Click on a day for an hourly weather forecast
The temperatures in Ascona in August are comfortable with low of 13°C and and high up to 22°C.
You can expect rain for roughly half of the month of August in Ascona. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Ascona in August 2026.
If you’re planning to visit Ascona in the near future, we highly recommend that you review the 14 day weather forecast for Ascona before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -2° | 4 | 16 | 11 | 50 mm | Awful | Ascona in January |
| February | 4° / -2° | 5 | 12 | 12 | 56 mm | Awful | Ascona in February |
| March | 8° / 1° | 5 | 17 | 10 | 83 mm | Bad | Ascona in March |
| April | 12° / 4° | 7 | 19 | 5 | 156 mm | Awful | Ascona in April |
| May | 16° / 7° | 10 | 21 | 0 | 178 mm | Ok | Ascona in May |
| June | 20° / 11° | 10 | 20 | 0 | 169 mm | Ok | Ascona in June |
| July | 22° / 13° | 10 | 21 | 0 | 157 mm | Ok | Ascona in July |
| August | 22° / 13° | 8 | 23 | 0 | 152 mm | Ok | Ascona in August |
| September | 18° / 10° | 4 | 26 | 0 | 88 mm | Good | Ascona in September |
| October | 13° / 6° | 4 | 26 | 2 | 157 mm | Bad | Ascona in October |
| November | 8° / 3° | 7 | 16 | 7 | 212 mm | Awful | Ascona in November |
| December | 4° / -1° | 3 | 16 | 12 | 77 mm | Awful | Ascona in December |