Ontario, CA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Ontario, CA in one place.
Sunny, with a high near 95. South wind 0 to 15 mph, with gusts as high as 25 mph.
Local Weather Overview
This forecast page for Ontario, CA 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 8, 2026 7:06 AM PDT.
The active forecast window currently covers Jul 9 to Jul 14, 2026 for Ontario, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 9 to Jul 14, 2026
- Latest sync
- Jul 8, 2026 7:06 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Ontario
Thursday looks like the warmest upcoming period in Ontario at 95 degrees F.
Thursday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Thursday at about 0 to 15 mph S.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 8, 2026 7:06 AM PDT
- Coverage
- 6 days
- Time zone
- America/Los_Angeles
- Forecast office
- SGX
- Radar station
- KSOX
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 64. Southwest wind 0 to 15 mph, with gusts as high as 25 mph.
Sunny, with a high near 92.
Patchy fog after 5am. Partly cloudy, with a low around 64.
Patchy fog before 11am. Mostly sunny, with a high near 91.
A slight chance of rain showers after 5am. Partly cloudy, with a low around 65.
A slight chance of rain showers before 11am. Partly sunny, with a high near 90.
A slight chance of rain showers after 11pm. Partly cloudy, with a low around 65.
A slight chance of rain showers before 11am. Mostly sunny, with a high near 93.
Mostly clear, with a low around 67.
Sunny, with a high near 95.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 9
|
Sunny
|
95°F |
0 to 15 mph
S
|
|
Thursday Night
Jul 9
|
Mostly Clear
|
64°F |
0 to 15 mph
SW
|
|
Friday
Jul 10
|
Sunny
|
92°F |
0 to 10 mph
SW
|
|
Friday Night
Jul 10
|
Partly Cloudy then Patchy Fog
|
64°F |
0 to 10 mph
SW
|
|
Saturday
Jul 11
|
Patchy Fog then Mostly Sunny
|
91°F |
0 to 10 mph
SW
|
|
Saturday Night
Jul 11
|
Partly Cloudy then Slight Chance Rain Showers
|
65°F |
0 to 10 mph
SW
|
|
Sunday
Jul 12
|
Slight Chance Rain Showers then Partly Sunny
|
90°F |
0 to 10 mph
SW
|
|
Sunday Night
Jul 12
|
Slight Chance Rain Showers
|
65°F |
0 to 10 mph
W
|
|
Monday
Jul 13
|
Slight Chance Rain Showers then Mostly Sunny
|
93°F |
0 to 10 mph
SW
|
|
Monday Night
Jul 13
|
Mostly Clear
|
67°F |
0 to 10 mph
W
|
|
Tuesday
Jul 14
|
Sunny
|
95°F |
0 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ontario.
