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Hagarstown, IL Weather Forecast
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Hagarstown Weather Forecast
| THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY |
 |  |  |  | | | | |  |  |  | |
| Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 91°FHi: 33°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C |
| POP: 30% | POP: 20% | POP: 40% | POP: 60% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 202 PM CDT Fri Sep 18 2026 
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Issued: 153 PM CDT Fri Sep 18 2026
Key Messages
- Near record warm temperatures will continue through Saturday, but heat relief will slowly spread south Sunday and Monday behind a cold front. Below to near-average temperatures can be expected Tuesday-Thursday.
- A few showers and thunderstorms are expected this afternoon (20-30%), but more substantial rain chances (60-80%) arrive Sunday and Monday as a cold front moves through the area.
Aviation
/12Z TAFS THROUGH 18Z SATURDAY/... Issued at 1145 AM CDT Fri Sep 18 2026
VFR conditions are e...