What is the weather like in Porto vs San Sebastián in September?

In September, Porto averages 24°C high / 14°C low with about 57 mm of rain; San Sebastián averages 23°C high / 17°C low with about 133 mm.

Porto vs San Sebastián in September

Porto is the better pick in September — 91 vs 83 on SeasonMap's comfort score. Porto is warm, a little rain, muggy air, while San Sebastián is warm, rainy, clean air.

Porto vs San Sebastián — September climate, side by side

	🇵🇹 Porto	🇪🇸 San Sebastián
Comfort score	91/100 (S)	83/100 (A)
Feels-like high	24°C	24°C
Avg high / low	24° / 14°	23° / 17°
Rainfall	57 mm	133 mm
Rainy days	7	11
Humidity	75%	79%
Air quality (AQI)	51	39

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

Month by month

Porto vs San Sebastián in September — FAQ

Is September better in Porto or San Sebastián?: Porto is the better pick in September — 91 vs 83 on SeasonMap's comfort score. Porto is warm, a little rain, muggy air, while San Sebastián is warm, rainy, clean air.
What is the weather like in Porto vs San Sebastián in September?: In September, Porto averages 24°C high / 14°C low with about 57 mm of rain; San Sebastián averages 23°C high / 17°C low with about 133 mm.