Weather WorldJohnson Lake, IL Weather Forecast
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Johnson Lake Weather Forecast
| THIS AFTERNOON | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  |  | |  |  | | | | | |
| Sunny | Mostly Clear | Chance of Showers | Chance of Showers | Showers | Mostly Cloudy | Mostly Cloudy | Showers Likely | Showers | Showers | Chance of Showers | Chance of Showers |
| Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 60°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C |
| POP: 50% | POP: 70% | POP: 70% | POP: 60% | POP: 70% | POP: 80% | POP: 70% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 126 PM CDT Thu Oct 29 2026 
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Issued: 624 PM CDT Thu Oct 29 2026
Key Messages
- A cool, dry night is expected tonight in the wake of a cold front that has largely exited our region this afternoon.
- Rain chances return Friday and Saturday (peaking at 60-90% chances Friday night) with isolated storms possible Friday and Friday night.
- A more active weather pattern looks to develop early next week, bringing rain and breezy conditions for Election Day.
Aviation
/00Z TAFS THROUGH 00Z SATURDAY/... Issued at 623 PM CDT Thu Oct 29 2026
VFR to possibly MVFR conditions are exp...