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Jacobs Chapel Historical, IL Weather Forecast
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Jacobs Chapel Historical Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  | |  | | | |  |  | |  | |
| Mostly Sunny | Mostly Clear | Mostly Sunny | Chance of Showers | Mostly Sunny | Mostly Clear | Mostly Clear | Partly Cloudy | Chance of T-Storm | Chance of Showers | Partly Sunny | Partly Cloudy |
| Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C | Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C |
| POP: 40% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1017 AM CDT Sat Aug 15 2026 
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Issued: 106 AM CDT Sat Aug 15 2026
Key Messages
- An Extreme Heat Warning continues thru the weekend with Heat Indices peaking in the triple digits up to near 115 degrees.
- Storm chances, including strong storm chances, are best with frontal passages Sunday night and Wednesday night. Both frontal passages bring cooler temperatures and lower humidity.
Discussion
... Issued at 100 AM CDT Fri Aug 14 2026
Strong high pressure keeps us baking thru the weekend. Highs yesterday were largely in the mid-upper 90s, w...