Click on a day for an hourly weather forecast
The temperatures in Chillan in September are quite cold with temperatures between 6°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Chillan during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Chillan in September 2026.
If you’re planning to visit Chillan in the near future, we highly recommend that you review the 14 day weather forecast for Chillan before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 31° / 13° | 1 | 30 | 0 | 17 mm | Good | Chillan in January |
| February | 31° / 13° | 1 | 28 | 0 | 21 mm | Good | Chillan in February |
| March | 28° / 12° | 1 | 30 | 0 | 19 mm | Perfect | Chillan in March |
| April | 23° / 10° | 2 | 28 | 0 | 50 mm | Perfect | Chillan in April |
| May | 18° / 8° | 6 | 25 | 0 | 201 mm | Good | Chillan in May |
| June | 14° / 6° | 9 | 21 | 0 | 359 mm | Ok | Chillan in June |
| July | 13° / 5° | 9 | 22 | 0 | 264 mm | Bad | Chillan in July |
| August | 14° / 5° | 9 | 22 | 0 | 283 mm | Ok | Chillan in August |
| September | 17° / 6° | 5 | 25 | 0 | 124 mm | Good | Chillan in September |
| October | 21° / 7° | 4 | 27 | 0 | 93 mm | Good | Chillan in October |
| November | 25° / 9° | 3 | 27 | 0 | 60 mm | Perfect | Chillan in November |
| December | 29° / 11° | 1 | 30 | 0 | 27 mm | Good | Chillan in December |