Isfahan weather in September
In September, Isfahan has an average high of 32 °C90 °F and an average low of 16 °C60 °F, with about 1 mm0.0 in of precipitation. It is the 4th warmest month of the year and ranks 10th for precipitation.
How September compares with other months
Compared with August, September is 4.1 °C7.3 °F cooler on average. Compared with October, September is 6.1 °C10.9 °F warmer on average. Daylight lasts about 12.3 hours around the middle of the month. Average relative humidity is 19% and the average cloud amount 20%.
Is September a good time to visit Isfahan?
September is not among the most comfortable months by our comfort score: it is hot (average high 32 °C90 °F). The most comfortable months in Isfahan are April and October.
What to wear in September
For Isfahan in September, pack very light, breathable clothing, a sun hat and plenty of water and an extra layer for the cooler mornings and evenings.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Isfahan | 3290 | 1660 | 10.0 |
| Khomeyni Shahr | 3391 | 1560 | 10.0 |
| Shahin Shahr | 3290 | 1660 | 10.0 |
| Shahreza | 3187 | 1458 | 10.0 |
| Shahr-e Kord | 2984 | 1355 | 10.0 |
| Kashan | 3595 | 2067 | 10.0 |
| Kashan | 3595 | 2067 | 10.0 |
| Izeh | 3799 | 2272 | 10.0 |
| Qom | 3595 | 1966 | 10.0 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Kashan, Kashan, Izeh and Qom; cooler: Shahreza and Shahr-e Kord.
Other months in Isfahan
- January10 °C49 °F / −3 °C26 °F
- February13 °C55 °F / −2 °C29 °F
- March18 °C65 °F / 2 °C36 °F
- April23 °C74 °F / 7 °C45 °F
- May30 °C86 °F / 13 °C56 °F
- June36 °C97 °F / 18 °C65 °F
- July38 °C101 °F / 21 °C70 °F
- August37 °C98 °F / 20 °C67 °F
- September32 °C90 °F / 16 °C60 °F
- October26 °C78 °F / 10 °C50 °F
- November16 °C62 °F / 3 °C37 °F
- December11 °C52 °F / −2 °C29 °F
Frequently asked questions
How warm is Isfahan in September?
In September the average high in Isfahan is 32 °C (90 °F) and the average low is 16 °C (60 °F).
Does it rain a lot in Isfahan in September?
On average about 1 mm (0.0 in) of precipitation falls in September; it ranks 10th of the 12 months.
Is September the warmest month in Isfahan?
No. The warmest month in Isfahan is July, with an average high of 38 °C (101 °F). The coldest month is January, with an average low of -3 °C (26 °F).
How long is the day in Isfahan in September?
In the middle of September the day in Isfahan lasts about 12.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Isfahan in September?
The average relative humidity in September is about 19%. This is a long-term average for the whole day.
How cloudy is Isfahan in September?
On average about 20% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 1,696 m, while Isfahan lies at about 1,578 m. Temperatures on this page were therefore adjusted by +0.8 °C1.4 °F using the standard lapse rate of 6.5 °C per 1,000 m.