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Spencer Park Decatur, IL Weather Forecast
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Spencer Park Decatur Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY |
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| Chance of T-Storm | Chance of T-Storm | Sunny | Clearing | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy |
| Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C Lo: 71°FLo: 22°C |
| POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 622 AM CDT Wed Aug 26 2026 
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Issued: 622 AM CDT Wed Aug 26 2026
Key Messages
- Thunderstorms are expected to develop over central Illinois later this afternoon and evening. Damaging winds and large hail are the main threats.
- Comfortable and dry weather is anticipated Thursday through Saturday, followed by the return of summer-like heat early next week.
Discussion
... Issued at 202 AM CDT Wed Aug 26 2026
Water vapor imagery shows a strong ridge of high pressure anchored over the southwest US with a mid-level trough centered to the north of Lake Superior. At the sur...