Weather Tomorrow for ZIP 91103
Pasadena, CA · View full Pasadena forecast
Heat AdvisoryUntil Aug 21, 3:00 AM
Heat Advisory issued August 17 at 6:13AM PDT until August 20 at 8:00PM PDT by NWS Los Angeles/Oxnard 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.
Tuesday, August 18, 2026
Precip chance
1%
Wind
0-5 mph
Humidity
52%
Feels like
94–67°F
Data source: National Weather Service (NOAA) · Updated just now
Tomorrow by Hour
| Time | Temp | Condition | Rain % | Wind | ||
|---|---|---|---|---|---|---|
| 7 AM☽ | 70°F | Partly Cloudy | 1% | 0 mph | ||
| 8 AM☽ | 69°F | Partly Cloudy | 1% | 0 mph | ||
| 9 AM☽ | 67°F | Partly Cloudy | 1% | 0 mph | ||
| 10 AM☽ | 65°F | Partly Cloudy | 1% | 0 mph | ||
| 11 AM☽ | 66°F | Partly Cloudy | 1% | 0 mph | ||
| 12 PM☽ | 66°F | Mostly Cloudy | 0% | 0 mph | ||
| 1 PM | 66°F | Partly Sunny | 0% | 0 mph | ||
| 2 PM | 66°F | Partly Sunny | 0% | 0 mph | ||
| 3 PM | 71°F | Partly Sunny | 0% | 0 mph | ||
| 4 PM | 74°F | Partly Sunny | 0% | 0 mph | ||
| 5 PM | 78°F | Partly Sunny | 0% | 0 mph | ||
| 6 PM | 83°F | Sunny | 0% | 5 mph SSW | ||
| 7 PM | 87°F | Sunny | 0% | 5 mph SSW | ||
| 8 PM | 92°F | Sunny | 0% | 5 mph SSW | ||
| 9 PM | 95°F | Sunny | 0% | 5 mph SW | ||
| 10 PM | 96°F | Sunny | 0% | 5 mph SW | ||
| 11 PM | 93°F | Sunny | 0% | 5 mph SW | ||
| 12 AM | 92°F | Mostly Sunny | 0% | 5 mph SSW | ||
| 1 AM☽ | 88°F | Partly Cloudy | 0% | 5 mph SSW | ||
| 2 AM☽ | 83°F | Partly Cloudy | 0% | 5 mph SSW | ||
| 3 AM☽ | 79°F | Partly Cloudy | 0% | 5 mph S | ||
| 4 AM☽ | 78°F | Partly Cloudy | 0% | 5 mph S | ||
| 5 AM☽ | 75°F | Partly Cloudy | 0% | 5 mph S | ||
| 6 AM☽ | 73°F | Partly Cloudy | 0% | 5 mph SE | ||
Precipitation Timeline
What to Wear Tomorrow
Extreme heat — stay cool and protected
Clothing
- • Lightest possible clothing
- • Wide-brim hat
- • UV-protective shirt if outdoors
Footwear
Breathable sandals
Accessories
- • Sunglasses
- • Sunscreen
Conditions
High: 96°F
Low: 65°F
Wind: 0-5 mph
Rain: 1%
Big temperature swing (65°F to 96°F) — dress in removable layers.
Best Time to Be Outside Tomorrow
Excellent conditions for outdoor activities (dry, comfortable temp, light wind, daylight)