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Castleton Weather Forecast
| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY |
 |  | |  |  | | | |  | |  |
| Partly Cloudy | Partly Sunny | Partly Cloudy | Mostly Sunny | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C Lo: 49°FLo: 9°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C Lo: 50°FLo: 10°C | Hi: 75°FHi: 24°C Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C |
| POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 127 AM CDT Sat Oct 24 2026 
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Issued: 150 AM CDT Sat Oct 24 2026
Key Messages
- Sunny, mild days and cool nights persist across central and southeast Illinois through the next week, with highs in the 70s and lows in the upper 40s to low 50s.
- Tranquil weather will continue for several more days, with the only meaningful chance of rain toward next weekend.
Discussion
... Issued at 150 AM CDT Sat Oct 24 2026
The blocking pattern continues over the eastern half of the United States. A low pressure system is moving well off to the north of central IL, up in Canada, this...