Calw in September
6.8out of 10
Possible, with caveats
Mild: highs around 18°C. Frequent rain: about 13 rainy days.
18°CAvg high
9°CAvg low
13Rainy days (85 mm)
12:20 hDaylight
07:09Sunrise · 19:29 Sunset
Why this score
- Mild: highs around 18°C
- Frequent rain: about 13 rainy days
- Rain varies a lot between years (±4.0 days)
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±4.0 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 3°C | -2°C | 83 mm | 13 | – | – | 4.0 |
| February | 4°C | -2°C | 74 mm | 11 | – | – | 4.4 |
| March | 9°C | 1°C | 88 mm | 14 | – | – | 5.0 |
| April | 14°C | 4°C | 73 mm | 13 | – | – | 6.1 |
| May | 18°C | 8°C | 110 mm | 16 | – | – | 6.1 |
| June | 21°C | 12°C | 107 mm | 15 | – | – | 6.8 |
| July | 23°C | 13°C | 118 mm | 15 | – | – | 6.9 |
| August | 23°C | 13°C | 106 mm | 14 | – | – | 7.0 |
| September | 18°C | 9°C | 85 mm | 13 | – | – | 6.8 |
| October | 13°C | 6°C | 86 mm | 13 | – | – | 5.9 |
| November | 7°C | 2°C | 80 mm | 13 | – | – | 5.0 |
| December | 4°C | -1°C | 94 mm | 15 | – | – | 3.9 |
Frequently asked questions
How hot is Calw in September?
Daytime highs average 18°C and nights about 9°C.
When is the best time to visit Calw?
The best months are August, July, June, September.