What September feels like in Tehran
In Tehran, September brings early autumn. Expect proper heat in the afternoon — slow down between noon and four. Once the sun goes down the air changes: nights stay warm. Dry air means sweat evaporates quickly — it feels less sticky, but you lose water fast.
Rain in Tehran in September
September is a dry month in Tehran; rain falls about one day in 30. When it rains, it is usually light: about 2.9 mm (0.1 in) per rainy day, more drizzle than downpour. That is lighter than the city's yearly norm of about 5.4 mm per rainy day. It is among the three driest months of the year.
Daylight and sunshine in September
Mid-month, Tehran gets 12 h 27 min of daylight, from sunrise near 5:46 am to sunset near 6:14 pm. Compared with mid-August, the day has lost 1 h 6 min. About 91% of daylight hours are sunny; in short, skies are mostly clear.
How September compares to the rest of the year
Ranked by average high, September comes out as the 4th warmest month in Tehran. Compared with August, afternoons are 4.4°C (7.9°F) cooler, with 1 mm less rain. October is cooler again. The next month's average high: 23.9°C (75°F).
Who September suits
- Sightseeing: a good fit — comfortable enough to explore on foot all day.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Hiking: less ideal — too hot for long hikes.
Tips for visiting Tehran in September
Versatile Layers
Pack pieces you can take off by noon and put back on at dusk.
Sun Protection
Protect yourself from strong sun: hat, SPF and plenty of water.
Quick questions
How warm is Tehran in September?
It feels hot: typical highs are 31.1°C (88°F), with lows near 19.7°C (67.5°F).
Does it rain a lot in Tehran in September?
Hardly — only about 1 rainy days and 3 mm for the whole month.
What should I wear in Tehran in September?
Pack versatile layers and sun protection. Evenings feel similar to the day, so the same clothes work from morning to night.
Is September or October better for visiting Tehran?
October, narrowly: it ranks #1 of 12 among Tehran's months, against #2 for the other. October is cooler and has more rainy days.