Miami, Florida weather in August

Averages from 2021–2025 (155 days of record).

Average high: 89°F
Average low: 78°F
Rainy days: ~25 per month
Total precipitation: 5.9 in
Warmest recorded: 94°F
Coldest recorded: 74°F

Expect August days in Miami, Florida to top out around 89°F and cool to about 78°F overnight, with roughly 25 days of measurable rain across the month. In recent years August has ranged from 74°F to 94°F.

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