In September, Acilia-Castel Fusano-Ostia Antica typically sees daytime highs of 26.5°C and overnight lows around 16.0°C. Compared to the annual average high of 20.6°C, September runs +5.9°C.
September in Acilia-Castel Fusano-Ostia Antica averages a daytime high of 26.5°C and an overnight low of 16.0°C.
September runs +5.9°C compared to Acilia-Castel Fusano-Ostia Antica's annual average high of 20.6°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 26.5°C and cooler evenings around 16.0°C.