Click on a day for an hourly weather forecast
The temperatures in Leiden in September are usually low and can range between 13°C and 19°C.
You can expect about 3 to 8 days of rain in Leiden during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Leiden in September 2025.
If you’re planning to visit Leiden in the near future, we highly recommend that you review the 14 day weather forecast for Leiden before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 3° | 7 | 20 | 4 | 56 mm | Awful | Leiden in January |
| February | 7° / 3° | 6 | 19 | 4 | 43 mm | Bad | Leiden in February |
| March | 10° / 4° | 5 | 25 | 1 | 40 mm | Ok | Leiden in March |
| April | 14° / 7° | 3 | 27 | 1 | 29 mm | Good | Leiden in April |
| May | 17° / 10° | 4 | 27 | 0 | 47 mm | Good | Leiden in May |
| June | 20° / 13° | 3 | 27 | 0 | 60 mm | Good | Leiden in June |
| July | 22° / 15° | 4 | 27 | 0 | 65 mm | Good | Leiden in July |
| August | 22° / 16° | 4 | 27 | 0 | 67 mm | Good | Leiden in August |
| September | 19° / 13° | 3 | 27 | 0 | 47 mm | Good | Leiden in September |
| October | 15° / 10° | 4 | 27 | 0 | 53 mm | Good | Leiden in October |
| November | 10° / 7° | 6 | 24 | 1 | 50 mm | Ok | Leiden in November |
| December | 7° / 4° | 7 | 21 | 3 | 58 mm | Awful | Leiden in December |