Best time to visit Key West

January is the best month in Key West, scoring 91 out of 100, with August the weakest at 52. The 39-point spread means timing is worth planning around without being decisive. 6 of the twelve months sit within ten points of the best, so there is more than one right answer.

August is the warmest month at 29.9 °C and January the coolest at 22.7 °C — a 7.2 °C spread across the year.

There is a real wet season here. June to September carry the rain — up to 26 wet days in a month — while January, February, March, April, November and December drop as low as 5. That 21-day gap is the biggest single difference between a good month and a bad one in Key West, and it moves further than the temperature does.

The sea never drops below 24.9 °C, so swimming is on the table year round. Daylight runs from 10.6 hours in winter to 13.6 in summer, enough to notice on a sightseeing itinerary.

The three strongest months are January, February, March. The one to think twice about is August. Each month below has its own page with rainfall reliability, extremes, daylight, sea temperature and crowd levels.

Key West month by month