Places › Key West, FL › August

Key West in August

A risky month — score 49 of 100

Typical August days in Key West reach about 91°F with nights near 80°F; rain is frequent — about 15 days see some rain, usually in showers. August is also the statistical peak of Atlantic hurricane season (the season runs June 1–November 30) — the averages hide that risk, so flexible plans matter.

Season note: August falls in Atlantic hurricane season (June 1–November 30), its statistical peak. That is climatology, not a forecast — but it is the one risk the averages cannot show.

What to pack for Key West in August

• A waterproof shell — rain falls on about 15 days in a typical August.
• Breathable clothes, a hat, and sunscreen — typical afternoons reach about 91°F.
• Pace the midday hours — about 20 days in a typical August reach 90°F.
• Swimsuit, sandals, and reef-safe sunscreen.

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August vs. the alternatives

The whole year in Key West

Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.