Weather Tomorrow in San Mateo, CA
Heat AdvisoryUntil Sep 11, 5:00 AM
Heat Advisory issued September 9 at 3:14AM PDT until September 10 at 10:00PM PDT by NWS San Francisco CA
Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Friday, September 11, 2026
Precip chance
2%
Wind
2-12 mph
Humidity
74%
Feels like
76–61°F
Data source: National Weather Service (NOAA) · Updated just now
Tomorrow by Hour
| Time | Temp | Condition | Rain % | Wind | ||
|---|---|---|---|---|---|---|
| 7 AM☽ | 64°F | Mostly Clear | 1% | 5 mph W | ||
| 8 AM☽ | 63°F | Mostly Clear | 1% | 5 mph WSW | ||
| 9 AM☽ | 62°F | Mostly Clear | 1% | 3 mph WSW | ||
| 10 AM☽ | 61°F | Mostly Clear | 1% | 3 mph WSW | ||
| 11 AM☽ | 60°F | Partly Cloudy | 1% | 3 mph WSW | ||
| 12 PM☽ | 60°F | Partly Cloudy | 1% | 2 mph WSW | ||
| 1 PM | 59°F | Mostly Sunny | 1% | 3 mph WSW | ||
| 2 PM | 59°F | Mostly Sunny | 2% | 3 mph WSW | ||
| 3 PM | 61°F | Mostly Sunny | 2% | 5 mph WSW | ||
| 4 PM | 64°F | Mostly Sunny | 2% | 5 mph WSW | ||
| 5 PM | 69°F | Sunny | 1% | 6 mph WSW | ||
| 6 PM | 71°F | Sunny | 1% | 7 mph WSW | ||
| 7 PM | 74°F | Sunny | 1% | 8 mph WSW | ||
| 8 PM | 76°F | Sunny | 1% | 9 mph W | ||
| 9 PM | 77°F | Sunny | 1% | 9 mph W | ||
| 10 PM | 78°F | Sunny | 1% | 10 mph W | ||
| 11 PM | 78°F | Sunny | 1% | 10 mph W | ||
| 12 AM | 76°F | Sunny | 1% | 12 mph W | ||
| 1 AM☽ | 74°F | Mostly Clear | 1% | 10 mph W | ||
| 2 AM☽ | 69°F | Clear | 1% | 8 mph W | ||
| 3 AM☽ | 66°F | Clear | 1% | 7 mph W | ||
| 4 AM☽ | 64°F | Mostly Clear | 2% | 7 mph WSW | ||
| 5 AM☽ | 63°F | Mostly Clear | 2% | 7 mph WSW | ||
| 6 AM☽ | 62°F | Mostly Clear | 0% | 7 mph WSW | ||
Precipitation Timeline
What to Wear Tomorrow
Warm and comfortable — dress light
Clothing
- • T-shirt or light blouse
- • Shorts or light pants
Footwear
Comfortable shoes or sandals
Accessories
- • Sunglasses
Conditions
High: 78°F
Low: 59°F
Wind: 2-12 mph
Rain: 2%
Enjoy your day!
Best Time to Be Outside Tomorrow
Excellent conditions for outdoor activities (dry, comfortable temp, light wind, daylight)
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