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St. Simon School, IL Weather Forecast
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| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Showers Likely | Chance of Showers | Chance of Showers |
| Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 71°FHi: 22°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C |
| POP: 70% | POP: 50% | POP: 40% | POP: 60% | POP: 50% | POP: 20% | POP: 30% | POP: 40% | POP: 50% | POP: 70% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 631 AM CDT Tue Sep 15 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 650 AM CDT Tue Sep 15 2026
Key Messages
- Waves of showers and storms are expected in the general region through much of the week.
- While some areas may not see much rain at all, others may experience repeated downpours with a threat for localized flooding.
- The next few days will also be marked by high humidity.
- A gradual pattern change toward cooler, less humid, and drier conditions is favored by next week.
Discussion
... Issued at 307 AM CDT Tue Sep 15 2026
The main focus continues to revolve around the timing and favored plac...