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Brimfield, IL Weather Forecast
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Brimfield Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  | |  |  |  | | | | | | |
| Chance of T-Storm | Chance of Showers | Chance of T-Storm | Showers | Mostly Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Clear | Clear | Mostly Clear | Mostly Clear |
| Hi: 71°FHi: 22°C | Lo: 65°FLo: 18°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C |
| POP: 100% | POP: 50% | POP: 90% | POP: 90% |
POP = Probability of Precipitation.
Weather Outlook Updated: 412 AM CDT Wed Sep 30 2026 
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Issued: 313 AM CDT Wed Sep 30 2026
Key Messages
- Scattered Showers Today: Rain showers focused north of Interstate 72 will exit the area by midday. While rain totals will mostly stay under 0.75", localized amounts exceeding 1" are possible northwest of the Illinois River Valley. Highs south of I-72 will reach the mid to upper 80s.
- Heavy Rainfall Thursday-Friday: Multiple rounds of widespread rain return Thursday afternoon through Friday morning, with 0.25" to 1.25" anticipated across most areas east of the Illinois River. Narrow, h...