Ontario, CA Weather Forecast
Local 7-day forecast
Mostly Sunny then Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Ontario, CA in one place.
A slight chance of rain showers after 5pm. Mostly sunny, with a high near 75. Southwest wind 0 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
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: Apr 9, 2026 12:45 AM PDT.
The active forecast window currently covers Apr 10 to Apr 15, 2026 for Ontario, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 10 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 12:45 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Ontario
Wednesday looks like the warmest upcoming period in Ontario at 77 degrees F.
Sunday Night is the coolest period ahead with temperatures near 47 degrees F.
The strongest winds are forecast for Friday at about 0 to 15 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 12:45 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
A chance of rain showers. Mostly cloudy, with a low around 57. West wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.
Rain showers likely. Mostly cloudy, with a low around 55.
Rain showers likely. Partly sunny, with a high near 63.
A slight chance of rain showers before 5am. Partly cloudy, with a low around 47.
Mostly sunny, with a high near 66.
Mostly clear, with a low around 47.
Sunny, with a high near 73.
Mostly clear, with a low around 51.
Sunny, with a high near 77.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 10
|
Mostly Sunny then Slight Chance Rain Showers
|
75°F |
0 to 15 mph
SW
|
|
Friday Night
Apr 10
|
Chance Rain Showers
|
57°F |
5 to 15 mph
W
|
|
Saturday
Apr 11
|
Slight Chance Rain Showers
|
68°F |
0 to 15 mph
SW
|
|
Saturday Night
Apr 11
|
Rain Showers Likely
|
55°F |
5 to 15 mph
SW
|
|
Sunday
Apr 12
|
Rain Showers Likely
|
63°F |
5 to 15 mph
SW
|
|
Sunday Night
Apr 12
|
Slight Chance Rain Showers
|
47°F |
0 to 10 mph
SW
|
|
Monday
Apr 13
|
Mostly Sunny
|
66°F |
0 to 10 mph
SW
|
|
Monday Night
Apr 13
|
Mostly Clear
|
47°F |
0 to 10 mph
S
|
|
Tuesday
Apr 14
|
Sunny
|
73°F |
0 to 10 mph
SE
|
|
Tuesday Night
Apr 14
|
Mostly Clear
|
51°F |
0 to 10 mph
W
|
|
Wednesday
Apr 15
|
Sunny
|
77°F |
0 to 10 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ontario.
