Jacksonville, Florida weather in August

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

Average high: 88°F
Average low: 76°F
Rainy days: ~23 per month
Total precipitation: 7.7 in
Warmest recorded: 98°F
Coldest recorded: 69°F

Expect August days in Jacksonville, Florida to top out around 88°F and cool to about 76°F overnight, with roughly 23 days of measurable rain across the month. In recent years August has ranged from 69°F to 98°F.

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