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Webster, IL Weather Forecast
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Webster Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  | | | | | | | |  |  |
| Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Chance of Showers | Partly Cloudy |
| Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C |
| POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 726 PM CDT Fri Sep 04 2026 
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Issued: 627 PM CDT Fri Sep 4 2026
Key Messages
- Dangerous heat continues through Saturday, with peak heat indices of 100 to 110 degrees. Extreme heat warnings and heat advisories are in effect and have been extended.
- There remains a low risk (<15%) for isolated showers/storms this afternoon and Saturday afternoon/evening. There is a Marginal (level 1 of 5) risk for an isolated severe storm north of Hwy 20.
- Less humid Sunday/Monday, before heat and humidity returns mid-week. The overall pattern has a 55-70% probability of above normal temperatures through mid-September.
Aviation
/00Z TAFS THROUGH 00Z SATURDAY/... Issued at 613 PM CDT Fri Sep 4 2026
Currently, storms are occurring near KDBQ associa...