Weather World
J Maddock, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
J Maddock Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  | |  |  |  | |  |  | | | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Mostly Cloudy | Chance of Showers | Partly Cloudy | Mostly Cloudy | Partly Cloudy | Mostly Cloudy | Partly Cloudy |
| Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C |
| POP: 100% | POP: 100% | POP: 60% | POP: 30% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 846 AM CDT Sat Sep 19 2026 
J Maddock Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
J Maddock Weather Map
J Maddock Quick Facts
J Maddock Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 635 AM CDT Sat Sep 19 2026
Key Messages
- A Flood Watch for flash flooding is in effect for much of northern Illinois and far northwest Indiana through early this afternoon.
- Periods of heavy rain and scattered thunderstorms through mid/late this morning and then a second wave of heavy rain and scattered thunderstorms tonight into Sunday. Localized flash flooding will be possible where the heaviest rains occur over the same areas.
- Below normal temps early/mid next week with low chances for showers.
Discussion
... Issued at 148 ...