Ontario, WI Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Ontario, WI in one place.
Sunny, with a high near 87. Northwest wind 5 to 8 mph.
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: Jul 16, 2026 9:46 PM CDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Ontario, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 16, 2026 9:46 PM CDT
- Forecast office
- ARX
- Source
- NOAA / NWS
Daily Outlook
This Week in Ontario
Monday looks like the warmest upcoming period in Ontario at 88 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Tuesday at about 7 to 13 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 16, 2026 9:46 PM CDT
- Coverage
- 6 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
Mostly clear, with a low around 62. Northeast wind 1 to 7 mph.
Sunny, with a high near 86. Southeast wind around 2 mph.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. South wind 2 to 6 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Southwest wind 6 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65. Northwest wind 3 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Sunny, with a high near 81. Northwest wind 7 to 13 mph, with gusts as high as 23 mph.
Mostly clear, with a low around 56. North wind 0 to 10 mph, with gusts as high as 22 mph.
Sunny, with a high near 77. Northwest wind 0 to 5 mph.
Mostly clear, with a low around 56. Northwest wind around 2 mph.
Sunny, with a high near 81. Southwest wind 0 to 3 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Sunny
|
87°F |
5 to 8 mph
NW
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
62°F |
1 to 7 mph
NE
|
|
Sunday
Jul 19
|
Sunny
|
86°F |
2 mph
SE
|
|
Sunday Night
Jul 19
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
65°F |
2 to 6 mph
S
|
|
Monday
Jul 20
|
Chance Showers And Thunderstorms
|
88°F |
6 to 12 mph
SW
|
|
Monday Night
Jul 20
|
Slight Chance Showers And Thunderstorms
|
65°F |
3 to 8 mph
NW
|
|
Tuesday
Jul 21
|
Sunny
|
81°F |
7 to 13 mph
NW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
56°F |
0 to 10 mph
N
|
|
Wednesday
Jul 22
|
Sunny
|
77°F |
0 to 5 mph
NW
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
56°F |
2 mph
NW
|
|
Thursday
Jul 23
|
Sunny
|
81°F |
0 to 3 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ontario.