Live Weather & Forecast
Weather in Chester
Illinois, United States · Real-time conditions & 3-day outlook
25°C
Feels like 26°C
76°F / Feels 79°F
Overcast
Chester, Illinois
🌞 Daytime
Updated: 2026-04-13 13:00
Humidity
66%
Wind
24.8 km/h SSW
Wind Gust
30.1 km/h
Pressure
1017 mb
Visibility
16 km
UV Index
8.3
(Very High)
Precipitation
0 mm
Cloud Cover
100%
Dew Point
19.8°C
Wind Degree
202°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
139.9 μg/m³
NO₂
2.6 μg/m³
O₃
81 μg/m³
SO₂
1.3 μg/m³
PM 2.5
4.9 μg/m³
PM 10
5.2 μg/m³
Today's Hourly Forecast
24-hour breakdown for Chester, Illinois
12 AM
22°
Clear
1 AM
21°
Clear
2 AM
21°
Clear
3 AM
21°
Clear
4 AM
20°
Clear
5 AM
20°
Clear
6 AM
21°
Clear
7 AM
21°
Overcast
8 AM
22°
Overcast
9 AM
23°
Cloudy
10 AM
23°
Overcast
11 AM
25°
Overcast
12 PM
26°
Partly Cloudy
1 PM
25°
Overcast
2 PM
29°
Sunny
3 PM
29°
Partly Cloudy
4 PM
30°
Sunny
5 PM
30°
Sunny
6 PM
28°
Sunny
7 PM
27°
Sunny
8 PM
25°
Clear
9 PM
24°
Clear
10 PM
24°
Clear
11 PM
23°
Clear
3-Day Forecast
Daily overview for Chester, Illinois
Today
Sunny
31°
/
19°
🌧️ 0% chance of rain
💧 Avg. humidity: 66%
💨 Max wind: 27.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.9
🌅 Sunrise: 06:27 AM
🌇 Sunset: 07:34 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
28°
/
20°
🌧️ 0% chance of rain
💧 Avg. humidity: 78%
💨 Max wind: 31.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:25 AM
🌇 Sunset: 07:35 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Cloudy
26°
/
19°
🌧️ 0% chance of rain
💧 Avg. humidity: 75%
💨 Max wind: 24.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:24 AM
🌇 Sunset: 07:36 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Chester
Plan your trip to Chester, 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 Chester?
Current conditions in Chester: Overcast, temperature 25°C, humidity 66%.
What is the best time to visit Chester?
The best time to visit Chester is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Chester?
Chester is located at approximately 37.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Chester?
The wettest period in Chester is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Chester?
For visits to Chester during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Chester in?
Chester is located in United States, in the state of Illinois.
What are the public holidays in Chester in 2026?
View the 2026 public holidays for Chester on our Holidays page.
What are the GPS coordinates used for the weather forecast in Chester?
The weather forecast for Chester uses coordinates 37.9137, -89.8221.