days during January, with approximately 13.7 cm of total snowfall.

January rainfall patterns in Decatur

Explore the daily rainfall trends and prepare for Decaturs January weather 💧
Typically, Decatur has 4 rainy days in January with a total of 74 mm of rainfall.
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Location coordinates Where is Decatur?

Get accurate weather forecasts for Decatur, located at latitude 39.84 and longitude -88.955. Stay updated with localized weather information tailored for Decatur.

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