Tehran Weather in September
September in Tehran brings high temperatures, with highs of 30°C (86°F) and nights dropping to 18°C (64°F). Rainfall is very low this month, averaging just 3.9 mm (0.2 in).
Rainfall in Tehran in September
Climate statistics over the past 30 years suggest around 2 days of rain, with 3.9 mm (0.2 in) average for the month. Any rain that does arrive is likely to be light drizzle rather than a proper shower.
Temperature in Tehran in September
The excellent temperature in Tehran in September makes it a solid month to visit, with 30°C (86°F) during the day and 18°C (64°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 18°C (64°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Tehran in September
Enjoy a sunny month with about 304 hours of sunshine, the clear skies make Tehran even more beautiful.
Wind Speed in Tehran in September
Wind speeds average 2 m/s (4 knots) during September. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.Should you favor a climate that's both dry and comfortably warm, May and October typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iran, check out our Tehran's climate page.
Tehran Temperature in September
Min Temperature
18°C (64°F)
Max Temperature
30°C (86°F)
Chance of Rain
5%
Precipitation
3.9 mm (0.2 in)
Rainy days
2 days
Humidity
25% *
Windspeed
2 m/s (4 knots) *
Sunshine
304 hours *
Percentage Sunshine
*
Daily Historical Temperatures
41-year average (1976-2025)
Based on our historical records, temperatures in Tehran typically drop from around 34°C (93°F) at the start of September to approximately 29°C (84°F) by the end. Nights are warm, with lows typically ranging from 18°C (64°F) to 23°C (73°F).
Average temperatures in September
Daily Historical Precipitation
41-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Tehran in September
Browse day-by-day weather records for Tehran spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Tehran historical weather extremes in September
Based on 24 years of weather observations in Tehran between 2001 and 2025, these are the recorded extremes.
- The warmest day in September was on September 3, 2021, with a maximum of 38°C (100°F).
- The lowest daytime temperature in September was 18°C (64°F), recorded on September 29, 2024.
- The coldest night in September in Tehran was on September 25, 2009, with a minimum of 11°C (52°F).
Best Places in Iran in September
Find out more about the weather in Iran and which places have the best travel conditions in this month. See all of Iran in September →
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What to Wear in Tehran in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Tehran in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iran, check out our Tehran's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Tehran climate overview or explore weather in Iran.
