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Village of Ontario, WisconsinOntario, WI Weather Forecast
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Ontario Weather Forecast
| OVERNIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | FRIDAY | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
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| Chance of Showers | Partly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Cloudy | Partly Sunny |
| Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°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: 65°FHi: 18°C Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C |
| POP: 50% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1052 PM CDT Mon Sep 21 2026 
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Issued: 702 PM CDT Mon Sep 21 2026
Key Messages
- Periods of light rain today southwest of I-94, focused mainly south of I-90. Overall impacts should be limited with rainfall amounts generally of 1/2" or less.
- Cool and dry for much of the upcoming week with near to slightly below normal temperatures.
- Next chance of widespread rain arrives over the weekend, but details of rainfall amounts and placement remain sparse.
Discussion
... Issued at 1200 PM CDT Mon Sep 21 2026
Today - Tonight: Periods of Light Rain
A stacked mid to upper troposp...