Weather Tomorrow for ZIP 78664
Round Rock, TX · View full Round Rock forecast
Extreme Heat WarningUntil Aug 25, 6:00 AM
Extreme Heat Warning issued August 24 at 12:26PM CDT until August 24 at 7:00PM CDT by NWS Austin/San Antonio TX
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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Heat AdvisoryUntil Aug 25, 6:00 AM
Heat Advisory issued August 24 at 12:26PM CDT until August 26 at 7:00PM CDT by NWS Austin/San Antonio TX
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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Tuesday, August 25, 2026
Precip chance
1%
Wind
5-10 mph
Humidity
52%
Feels like
101–80°F
Data source: National Weather Service (NOAA) · Updated 59 min ago
Tomorrow by Hour
| Time | Temp | Condition | Rain % | Wind | ||
|---|---|---|---|---|---|---|
| 5 AM☽ | 87°F | Clear | 0% | 10 mph S | ||
| 6 AM☽ | 85°F | Mostly Clear | 0% | 10 mph SSW | ||
| 7 AM☽ | 84°F | Mostly Clear | 0% | 10 mph SSW | ||
| 8 AM☽ | 82°F | Mostly Clear | 0% | 10 mph SSW | ||
| 9 AM☽ | 80°F | Mostly Clear | 0% | 10 mph SSW | ||
| 10 AM☽ | 80°F | Mostly Clear | 0% | 10 mph SSW | ||
| 11 AM | 79°F | Sunny | 0% | 10 mph SSW | ||
| 12 PM | 78°F | Sunny | 1% | 10 mph SSW | ||
| 1 PM | 79°F | Sunny | 1% | 5 mph SSW | ||
| 2 PM | 81°F | Sunny | 1% | 5 mph SW | ||
| 3 PM | 86°F | Sunny | 1% | 5 mph SW | ||
| 4 PM | 90°F | Sunny | 1% | 5 mph SW | ||
| 5 PM | 95°F | Sunny | 1% | 5 mph SSW | ||
| 6 PM | 98°F | Sunny | 1% | 5 mph S | ||
| 7 PM | 100°F | Sunny | 1% | 5 mph SSE | ||
| 8 PM | 102°F | Sunny | 1% | 5 mph SSE | ||
| 9 PM | 103°F | Sunny | 1% | 5 mph S | ||
| 10 PM | 103°F | Sunny | 1% | 5 mph S | ||
| 11 PM☽ | 103°F | Clear | 1% | 5 mph S | ||
| 12 AM☽ | 101°F | Clear | 0% | 5 mph S | ||
| 1 AM☽ | 99°F | Clear | 0% | 5 mph S | ||
| 2 AM☽ | 94°F | Clear | 0% | 5 mph SSE | ||
| 3 AM☽ | 91°F | Clear | 0% | 5 mph S | ||
| 4 AM☽ | 90°F | Mostly Clear | 0% | 10 mph S | ||
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: 103°F
Low: 78°F
Wind: 5-10 mph
Rain: 1%
Enjoy your day!
Best Time to Be Outside Tomorrow
Excellent conditions for outdoor activities (dry, comfortable temp, light wind, daylight)