Climate averages 1991–2020
Khomeynī Shahr weather
in September.
A hot, very dry month: the 4th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Khomeynī Shahr: daytime highs average 31.5°C and nights cool to about 15.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Rain is very rare: less than 1 mm falls in a typical September (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 24 min on an average September day.
The nearest other city in this atlas is Isfahan (13 km away). In September its highs average 31.3°C, about as warm as Khomeynī Shahr, with almost no rain (under 1 mm).
Among the 128 cities listed in Iran, Khomeynī Shahr ranks joint 43rd of 128 for the warmest September highs and joint 28th of 128 for the driest September (rainfall, lowest first). The mean September high of those 128 cities is 31.0°C; Khomeynī Shahr is 0.4°C warmer than that mean.
From September to October, average highs fall by 6.9°C to 24.6°C, and monthly rainfall rises from under 1 mm to 4.9 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Khomeynī Shahr climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.5°C-4.4°C | -4.4°C | 17 | 3.5 | 10.310 h |
| February | 12.3°C-2.3°C | -2.3°C | 14 | 3.2 | 11.011 h |
| March | 17.4°C1.7°C | 1.7°C | 18 | 4.2 | 12.012 h |
| April | 23.3°C7.6°C | 7.6°C | 14 | 4.3 | 13.013 h |
| May | 29.0°C12.8°C | 12.8°C | 11 | 3.1 | 13.814 h |
| June | 34.6°C18.3°C | 18.3°C | 1.4 | 0.3 | 14.314 h |
| July | 37.0°C21.8°C | 21.8°C | 0.4 | 0.1 | 14.114 h |
| August | 35.6°C20.4°C | 20.4°C | 0.1 | 0.0 | 13.413 h |
| September, selected | 31.5°C15.3°C | 15.3°C | 0.5 | 0.1 | 12.412 h |
| October | 24.6°C9.2°C | 9.2°C | 4.9 | 1.4 | 11.411 h |
| November | 15.9°C2.6°C | 2.6°C | 17 | 3.2 | 10.511 h |
| December | 10.5°C-2.1°C | -2.1°C | 14 | 3.3 | 10.010 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Isfahan in SeptemberIran · 13 kmHigh 31.3°C · Low 15.5°C · 0.2 mm rain
- Najafābād in SeptemberIran · 17 kmHigh 31.3°C · Low 15.2°C · 0.8 mm rain
- Shāhīn Shahr in SeptemberIran · 19 kmHigh 30.5°C · Low 14.8°C · 0.5 mm rain
- Fūlād Shahr in SeptemberIran · 26 kmHigh 31.0°C · Low 15.0°C · 0.3 mm rain
- Bahārestān in SeptemberIran · 31 kmHigh 31.6°C · Low 15.6°C · 0.1 mm rain
- Shahr-e Kord in SeptemberIran · 75 kmHigh 27.2°C · Low 12.5°C · 0.6 mm rain
- Shahreẕā in SeptemberIran · 81 kmHigh 29.4°C · Low 14.8°C · 0.1 mm rain
- Kashan in SeptemberIran · 145 kmHigh 32.3°C · Low 20.1°C · 0.4 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Khomeynī Shahr) is explained once on the Khomeynī Shahr year overview and on the Sources, method and limits page.
Shāhīn Shahr lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.