Click on a day for an hourly weather forecast
The temperatures in Calw in May are quite cold with temperatures between 8°C and 19°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Calw. 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 Calw in May 2026.
If you’re planning to visit Calw in the near future, we highly recommend that you review the 14 day weather forecast for Calw before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -1° | 7 | 12 | 12 | 72 mm | Awful | Calw in January |
| February | 6° / 0° | 7 | 12 | 9 | 62 mm | Awful | Calw in February |
| March | 11° / 2° | 6 | 20 | 5 | 52 mm | Bad | Calw in March |
| April | 16° / 5° | 5 | 23 | 2 | 48 mm | Ok | Calw in April |
| May | 19° / 8° | 8 | 23 | 0 | 109 mm | Ok | Calw in May |
| June | 23° / 12° | 5 | 25 | 0 | 97 mm | Perfect | Calw in June |
| July | 25° / 14° | 5 | 26 | 0 | 100 mm | Perfect | Calw in July |
| August | 25° / 14° | 5 | 26 | 0 | 80 mm | Perfect | Calw in August |
| September | 21° / 11° | 3 | 27 | 0 | 52 mm | Good | Calw in September |
| October | 15° / 7° | 5 | 26 | 0 | 58 mm | Good | Calw in October |
| November | 10° / 4° | 6 | 22 | 3 | 67 mm | Bad | Calw in November |
| December | 6° / 1° | 8 | 15 | 8 | 76 mm | Awful | Calw in December |