The temperatures in Alkmaar in September are usually low and can range between 14°C and 18°C.
You can expect about 3 to 8 days of rain in Alkmaar 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 Alkmaar in September 2025.
If you’re planning to visit Alkmaar in the near future, we highly recommend that you review the 14 day weather forecast for Alkmaar before you arrive.
Temperatures
18° / 14°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
109
mm
Sun Hours
9.2
Hrs