Click on a day for an hourly weather forecast
The temperatures in Karaj in September are comfortable with low of 16°C and and high up to 27°C.
As it is almost never rain during September in Karaj the weather is perfect for hanging out outside and exploring all that Karaj has to offer.
Our weather forecast can give you a great sense of what weather to expect in Karaj in September 2025.
If you’re planning to visit Karaj in the near future, we highly recommend that you review the 14 day weather forecast for Karaj before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -4° | 4 | 21 | 5 | 52 mm | Awful | Karaj in January |
| February | 5° / -3° | 4 | 19 | 5 | 58 mm | Awful | Karaj in February |
| March | 11° / 2° | 5 | 25 | 1 | 64 mm | Ok | Karaj in March |
| April | 18° / 9° | 5 | 25 | 0 | 66 mm | Good | Karaj in April |
| May | 24° / 15° | 3 | 28 | 0 | 55 mm | Perfect | Karaj in May |
| June | 31° / 20° | 0 | 30 | 0 | 18 mm | Good | Karaj in June |
| July | 34° / 22° | 1 | 30 | 0 | 15 mm | Ok | Karaj in July |
| August | 32° / 20° | 0 | 31 | 0 | 9 mm | Good | Karaj in August |
| September | 27° / 16° | 0 | 30 | 0 | 7 mm | Perfect | Karaj in September |
| October | 19° / 10° | 2 | 29 | 0 | 35 mm | Good | Karaj in October |
| November | 9° / 2° | 3 | 26 | 1 | 58 mm | Ok | Karaj in November |
| December | 6° / -2° | 4 | 25 | 2 | 43 mm | Awful | Karaj in December |