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Speer, IL Weather Forecast
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Speer Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  | | |  | | |  | | |  | |
| Partly Cloudy | Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Sunny | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Sunny | Chance of Showers | Partly Cloudy |
| Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Hi: 91°FHi: 33°C Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C Lo: 65°FLo: 18°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C Lo: 61°FLo: 16°C |
| POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 437 PM CDT Fri Sep 04 2026 
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Issued: 605 PM CDT Fri Sep 4 2026
Key Messages
- Dangerous Heat Saturday: Heat index values will reach to around 105 degrees again on Saturday. The Extreme Heat Warning has been expanded to cover all of central Illinois.
- Brief Weekend Relief: A cold front pushing south will bring slight less hot and humid conditions to northern areas Sunday and Monday, dropping highs into the mid-to-upper 80s. Southern areas will remain warmer in the low 90s.
- Heat Returns Next Week: The brief break in oppressive heat will be short-lived. Widespread...