Tucson weather in September
September in Tucson: sweltering, dry, with clean air — a great time to visit.
#9 of 12 months in Tucson · #429 of 604 destinations to visit in September · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Tucson climate normals — September
| Daytime high | 36°C / 96°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Feels like (high) | 35°C / 95°F | |
| Rainfall | 18 mm / 0.7 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 35% | 🌵 dry |
| Dew point | 10°C / 50°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 12.4 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Tucson in September — FAQ
- Is September a good time to visit Tucson?
- September in Tucson: sweltering, dry, with clean air — a great time to visit. It ranks #9 of 12 months for Tucson on SeasonMap's comfort score (70/100).
- What is the weather like in Tucson in September?
- In September, Tucson averages a daily high of 35.5°C and a low of 22.5°C, with about 17.5 mm of rain over roughly 4.2 rainy days.
- What is the air quality in Tucson in September?
- Tucson has a mean US Air Quality Index of about 35 in September.