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St. Mark School Weather Forecast
| THIS AFTERNOON | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  | |  | |  |  | | | |
| Partly Sunny | Partly Cloudy | Sunny | Mostly Clear | Mostly Sunny | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Showers | Showers | Chance of Showers | Partly Cloudy |
| Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Hi: 79°FHi: 26°C Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C Lo: 65°FLo: 18°C | Lo: 69°FLo: 21°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C |
| POP: 50% | POP: 80% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1237 PM CDT Sun Sep 27 2026 
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Issued: 1229 PM CDT Sun Sep 27 2026
Key Messages
- Quiet and tranquil weather continues across central Illinois through Monday night, with seasonable high temperatures in the mid-70s. Temperatures will warm into the lower 80s on Tuesday and Wednesday, with the next rain system arriving Wednesday night into Thursday.
- Widespread rain will fall Thursday and Friday. The exact location of the heaviest rainfall and total accumulations remain highly uncertain.
Discussion
... Issued at 318 AM CDT Sun Sep 27 2026
A blocking high will remain anch...