Click on a day for an hourly weather forecast
The weather in Riobamba in September is very cold with temperatures between 3°C and 15°C, warm clothes are a must.
There’s going to be many days of rain during the month of September in Riobamba.
Riobamba 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!
Let it snow! You can expect Riobamba to be covered in white during the month of September. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Riobamba in September 2025.
If you’re planning to visit Riobamba in the near future, we highly recommend that you review the 14 day weather forecast for Riobamba before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 4° | 19 | 4 | 14 | 381 mm | Bad | Riobamba in January |
| February | 15° / 5° | 21 | 2 | 9 | 452 mm | Bad | Riobamba in February |
| March | 15° / 5° | 25 | 2 | 10 | 541 mm | Bad | Riobamba in March |
| April | 14° / 5° | 23 | 2 | 11 | 511 mm | Bad | Riobamba in April |
| May | 14° / 4° | 22 | 2 | 15 | 368 mm | Bad | Riobamba in May |
| June | 14° / 3° | 17 | 3 | 16 | 256 mm | Bad | Riobamba in June |
| July | 13° / 3° | 14 | 6 | 13 | 170 mm | Awful | Riobamba in July |
| August | 14° / 3° | 12 | 5 | 15 | 121 mm | Bad | Riobamba in August |
| September | 15° / 3° | 15 | 5 | 15 | 172 mm | Bad | Riobamba in September |
| October | 16° / 4° | 22 | 2 | 11 | 386 mm | Bad | Riobamba in October |
| November | 16° / 4° | 22 | 3 | 12 | 448 mm | Bad | Riobamba in November |
| December | 15° / 4° | 21 | 4 | 13 | 370 mm | Bad | Riobamba in December |