Click on a day for an hourly weather forecast
The temperatures in Locarno in September are usually low and can range between 10°C and 18°C.
You can expect about 3 to 8 days of rain in Locarno 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 Locarno in September 2025.
If you’re planning to visit Locarno in the near future, we highly recommend that you review the 14 day weather forecast for Locarno before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -2° | 4 | 16 | 11 | 50 mm | Awful | Locarno in January |
| February | 4° / -2° | 5 | 12 | 12 | 56 mm | Awful | Locarno in February |
| March | 8° / 1° | 5 | 17 | 10 | 83 mm | Bad | Locarno in March |
| April | 12° / 4° | 7 | 19 | 5 | 156 mm | Awful | Locarno in April |
| May | 16° / 7° | 10 | 21 | 0 | 178 mm | Ok | Locarno in May |
| June | 20° / 11° | 10 | 20 | 0 | 169 mm | Ok | Locarno in June |
| July | 22° / 13° | 10 | 21 | 0 | 157 mm | Ok | Locarno in July |
| August | 22° / 13° | 8 | 23 | 0 | 152 mm | Ok | Locarno in August |
| September | 18° / 10° | 4 | 26 | 0 | 88 mm | Good | Locarno in September |
| October | 13° / 6° | 4 | 26 | 2 | 157 mm | Bad | Locarno in October |
| November | 8° / 3° | 7 | 16 | 7 | 212 mm | Awful | Locarno in November |
| December | 4° / -1° | 3 | 16 | 12 | 77 mm | Awful | Locarno in December |