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Tall Tree Lake, IL Weather Forecast
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Tall Tree Lake Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | THURSDAY |
 | |  |  | | |  |  | | | |
| Patchy Fog | Patchy Fog | Mostly Clear | Mostly Sunny | Mostly Clear | Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Sunny |
| Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°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 |
POP = Probability of Precipitation.
Weather Outlook Updated: 632 PM CDT Thu Aug 20 2026 
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Tall Tree Lake Forecast Discussion
Issued: 720 PM CDT Thu Aug 20 2026
Key Messages
- Temperatures will generally be a few degrees below normal over the next week. Expect highs in the 80s and lows in the 60s.
- Intermittent small chances (15-30%) of showers and thunderstorms are forecast from Saturday through much of next week.
Discussion
... Issued at 207 PM CDT Thu Aug 20 2026
A weak cold front has been slow to move south into/through the Quad State today. A few showers have recently developed along it from near Evansville Indiana to near Be...