Ontario, IL Weather Forecast
Local 7-day forecast
Slight Chance Light Rain
Track current conditions, temperature changes, wind, and the full daily outlook for Ontario, IL in one place.
A slight chance of rain. Cloudy, with a low around 54. East southeast wind around 6 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Ontario, IL 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: Nov 1, 2026 1:02 AM CST.
The active forecast window currently covers Nov 1 to Nov 7, 2026 for Ontario, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 1 to Nov 7, 2026
- Latest sync
- Nov 1, 2026 1:02 AM CST
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Ontario
Tuesday looks like the warmest upcoming period in Ontario at 72 degrees F.
Friday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Tuesday at about 18 to 23 mph S.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Nov 1, 2026 1:02 AM CST
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KDVN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of rain before 5pm. Cloudy, with a high near 61. Southeast wind 6 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Patchy fog after midnight. Mostly cloudy, with a low around 54. Southeast wind around 9 mph, with gusts as high as 23 mph.
A chance of rain and patchy fog before 8am, then a chance of rain and patchy fog between 8am and 4pm. Cloudy, with a high near 68. South southeast wind 13 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Rain likely. Cloudy, with a low around 60. South southeast wind around 21 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Rain and a slight chance of thunderstorms. Mostly cloudy, with a high near 72. South wind 18 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Rain likely. Mostly cloudy, with a low around 53. South southwest wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
A chance of rain. Partly sunny, with a high near 65. Chance of precipitation is 40%.
A slight chance of rain before midnight. Mostly cloudy, with a low around 48.
A slight chance of rain. Mostly cloudy, with a high near 64.
A slight chance of rain after midnight. Mostly cloudy, with a low around 47.
A slight chance of rain. Mostly cloudy, with a high near 63.
Mostly cloudy, with a low around 44.
Partly sunny, with a high near 63.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Nov 1
|
Slight Chance Light Rain
|
54°F |
6 mph
ESE
|
|
Sunday
Nov 1
|
Slight Chance Light Rain
|
61°F |
6 to 9 mph
SE
|
|
Sunday Night
Nov 1
|
Mostly Cloudy then Patchy Fog
|
54°F |
9 mph
SE
|
|
Monday
Nov 2
|
Chance Light Rain
|
68°F |
13 to 20 mph
SSE
|
|
Monday Night
Nov 2
|
Light Rain Likely
|
60°F |
21 mph
SSE
|
|
Tuesday
Nov 3
|
Light Rain
|
72°F |
18 to 23 mph
S
|
|
Tuesday Night
Nov 3
|
Light Rain Likely
|
53°F |
9 to 17 mph
SSW
|
|
Wednesday
Nov 4
|
Chance Light Rain
|
65°F |
7 to 12 mph
WSW
|
|
Wednesday Night
Nov 4
|
Slight Chance Light Rain then Mostly Cloudy
|
48°F |
6 mph
W
|
|
Thursday
Nov 5
|
Slight Chance Light Rain
|
64°F |
5 to 8 mph
NW
|
|
Thursday Night
Nov 5
|
Mostly Cloudy then Slight Chance Light Rain
|
47°F |
5 mph
NNW
|
|
Friday
Nov 6
|
Slight Chance Light Rain
|
63°F |
5 to 8 mph
NNW
|
|
Friday Night
Nov 6
|
Mostly Cloudy
|
44°F |
5 mph
NNW
|
|
Saturday
Nov 7
|
Partly Sunny
|
63°F |
2 to 6 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ontario.