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Walpole, IL Weather Forecast
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Walpole Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY |
 |  | | |  | | | | | | |
| Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Sunny |
| Lo: 75°FLo: 24°C | Hi: 100°FHi: 38°C | Lo: 75°FLo: 24°C | Hi: 100°FHi: 38°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C Lo: 65°FLo: 18°C | Hi: 95°FHi: 35°C Lo: 65°FLo: 18°C | Hi: 95°FHi: 35°C Lo: 65°FLo: 18°C | Hi: 99°FHi: 37°C Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1047 PM CDT Thu Sep 03 2026 
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Issued: 1102 PM CDT Thu Sep 3 2026
Key Messages
- An Extreme Heat Warning remains in effect through Saturday for a prolonged dangerous heatwave with daily heat index values ranging from 103-110 degrees. There is a 30-70% chance of needing to extend advisory level heat headlines into Sunday over southeast Missouri and adjacent portions of southern Illinois and west Kentucky.
- Multiple consecutive days of near record high temperatures in the upper 90s to 100 degrees and several record warm overnight low temperatures in the mid to upper...