Click on a day for an hourly weather forecast
The temperatures in Calw in April are quite cold with temperatures between 5°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Calw during the month of April. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Calw can expect a few days of snow in April.
Our weather forecast can give you a great sense of what weather to expect in Calw in April 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 |