Miami, Florida weather in September

Averages from 2021–2025 (150 days of record).

Average high: 87°F
Average low: 76°F
Rainy days: ~24 per month
Total precipitation: 9.2 in
Warmest recorded: 92°F
Coldest recorded: 67°F

Expect September days in Miami, Florida to top out around 87°F and cool to about 76°F overnight, with roughly 24 days of measurable rain across the month. In recent years September has ranged from 67°F to 92°F.

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Current Miami, Florida forecast → · Historical data by Open-Meteo (ERA5).