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Waterloo School Weather Forecast
| REST OF TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 | |  |  |  |  | | | |  | | |
| Rain Showers | Rain Showers | Chance of Showers | Mostly Clear | Partly Sunny | Partly Cloudy | Partly Sunny | Partly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 61°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C |
| POP: 20% | POP: 50% | POP: 40% | POP: 20% | POP: 20% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 132 PM CDT Mon Sep 21 2026 
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Issued: 1254 PM CDT Mon Sep 21 2026
Key Messages
- A prolonged period of high swim risk conditions continues into early Wednesday evening for all beaches along Lake Michigan.
- Scattered light rain showers are expected roughly along and west of a line from Madison to Janesville this evening into early Tuesday.
- Below normal temps are expected for the first half of the week, with gradually warming temps into the weekend.
Aviation
... Issued 1254 PM CDT Mon Sep 21 2026
Latest guidance continues to show shower chances this evening into early ...