Bilbao Weather in September
September in Bilbao brings high temperatures, with highs of 22°C (72°F) and nights dropping to 15°C (59°F). Rainfall is on the higher side this month, averaging around 76 mm (3 in), so keep a rain jacket handy.
Rainfall in Bilbao in September
You can expect rain on around 12 days based on historical patterns, with 76 mm (3 in) average for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Bilbao in September
Bilbao in September is worth a visit. The temperature is perfect, with 22°C (72°F) during the day and 15°C (59°F) at night. The summer season is characteristic of September. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 15°C (59°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Bilbao in September
The month brings about 160 hours of sunlight, offering a comfortable mix of sun and overcast.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our Bilbao's climate page.
Bilbao Temperature in September
Min Temperature
15°C (59°F)
Max Temperature
22°C (72°F)
Chance of Rain
41%
Precipitation
76 mm (3 in)
Rainy days
12 days
Humidity
71%
Sunshine
160 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Bilbao typically stay consistent throughout September, with daily highs averaging around 22°C (72°F). Nights are cool, with lows typically ranging from 12°C (54°F) to 15°C (59°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Bilbao in September
Browse day-by-day weather records for Bilbao spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Bilbao historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Bilbao.
- On September 16, 1987, temperatures climbed to 41°C (106°F), marking the warmest September day on record.
- The coldest September day was on September 23, 1994, with a maximum of 14°C (57°F).
- The lowest overnight temperature recorded in September was 1°C (34°F) (September 19, 2001).
Best Places in Spain in September
Find out more about the weather in Spain and which places have the best travel conditions in this month. See all of Spain in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Bilbao in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Bilbao in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our Bilbao's climate page.
Temperature Rainfall Sunshine Humidity
See the full Bilbao climate overview or explore weather in Spain.
