Bilbao weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: June – October
What is the weather like in Bilbao in September?
In September, Bilbao is warm: daytime highs average 21 °C, and nights cool down to about 17 °C. Expect around 5 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 70 mm in total. All in all, September is a good month for a holiday in Bilbao.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 74 | 70 | 64 |
| Day | 22° | 21° | 19° |
| Night | 18° | 17° | 15° |
| Sun | 6 h | 5 h | 4 h |
| Rain days | 11 | 12 | 13 |
More details for September
- Daylight
- 12 h 34 min07:50 – 20:24
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 3 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 59 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Madrid
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %37 %
- Few rainy daysweight 30 %44 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Rain jacket or umbrella
Bilbao in September: quick answers
Is Bilbao hot in September?
Warm rather than hot: in September, daytime highs in Bilbao average 21 °C and nights cool to about 17 °C.
Does it rain much in Bilbao in September?
Rain is frequent, with about 12 rainy days and 70 mm in total.
Bilbao month by month
The whole year in BilbaoAll destinations: SpainWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences