Naples vs Siena in September

Siena is the better pick in September — 90 vs 80 on SeasonMap's comfort score. Siena is warm, rainy, clean air, while Naples is hot, rainy.

Naples vs Siena — September climate, side by side

🇮🇹 Naples🇮🇹 Siena
Comfort score80/100 (A)90/100 (S)
Feels-like high29°C25°C
Avg high / low28° / 18°25° / 15°
Rainfall128 mm93 mm
Rainy days99
Humidity73%71%
Air quality (AQI)5641

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

Month by month

Naples vs Siena in September — FAQ

Is September better in Naples or Siena?
Siena is the better pick in September — 90 vs 80 on SeasonMap's comfort score. Siena is warm, rainy, clean air, while Naples is hot, rainy.
What is the weather like in Naples vs Siena in September?
In September, Naples averages 28°C high / 18°C low with about 128 mm of rain; Siena averages 25°C high / 15°C low with about 93 mm.