Live Weather & Forecast
Weather in Mattoon
Illinois, United States · Real-time conditions & 3-day outlook
22°C
Feels like 22°C
71°F / Feels 71°F
Light rain
Mattoon, Illinois
🌞 Daytime
Updated: 2026-04-14 09:30
Humidity
79%
Wind
24.8 km/h SSW
Wind Gust
33 km/h
Pressure
1014 mb
Visibility
14 km
UV Index
2
(Low)
Precipitation
2.85 mm
Cloud Cover
75%
Dew Point
17.7°C
Wind Degree
200°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
139.9 μg/m³
NO₂
1.8 μg/m³
O₃
98 μg/m³
SO₂
1.4 μg/m³
PM 2.5
6 μg/m³
PM 10
6.5 μg/m³
Today's Hourly Forecast
24-hour breakdown for Mattoon, Illinois
12 AM
20°
Clear
1 AM
20°
Clear
2 AM
20°
Clear
3 AM
20°
Clear
4 AM
20°
Clear
5 AM
19°
Clear
6 AM
19°
Clear
7 AM
20°
Sunny
8 AM
20°
Sunny
9 AM
22°
Light rain
10 AM
23°
Sunny
11 AM
25°
Sunny
12 PM
26°
Partly Cloudy
1 PM
28°
Partly Cloudy
2 PM
29°
Sunny
3 PM
30°
Sunny
4 PM
30°
Sunny
5 PM
28°
Sunny
6 PM
26°
Thundery outbreaks in nearby
7 PM
25°
Light rain shower
8 PM
24°
Clear
9 PM
23°
Clear
10 PM
23°
Clear
11 PM
22°
Thundery outbreaks in nearby
3-Day Forecast
Daily overview for Mattoon, Illinois
Today
Patchy rain nearby
31°
/
19°
🌧️ 85% chance of rain
💧 Avg. humidity: 74%
💨 Max wind: 30.6 km/h
🌧️ Total precip: 4.33 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:17 AM
🌇 Sunset: 07:30 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Moderate rain
24°
/
18°
🌧️ 89% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 29.2 km/h
🌧️ Total precip: 17.75 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:16 AM
🌇 Sunset: 07:31 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Patchy rain nearby
25°
/
18°
🌧️ 69% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 30.2 km/h
🌧️ Total precip: 3.8 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:14 AM
🌇 Sunset: 07:32 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Best Time to Visit Mattoon
Plan your trip to Mattoon, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Mattoon?
Current conditions in Mattoon: Light rain, temperature 22°C, humidity 79%.
What is the best time to visit Mattoon?
The best time to visit Mattoon is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Mattoon?
Mattoon is located at approximately 39.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Mattoon?
The wettest period in Mattoon is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Mattoon?
For visits to Mattoon during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Mattoon in?
Mattoon is located in United States, in the state of Illinois.
What are the public holidays in Mattoon in 2026?
View the 2026 public holidays for Mattoon on our Holidays page.
What are the GPS coordinates used for the weather forecast in Mattoon?
The weather forecast for Mattoon uses coordinates 39.4843, -88.3773.