The month in detail
What to expect in September
Autumn in Tehran is often underrated: 32°C, golden light and declining crowds. An interesting window. Rain is virtually absent (1% of days) — ideal for planning without a backup. A good balance between weather and crowds, even if May (8.9/10) remains theoretically better.
September is the best month of the year in Tehran. Compared to August: −4°C daytime, −0.9h of sun per day.
This month's conditions
What it's like in September
UV index
7 · high
sunscreen and hat advised
Feels like
dry air
-2°
Daylight
12.2h of daylight
Air quality
poor
AQI 63
Compare
Is September the right month?
The best month in Tehran is May (8.9/10), 0.0 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Tehran
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
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🎟️ Activities & tours · Tehran
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a city break.
Country · Iran
🗣️LanguagePersan
💶CurrencyRial iranien (﷼)
🚗DrivingRight-hand
🛡️Safety ⓘAt risk · 4/5
💰Cost of living ⓘVery cheap · 1/5
🌡️ Climate
🌍Climate typeTemperate
📈Climate trend ⓘStable
🔥Hottest monthJuly · 38°C
❄️Coolest monthJanuary · 9°C
🌧️Rainiest month ⓘFebruary · 19%
🏛️ City break
📅Tourist peak seasonJune → August
☔Indoor sights ⓘYear-round
🚇Public transportGood
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Tehran ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
IranTemperate climate with a 8.9 → 3.6 gap between best and worst month. 10 years of ERA5 data to choose by project.
35.69°N · 51.39°E
Questions
Frequently asked questions
What is the best time to visit Tehran?
September is the best month with 32.0°C highs, 21.0°C lows, 10.3h of sunshine and 1.0% rainy days. The months of September & May offer comparable conditions.
How many hours of sunshine does Tehran get in September?
Tehran averages 10.3 sunshine hours per day in September. It is the sunniest month with a climate score of 8.6/10.
What is the rainiest month in Tehran?
July is the most unfavourable month with July has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Tehran in September?
In September, overnight lows reach 21.0°C, while afternoon highs average 32.0°C.
Is Tehran good in winter?
In winter (December-February), Tehran scores 4.1/10 on average — Difficult period — prefer the peak season.. The best month overall remains September with a score of 8.6/10.
When should you avoid Tehran?
July is the most difficult month to visit Tehran, with July has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Do you need sun protection in Tehran in September?
The average UV index reaches 7 in September in Tehran (high), with about 12.2h of daylight. Sunscreen and hat advised.