Click on a day for an hourly weather forecast
The temperatures in Isny in May are quite cold with temperatures between 6°C and 16°C, warm clothes are a must.
There’s going to be many days of rain during the month of May in Isny.
Isny 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!
Please note that Isny can expect a few days of snow in May.
Our weather forecast can give you a great sense of what weather to expect in Isny in May 2026.
If you’re planning to visit Isny in the near future, we highly recommend that you review the 14 day weather forecast for Isny before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -5° | 8 | 6 | 17 | 203 mm | Awful | Isny in January |
| February | 2° / -5° | 7 | 6 | 17 | 145 mm | Awful | Isny in February |
| March | 7° / -2° | 8 | 11 | 12 | 153 mm | Awful | Isny in March |
| April | 12° / 2° | 9 | 15 | 6 | 134 mm | Awful | Isny in April |
| May | 16° / 6° | 16 | 14 | 1 | 295 mm | Ok | Isny in May |
| June | 20° / 10° | 14 | 16 | 0 | 286 mm | Ok | Isny in June |
| July | 21° / 11° | 12 | 19 | 0 | 244 mm | Ok | Isny in July |
| August | 21° / 11° | 12 | 19 | 0 | 258 mm | Ok | Isny in August |
| September | 18° / 8° | 9 | 21 | 0 | 161 mm | Ok | Isny in September |
| October | 14° / 4° | 7 | 22 | 2 | 149 mm | Bad | Isny in October |
| November | 8° / 0° | 6 | 16 | 8 | 120 mm | Bad | Isny in November |
| December | 3° / -3° | 9 | 8 | 15 | 173 mm | Awful | Isny in December |