Climate averages 1991–2020
Khomeyn 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 Khomeyn: daytime highs average 29.6°C and nights cool to about 14.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 1.3 mm of rain on fewer than one day, which makes September a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 25 min on an average September day.
The nearest other city in this atlas is Alīgūdarz (44 km away). In September its highs average 27.1°C, 2.5°C cooler than Khomeyn, with 1.0 mm of rain.
Among the 128 cities listed in Iran, Khomeyn ranks joint 71st of 128 for the warmest September highs and joint 61st of 128 for the driest September (rainfall, lowest first). The mean September high of those 128 cities is 31.0°C; Khomeyn is 1.5°C cooler than that mean.
From September to October, average highs fall by 7.2°C to 22.4°C, and monthly rainfall rises from 1.3 mm to 11 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
Khomeyn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.7°C-5.6°C | -5.6°C | 30 | 6.3 | 10.210 h |
| February | 8.2°C-4.1°C | -4.1°C | 32 | 6.3 | 11.011 h |
| March | 13.1°C-0.2°C | -0.2°C | 43 | 7.4 | 12.012 h |
| April | 19.0°C5.3°C | 5.3°C | 37 | 8.4 | 13.013 h |
| May | 25.2°C10.9°C | 10.9°C | 20 | 5.6 | 13.914 h |
| June | 31.8°C16.4°C | 16.4°C | 3.5 | 1.1 | 14.314 h |
| July | 35.0°C20.4°C | 20.4°C | 1.0 | 0.3 | 14.214 h |
| August | 34.1°C19.6°C | 19.6°C | 0.5 | 0.2 | 13.413 h |
| September, selected | 29.6°C14.7°C | 14.7°C | 1.3 | 0.5 | 12.412 h |
| October | 22.4°C8.8°C | 8.8°C | 11 | 3.3 | 11.411 h |
| November | 13.9°C2.2°C | 2.2°C | 25 | 5.1 | 10.510 h |
| December | 8.7°C-2.7°C | -2.7°C | 28 | 5.8 | 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
- Alīgūdarz in SeptemberIran · 44 kmHigh 27.1°C · Low 12.1°C · 1.0 mm rain
- Arāk in SeptemberIran · 62 kmHigh 28.8°C · Low 14.1°C · 1.3 mm rain
- Dorūd in SeptemberIran · 96 kmHigh 31.1°C · Low 17.9°C · 1.0 mm rain
- Shahrak-e Pardīsān in SeptemberIran · 122 kmHigh 32.4°C · Low 18.9°C · 0.2 mm rain
- Borūjerd in SeptemberIran · 126 kmHigh 30.6°C · Low 17.6°C · 2.2 mm rain
- Kashan in SeptemberIran · 130 kmHigh 32.3°C · Low 20.1°C · 0.4 mm rain
- Qom in SeptemberIran · 133 kmHigh 32.9°C · Low 19.4°C · 0.3 mm rain
- Malāyer in SeptemberIran · 137 kmHigh 28.8°C · Low 14.3°C · 1.0 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 Khomeyn) is explained once on the Khomeyn year overview and on the Sources, method and limits page.