Click on a day for an hourly weather forecast
The weather in Solothurn in May is very cold with temperatures between 4°C and 18°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Solothurn. 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 Solothurn in May 2026.
If you’re planning to visit Solothurn in the near future, we highly recommend that you review the 14 day weather forecast for Solothurn before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -5° | 7 | 12 | 12 | 85 mm | Awful | Solothurn in January |
| February | 5° / -5° | 7 | 10 | 12 | 64 mm | Awful | Solothurn in February |
| March | 10° / -1° | 6 | 17 | 8 | 67 mm | Bad | Solothurn in March |
| April | 14° / 2° | 6 | 21 | 3 | 73 mm | Ok | Solothurn in April |
| May | 18° / 4° | 10 | 21 | 0 | 135 mm | Ok | Solothurn in May |
| June | 22° / 8° | 9 | 21 | 0 | 124 mm | Ok | Solothurn in June |
| July | 24° / 10° | 7 | 24 | 0 | 116 mm | Good | Solothurn in July |
| August | 24° / 10° | 7 | 24 | 0 | 96 mm | Good | Solothurn in August |
| September | 20° / 7° | 4 | 26 | 0 | 68 mm | Good | Solothurn in September |
| October | 15° / 3° | 5 | 26 | 1 | 76 mm | Good | Solothurn in October |
| November | 10° / 0° | 6 | 18 | 6 | 74 mm | Bad | Solothurn in November |
| December | 5° / -3° | 7 | 15 | 9 | 96 mm | Awful | Solothurn in December |