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Rock River, IL Weather Forecast
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Rock River Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  |  |  |  | | | |  |  | |
| Isolated Showers | Scattered Showers | Isolated Showers | Chance of Showers | Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 59°FHi: 15°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 49°FHi: 9°C | Lo: 31°FLo: -1°C | Hi: 55°FHi: 13°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 70°FHi: 21°C |
| POP: 20% | POP: 90% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 456 AM CDT Thu Oct 15 2026 
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Issued: 627 AM CDT Thu Oct 15 2026
Key Messages
- A fall storm system will move through the area today and Friday bringing periods of rain showers and gusty northwesterly winds (the latter primarily on Friday).
- Frosty and near-freezing conditions are favored away from Lake Michigan Friday night into Saturday and again Saturday night.
- After the brief period of chilly weather, there will be a warming trend this weekend into early next week.
Discussion
... Issued at 308 AM CDT Thu Oct 15 2026
Though Tonight:
Per recent GOES-19 water vapor ...