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Weather in Decatur, Illinois for March 2026

Your guide to Decatur weather in March - trends and predictions

    Official Weather Alert ⚠️

  • Wind Advisory - See hour by hour.

    • Snow Forecast ❄️

  • With an average of 2 snowy days, Decatur usually enjoys a light touch of snow in March.
    According to Decatur snow forecast for March 2026, 1 snowy day is expected until the end of the month at Wednesday, March 18.

    • Temperatures

  • Until now, March 2026 in Decatur is slightly cooler than the historical average by -0.8 °F.

  • The forecast for the next days in Decatur predicts temperatures to be around 14 °F, close to the historical average.

  • In general, the average temperature in Decatur at the beginning of March is 11.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 15 °F by the end of March.

    • Rain 🌧️

  • The climate of Decatur in March is notably wet, with an average of 14 rainy days, and a total of 171.4 mm of precipitation.

    • More

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

Average dry days
15
Dry days
Average rainy days
14
Rainy days
Average snowy days
2
Snow days
Average temperatures
13°/4°
Temperatures
Average wind speed
28 km/h
Avg max wind
Average humidity
70 %
Avg humidity

Decatur Weather March

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

Temperatures trend during March in Decatur

See the weather trend as well as the moving average line

March weather in Decatur day by day

Click on a date for more information
February April
Date Weather Temperatures Rain Snow More
Mar. 1 Overcast
Overcast
 5° /-1° 0.4 mm 0 cm
Mar. 2 Mist
Mist
 8° /-1° 3.4 mm 0.7 cm
Mar. 3 Sunny
Sunny
 11° /2° 2.3 mm 0 cm
Mar. 4 Thundery outbreaks possible
Thundery outbreaks possible
 15° /7° 37.3 mm 0 cm
Mar. 5 Light rain shower
Light rain shower
 14° /4° 27.4 mm 1.1 cm
Mar. 6 Partly cloudy
Partly cloudy
 15° /3° 0 mm 0 cm
Mar. 7 Patchy rain possible
Patchy rain possible
 10° /4° 1.7 mm 0 cm
Mar. 8 Light rain shower
Light rain shower
 13° /4° 12.1 mm 0 cm
Mar. 9 Light drizzle
Light drizzle
 14° /1° 0.9 mm 0 cm
Mar. 10 Sunny
Sunny
 17° /5° 1.9 mm 0 cm
Mar. 11 Sunny
Sunny
 18° /3° 10.7 mm 0 cm
Mar. 12 Overcast
Overcast
 16° /2° 0.1 mm 0 cm
Mar. 13 Patchy rain possible
Patchy rain possible
 16° /6° 0.9 mm 0 cm
Mar. 14 Patchy light rain with thunder
Patchy light rain with thunder
 21° /13° 10 mm 0 cm
Mar. 15 Moderate rain
Moderate rain
 17° /1° 12.8 mm 0 cm
Mar. 16 Moderate or heavy snow showers
Moderate or heavy snow showers
 -1° /-10° 3.3 mm 0 cm
Mar. 17 Partly cloudy
Partly cloudy
 4° /-9° 0 mm 0 cm
Mar. 18 Patchy rain possible
Patchy rain possible
 10° /-1° 2.8 mm 0.1 cm
Mar. 19 Partly cloudy
Partly cloudy
 13° /0° 0 mm 0 cm
Mar. 20 Sunny
Sunny
 21° /7° 0 mm 0 cm
Mar. 21 Sunny
Sunny
 25° /11° 0 mm 0 cm
Mar. 22 Sunny
Sunny
 28° /15° 0 mm 0 cm
Mar. 23 Overcast
Overcast
 15° /6° 0 mm 0 cm
Mar. 24 Overcast
Overcast
 6° /2° 0 mm 0 cm
Mar. 25 Sunny
Sunny
 10° /-2° 0 mm 0 cm
Mar. 26 Sunny
Sunny
 18° /6° 0 mm 0 cm
Mar. 27 Sunny
Sunny
 13° /4° 0 mm 0 cm
Mar. 28 Partly cloudy
Partly cloudy
 19° /4° 0 mm 0 cm
Mar. 29 Overcast
Overcast
 17° /10° 0.3 mm 0 cm
Mar. 30 Patchy rain possible
Patchy rain possible
 18° /13° 38 mm 0 cm
Mar. 31 Light rain shower
Light rain shower
 10° /6° 2.2 mm 0 cm
Next
Important Notice
Our weather forecast for Decatur in March 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 March - FAQ

What are the expected maximum and minimum temperatures in Decatur during March?

Prepare for cooler days with highs just around 13° and colder nights, dipping below 4°.

How much rainfall should be expected in Decatur during March?

Significant rainfall exceeding 171.4 mm is expected in Decatur during March, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Decatur in March 2026?

Decatur experiences an average snowfall of 2.89 cm during March, occurring over 2 days.

What are the typical wind conditions in Decatur during March?

The average wind speed in Decatur during March is 28 km/h, suggesting breezy to windy conditions, depending on your activities.

Decatur snow forecast March 2026

Track daily snowfall levels and discover Decatur’s snowy potential this March ❄️
On average, Decatur sees 2 snowy days during March, with approximately 2.9 cm of total snowfall.

March rainfall patterns in Decatur

Explore the daily rainfall trends and prepare for Decaturs March weather 💧
Typically, Decatur has 14 rainy days in March with a total of 171.4 mm of rainfall.

UV exposure in Decatur during March

Stay informed about UV levels for safe outdoor activities throughout the month of March ☀️

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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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