What is the weather like in Bilbao vs Porto in September?

In September, Bilbao averages 26°C high / 15°C low with about 93 mm of rain; Porto averages 24°C high / 14°C low with about 57 mm.

Bilbao vs Porto in September

Porto is the better pick in September — 91 vs 86 on SeasonMap's comfort score. Porto is warm, a little rain, muggy air, while Bilbao is warm, rainy, clean air.

Bilbao vs Porto — September climate, side by side

	🇪🇸 Bilbao	🇵🇹 Porto
Comfort score	86/100 (A)	91/100 (S)
Feels-like high	26°C	24°C
Avg high / low	26° / 15°	24° / 14°
Rainfall	93 mm	57 mm
Rainy days	10	7
Humidity	79%	75%
Air quality (AQI)	39	51

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Bilbao 🇪🇸 Spainwarm, rainy, clean air · best June86
Porto 🇵🇹 Portugalwarm, a little rain, muggy air · best August91

Bilbao vs Porto in September — FAQ

Is September better in Bilbao or Porto?: Porto is the better pick in September — 91 vs 86 on SeasonMap's comfort score. Porto is warm, a little rain, muggy air, while Bilbao is warm, rainy, clean air.
What is the weather like in Bilbao vs Porto in September?: In September, Bilbao averages 26°C high / 15°C low with about 93 mm of rain; Porto averages 24°C high / 14°C low with about 57 mm.