Click on a day for an hourly weather forecast
The weather in Arunachal Pradesh in September is hot. The average temperatures are between 21°C and 28°C.
There’s going to be many days of rain during the month of September in Arunachal Pradesh.
Arunachal Pradesh should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Arunachal Pradesh in September 2026.
If you’re planning to visit Arunachal Pradesh in the near future, we highly recommend that you review the 14 day weather forecast for Arunachal Pradesh before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 20° / 10° | 2 | 29 | 0 | 41 mm | Good | Arunachal Pradesh in January |
| February | 22° / 12° | 3 | 25 | 0 | 75 mm | Good | Arunachal Pradesh in February |
| March | 26° / 15° | 8 | 23 | 0 | 168 mm | Good | Arunachal Pradesh in March |
| April | 27° / 18° | 14 | 16 | 0 | 363 mm | Good | Arunachal Pradesh in April |
| May | 28° / 20° | 20 | 11 | 0 | 560 mm | Good | Arunachal Pradesh in May |
| June | 28° / 22° | 24 | 6 | 0 | 876 mm | Good | Arunachal Pradesh in June |
| July | 28° / 22° | 28 | 3 | 0 | 1094 mm | Awful | Arunachal Pradesh in July |
| August | 28° / 22° | 24 | 7 | 0 | 847 mm | Good | Arunachal Pradesh in August |
| September | 28° / 21° | 20 | 10 | 0 | 604 mm | Good | Arunachal Pradesh in September |
| October | 27° / 18° | 7 | 24 | 0 | 199 mm | Good | Arunachal Pradesh in October |
| November | 24° / 14° | 2 | 28 | 0 | 48 mm | Perfect | Arunachal Pradesh in November |
| December | 21° / 11° | 1 | 30 | 0 | 43 mm | Good | Arunachal Pradesh in December |