Click on a day for an hourly weather forecast
The weather in Itanagar 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 Itanagar.
Itanagar 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 Itanagar in September 2026.
If you’re planning to visit Itanagar in the near future, we highly recommend that you review the 14 day weather forecast for Itanagar before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 20° / 10° | 2 | 29 | 0 | 41 mm | Good | Itanagar in January |
| February | 22° / 12° | 3 | 25 | 0 | 75 mm | Good | Itanagar in February |
| March | 26° / 15° | 8 | 23 | 0 | 168 mm | Good | Itanagar in March |
| April | 27° / 18° | 14 | 16 | 0 | 363 mm | Good | Itanagar in April |
| May | 28° / 20° | 20 | 11 | 0 | 560 mm | Good | Itanagar in May |
| June | 28° / 22° | 24 | 6 | 0 | 876 mm | Good | Itanagar in June |
| July | 28° / 22° | 28 | 3 | 0 | 1094 mm | Awful | Itanagar in July |
| August | 28° / 22° | 24 | 7 | 0 | 847 mm | Good | Itanagar in August |
| September | 28° / 21° | 20 | 10 | 0 | 604 mm | Good | Itanagar in September |
| October | 27° / 18° | 7 | 24 | 0 | 199 mm | Good | Itanagar in October |
| November | 24° / 14° | 2 | 28 | 0 | 48 mm | Perfect | Itanagar in November |
| December | 21° / 11° | 1 | 30 | 0 | 43 mm | Good | Itanagar in December |