Tehran weather in September
September in Tehran: hot, dry — an excellent time to visit.
#4 of 12 months in Tehran · #149 of 604 destinations to visit in September · comfort 87/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Tehran climate normals — September
| Daytime high | 31°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 19°C / 67°F | |
| Feels like (high) | 29°C / 84°F | |
| Rainfall | 2 mm / 0.1 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 24% | 🌵 dry |
| Dew point | 2°C / 36°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 12.4 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 70 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Tehran in September — FAQ
- Is September a good time to visit Tehran?
- September in Tehran: hot, dry — an excellent time to visit. It ranks #4 of 12 months for Tehran on SeasonMap's comfort score (87/100).
- What is the weather like in Tehran in September?
- In September, Tehran averages a daily high of 30.8°C and a low of 19.4°C, with about 2.3 mm of rain over roughly 0.4 rainy days.
- What is the air quality in Tehran in September?
- Tehran has a mean US Air Quality Index of about 70 in September.