Saguaro National Park weather in September
September in Saguaro National Park: hot, dry, with clean air — a great time to visit.
#9 of 12 months in Saguaro National Park · #328 of 604 destinations to visit in September · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Saguaro National Park climate normals — September
| Daytime high | 30°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 29°C / 84°F | |
| Rainfall | 27 mm / 1.1 in | ☀️ dry |
| Rainy days | 5 days | |
| Humidity | 38% | 🌵 dry |
| Dew point | 7°C / 44°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 12.4 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 34 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Saguaro National Park?
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Saguaro National Park in September — FAQ
- Is September a good time to visit Saguaro National Park?
- September in Saguaro National Park: hot, dry, with clean air — a great time to visit. It ranks #9 of 12 months for Saguaro National Park on SeasonMap's comfort score (79/100).
- What is the weather like in Saguaro National Park in September?
- In September, Saguaro National Park averages a daily high of 30.4°C and a low of 18°C, with about 27.3 mm of rain over roughly 5.2 rainy days.
- What is the air quality in Saguaro National Park in September?
- Saguaro National Park has a mean US Air Quality Index of about 34 in September.