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Exposition Gardens Weather Forecast
| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | | | | | |  | |  |  | |
| Clear | Sunny | Mostly Clear | Sunny | Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy |
| Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C Lo: 50°FLo: 10°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Lo: 45°FLo: 7°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1242 AM CDT Wed Oct 21 2026 
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Issued: 1240 AM CDT Wed Oct 21 2026
Key Messages
- Dry conditions and tranquil weather prevail across central and southeast Illinois through this weekend.
- Above normal temperatures will dominate the region, with afternoon highs climbing into the mid to upper 70s.
Discussion
... Issued at 1233 PM CDT Tue Oct 20 2026
Expansive surface high pressure centered south of James Bay extends southwest into the mid and lower Mississippi Valley this afternoon. Broad subsidence and very dry air below 500 mb will lead to clear skies through tonight. ...