Weather Alert
Chester Weather Warning NWS WEATHER ALERT FOR THE CHESTER, IL AREA - SHORTTERM FORECAST Issued: 1153 AM CDT Tue Sep 15 2026 Chester Weather Warning

World > North America > United States > Illinois > Chester   Chester, IL Weather City of Chester, IL

Chester, IL Weather Forecast

Feedback E-mail the Weather

Quick Weather Clicks

Chester, IL Weather Forecast

Current Conditions

Settings
Chester IL weather - Clear - 83°F
Clear
83°F
Updated 8:43 pm
Feels Like 91°F
Humidity 71%
Wind ESE 7 mph
Barometer  30.06 in
Dew Point 73°F
Chester IL weather - Clear - 28°C
Clear
28°C
Updated 8:43 pm
Feels Like 33°C
Humidity 71%
Wind ESE 11 km/h
Barometer  101.8 kPa
Dew Point 23°C
WX Settings

Chester Weather Forecast

TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT
Chester, IL Weather - Tonight Chance Of T-Storm Chester, IL Weather - Wednesday Chance Of T-Storm Chester, IL Weather - Wednesday Night Clearing Chester, IL Weather - Thursday Sunny Chester, IL Weather - Thursday Night Partly Cloudy Chester, IL Weather - Friday Mostly Clear Chester, IL Weather - Saturday Mostly Clear Chester, IL Weather - Saturday Night Chance Of Showers Chester, IL Weather - Sunday Chance Of T-Storm Chester, IL Weather - Sunday Night Chance Of T-Storm Chester, IL Weather - Monday Chance Of T-Storm Chester, IL Weather - Monday Night Chance Of Showers
Chance of T-Storm Chance of T-Storm Clearing Sunny Partly Cloudy Mostly Clear Mostly Clear Chance of Showers Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of Showers
Lo: 75°FLo: 24°C Hi: 95°FHi: 35°C
 Lo: 71°FLo: 22°C Hi: 99°FHi: 37°C
 Lo: 71°FLo: 22°C Hi: 95°FHi: 35°C
Lo: 71°FLo: 22°C		 Hi: 95°FHi: 35°C
Lo: 71°FLo: 22°C		 Lo: 71°FLo: 22°C Hi: 91°FHi: 33°C
 Lo: 69°FLo: 21°C Hi: 85°FHi: 29°C
 Hi: 81°FHi: 27°C
Lo: 61°FLo: 16°C
POP: 20% POP: 20% POP: 20% POP: 20% POP: 30% POP: 50% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 548 PM CDT Tue Sep 15 2026 Chester, IL Weather - WeatherWorld.com

Trending Headlines

Chester Radar Loop

Use the map search tool if you want to place a location marker on the radar map...

Chester Quick Facts

National Two Day Weather Forecast


E-mail the Chester Weather Forecast

Voice your opinion or tell us about page issues...

Chester Forecast Discussion

Meteorlogic Glosserator
Instant definitions for any meteorological term.

Issued: 653 PM CDT Tue Sep 15 2026

Key Messages

  • A late season heat wave with peak heat index values of 100-105F+ will continue through at least Friday along/south of I-70.
  • Widespread showers and thunderstorms are forecast tonight, mainly across northeast Missouri and west-central Illinois where locally heavy rainfall is possible. A few may also be strong to severe with damaging winds the main threat through this evening.

Aviation

/00Z TAFS THROUGH 06Z THURSDAY/... Issued at 653 PM CDT Tue Sep 15 2026

A cold front moving through the a...