The temperatures in Castro Urdiales in September are comfortable with low of 16°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Castro Urdiales 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 Castro Urdiales in September 2026.
If you’re planning to visit Castro Urdiales in the near future, we highly recommend that you review the 14 day weather forecast for Castro Urdiales before you arrive.
Temperatures
22° / 16°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
78
mm
Sun Hours
7.6
Hrs
