Ontario, WI Weather Forecast
Local 7-day forecast
Rain Showers Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Ontario, WI in one place.
Rain showers likely. Partly sunny, with a high near 54. West wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Ontario, WI is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 14, 2026 2:04 AM CDT.
The active forecast window currently covers Apr 18 to Apr 20, 2026 for Ontario, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 20, 2026
- Latest sync
- Apr 14, 2026 2:04 AM CDT
- Forecast office
- ARX
- Source
- NOAA / NWS
Daily Outlook
This Week in Ontario
Monday looks like the warmest upcoming period in Ontario at 57 degrees F.
Sunday Night is the coolest period ahead with temperatures near 28 degrees F.
The strongest winds are forecast for Saturday at about 13 to 18 mph W.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 14, 2026 2:04 AM CDT
- Coverage
- 3 days
- Time zone
- America/Chicago
- Forecast office
- ARX
- Radar station
- KARX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain showers before 7pm, then a slight chance of snow showers between 7pm and 1am. Mostly cloudy, with a low around 29. West wind 12 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Mostly sunny, with a high near 47. Northwest wind 12 to 15 mph, with gusts as high as 25 mph.
Mostly clear, with a low around 28. West wind 5 to 10 mph, with gusts as high as 18 mph.
Sunny, with a high near 57. South wind 5 to 9 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Rain Showers Likely
|
54°F |
13 to 18 mph
W
|
|
Saturday Night
Apr 18
|
Slight Chance Snow Showers
|
29°F |
12 to 17 mph
W
|
|
Sunday
Apr 19
|
Mostly Sunny
|
47°F |
12 to 15 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
28°F |
5 to 10 mph
W
|
|
Monday
Apr 20
|
Sunny
|
57°F |
5 to 9 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ontario.