Big Bend National Park weather in August
August in Big Bend National Park: hot, dry, with clean air — a good time to visit.
#10 of 12 months in Big Bend National Park · #449 of 604 destinations to visit in August · comfort 66/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Big Bend National Park climate normals — August
| Daytime high | 33°C / 91°F | 🥵 hot |
|---|---|---|
| Nighttime low | 22°C / 71°F | |
| Feels like (high) | 33°C / 91°F | |
| Rainfall | 29 mm / 1.1 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 43% | 🍃 comfortable |
| Dew point | 11°C / 51°F | |
| Sunshine | 11.8 h/day | |
| Daylight | 13.2 h | |
| Wind | 15 km/h / 10 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Big Bend National Park in August — FAQ
- Is August a good time to visit Big Bend National Park?
- August in Big Bend National Park: hot, dry, with clean air — a good time to visit. It ranks #10 of 12 months for Big Bend National Park on SeasonMap's comfort score (66/100).
- What is the weather like in Big Bend National Park in August?
- In August, Big Bend National Park averages a daily high of 32.8°C and a low of 21.6°C, with about 29.1 mm of rain over roughly 4.4 rainy days.
- What is the air quality in Big Bend National Park in August?
- Big Bend National Park has a mean US Air Quality Index of about 42 in August.