Weather Tomorrow in Ontario, CA
Heat AdvisoryUntil Sep 12, 3:00 AM
Heat Advisory issued September 11 at 2:30AM PDT until September 11 at 8:00PM PDT by NWS San Diego CA
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Saturday, September 12, 2026
Precip chance
0%
Wind
0-15 mph
Humidity
67%
Feels like
90–72°F
Data source: National Weather Service (NOAA) · Updated just now
Tomorrow by Hour
| Time | Temp | Condition | Rain % | Wind | ||
|---|---|---|---|---|---|---|
| 7 AM☽ | 76°F | Mostly Clear | 0% | 5 mph W | ||
| 8 AM☽ | 75°F | Mostly Clear | 0% | 5 mph W | ||
| 9 AM☽ | 73°F | Mostly Clear | 0% | 5 mph W | ||
| 10 AM☽ | 73°F | Mostly Clear | 0% | 5 mph W | ||
| 11 AM☽ | 72°F | Mostly Clear | 0% | 5 mph W | ||
| 12 PM☽ | 71°F | Mostly Clear | 0% | 5 mph W | ||
| 1 PM | 70°F | Sunny | 0% | 0 mph | ||
| 2 PM | 70°F | Sunny | 0% | 0 mph | ||
| 3 PM | 72°F | Sunny | 0% | 0 mph | ||
| 4 PM | 75°F | Sunny | 0% | 0 mph | ||
| 5 PM | 78°F | Sunny | 0% | 0 mph | ||
| 6 PM | 84°F | Sunny | 0% | 5 mph SW | ||
| 7 PM | 87°F | Sunny | 0% | 5 mph SW | ||
| 8 PM | 90°F | Sunny | 0% | 10 mph W | ||
| 9 PM | 92°F | Sunny | 0% | 10 mph W | ||
| 10 PM | 92°F | Sunny | 0% | 10 mph W | ||
| 11 PM | 91°F | Sunny | 0% | 15 mph W | ||
| 12 AM | 89°F | Sunny | 0% | 10 mph W | ||
| 1 AM☽ | 86°F | Clear | 0% | 10 mph W | ||
| 2 AM☽ | 82°F | Clear | 0% | 10 mph W | ||
| 3 AM☽ | 79°F | Clear | 0% | 10 mph W | ||
| 4 AM☽ | 77°F | Clear | 0% | 10 mph W | ||
| 5 AM☽ | 75°F | Clear | 0% | 5 mph W | ||
| 6 AM☽ | 73°F | Mostly Clear | 0% | 5 mph W | ||
Precipitation Timeline
What to Wear Tomorrow
Hot — wear breathable, light clothing
Clothing
- • Light t-shirt or tank top
- • Shorts or light skirt
- • Hat for sun protection
Footwear
Sandals or breathable sneakers
Accessories
- • Sunglasses
- • Sunscreen
Conditions
High: 92°F
Low: 70°F
Wind: 0-15 mph
Rain: 0%
Enjoy your day!
Best Time to Be Outside Tomorrow
Excellent conditions for outdoor activities (dry, comfortable temp, light wind, daylight)
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