September · Spain
Best time to visit Bilbao in September Weather, crowds & prices
Weather in Bilbao in September
Average temperature 19°C, 105 mm of rain, about 25 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.9/10
Ranked #5 of 12 months
- Avg temp
- 19°C
- Rainfall
- 105 mm
- Humidity
- 78%
- Days with 6h+ sun
- 25
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Bilbao scores 7.9/10 for sightseeing and cultural travel - an above-average month (#5 of 12). Expect around 19°C, 105 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Bilbao's Guggenheim curves along the Nervión, with the Casco Viejo and Artxanda funicular a short walk or ride away.
September in Bilbao — reliably good (5th best month)
At 19°C (66°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
105 mm of rain makes this a wet month here, though with about 25 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.9/10 on the same scale — 5th of 12 months, versus 9.6/10 for the best month here.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
Expect mid-season pricing, and crowds are moderate.
If your dates are flexible, July is materially better in Bilbao — 1.7 points higher on the same scale.
Frequently asked
- What is the weather like in Bilbao in September?
- In September, Bilbao averages 19°C, 105 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 7.9/10.
- Is September a good time to visit Bilbao?
- September earns a 7.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Bilbao in September?
- Expect about 105 mm of rain in September. Average humidity is 78% and there are about 25 days with 6+ hours of sunshine.
Curated in Bilbao
Tickets & experiences
Things to do in Bilbao
Bilbao, Spain. Live activities and tours from GetYourGuide, matched to this destination.