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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Perspective Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Key West sits at the southern tip of Florida, surrounded by the Atlantic Ocean and Gulf of Mexico, giving it a tropical savanna climate. As the live forecast above shows, temperatures here stay warm year-round, with mild winters and hot, humid summers.
What is the weather like in Key West year round?
Key West weather year round is consistently warm, with average highs ranging from 24°C in January to 32°C in August. The island sees two main seasons: a dry season from November through April, and a wet season from May through October, when afternoon thunderstorms and the risk of tropical systems increase. Humidity remains high throughout the year, especially in summer.
How does the weather change by month?
Key West weather by month shows January as the coolest month, with lows around 18°C, while August is the hottest and wettest. The dry winter months bring plenty of sunshine and lower humidity, making them popular with visitors. For those checking key west weather december, expect pleasant highs near 25°C and low rainfall. If you are looking at weather in key west 10 days or key west weather 15 day forecast, note that longer-range outlooks are less reliable for tropical storms.
What is the best time to visit Key West?
March through May offers the best balance: warm temperatures, lower humidity, and reduced hurricane risk. The dry season from November to April also provides comfortable conditions for outdoor activities.
Does Key West ever get cold?
Cold spells are rare. Even in winter, daytime highs stay above 20°C. Occasional cold fronts can push overnight lows into the low teens Celsius, but frost is virtually unknown.
How accurate is a key west weather 30 day forecast?
Long-range forecasts beyond 10 days have low accuracy for daily specifics. They can indicate general trends (e.g., warmer or wetter than average) but should not be used for trip planning.
Sources
For a broader look at conditions across Canada, visit our Canada weather hub. Compare with Vancouver Weather or Toronto Weather to see how different climates stack up.