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Grabtree Park, IL Weather Forecast
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Grabtree Park Weather Forecast
| LATE THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  |  | | | | |  | | | |
| Isolated Showers | Clearing | Sunny | Clear | Sunny | Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Sunny | Mostly Clear |
| Hi: 51°FHi: 11°C | Lo: 35°FLo: 2°C | Hi: 59°FHi: 15°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 40°FLo: 4°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 70°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 201 PM CDT Fri Oct 16 2026 
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Issued: 133 PM CDT Fri Oct 16 2026
Key Messages
- Breezy and seasonably chilly conditions persist this afternoon with some scattered showers.
- East of Gary, lake enhanced showers this afternoon will transition to lake effect showers tonight with a slight chance of a thunderstorm near the shore late this afternoon/early this evening. Wind gusts to 45 mph possible near the northwest Indiana lakefront this afternoon/early evening.
- Coldest night of the season expected tonight with lows near/just below freezing across interior portions of...