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Petite Lake, IL Weather Forecast
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Petite Lake Weather Forecast
| LATE THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  |  | | | |  |  | |  |  |
| Chance of T-Storm | Clearing | Partly Cloudy | Mostly Cloudy | Clearing | Partly Cloudy | Partly Cloudy | Chance of T-Storm | Mostly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 61°FHi: 16°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C |
| POP: 40% | POP: 50% | POP: 30% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 336 PM CDT Fri Oct 09 2026 
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Issued: 213 PM CDT Fri Oct 9 2026
Key Messages
- Scattered showers with an isolated thunderstorm possible through the end of the afternoon.
- Chance of showers Saturday night/Sunday morning east of I-55.
- Active pattern next week with showers and possible thunderstorms, then turning colder into next weekend.
Discussion
... Issued at 213 PM CDT Fri Oct 9 2026
Widely scattered showers are moving across parts of northern IL early this afternoon. These showers have largely formed along an elevated baroclinic zone on the leading edge of a war...