Click on a day for an hourly weather forecast
The temperatures in Kathmandu in September are comfortable with low of 15°C and and high up to 25°C.
With more than 22 rainy days, Kathmandu is an incredibly wet during September. Be sure to pack your umbrella and bring along your rubber boots to stay dry. It’s going to be raining cats and dogs this month!
Our weather forecast can give you a great sense of what weather to expect in Kathmandu in September 2025.
If you’re planning to visit Kathmandu in the near future, we highly recommend that you review the 14 day weather forecast for Kathmandu before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 17° / 4° | 2 | 29 | 0 | 24 mm | Good | Kathmandu in January |
| February | 20° / 6° | 3 | 25 | 0 | 51 mm | Good | Kathmandu in February |
| March | 25° / 10° | 4 | 27 | 0 | 70 mm | Perfect | Kathmandu in March |
| April | 28° / 13° | 10 | 20 | 0 | 211 mm | Good | Kathmandu in April |
| May | 27° / 15° | 18 | 14 | 0 | 421 mm | Good | Kathmandu in May |
| June | 27° / 16° | 23 | 7 | 0 | 705 mm | Good | Kathmandu in June |
| July | 25° / 17° | 28 | 3 | 0 | 1098 mm | Awful | Kathmandu in July |
| August | 26° / 16° | 28 | 3 | 0 | 996 mm | Awful | Kathmandu in August |
| September | 25° / 15° | 23 | 7 | 0 | 568 mm | Good | Kathmandu in September |
| October | 24° / 12° | 9 | 22 | 0 | 195 mm | Good | Kathmandu in October |
| November | 21° / 8° | 1 | 29 | 0 | 26 mm | Good | Kathmandu in November |
| December | 19° / 5° | 1 | 30 | 0 | 13 mm | Good | Kathmandu in December |