Month-by-month travel weather
Bilbao September weather
Bilbao, Spain · September
Layer + waterproof option is the most efficient combo
September often feels excellent for city walking—still warm enough, with cooler evenings returning.
As autumn approaches, rain becomes more frequent. Keeping a waterproof option helps plans run smoother.
September averages at a glance
Average low
around 14–16°C
Average high
around 21–24°C
Average rainfall
around 70–120 mm
Rainy days
about 8–12 days
What to wear in September in Bilbao
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Mix of T-shirts/long sleeves + thin outer layer.
- • Waterproof jacket option helps.
- • Evening layer helps with breeze.
Travel tips for visiting Bilbao in September
- • Keep routes flexible on rain-risk days.
- • Clear days are great for longer outdoor stretches.
September weather in Bilbao — FAQ
Q. Is September still summer?
A. It often feels summer-like by day, with more fall-like evenings.
Q. Does rain increase from September?
A. It can—autumn tends to get wetter.
Explore Bilbao
These pages are connected so you can compare conditions and decide for yourself.