Weather in Key West in April

Prime time. If you get to pick your dates, April is the one. Highs average 25.5 °C, lows 24.4 °C, and rain falls on 7 days — nothing in the month is working against you.

April ranks 4 of 12 in Key West: past the worst of the year but short of January, which is the month to book if the dates are open.

Rain on 7 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average April reaches 30 °C; the day barely swings — 1.1 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest April day reached 28.9 °C and the coldest night fell to 17.2 °C, and the wettest single day dropped 49 mm — roughly 111% of the month's rain in one day.

This is the volatile part. April rainfall has ranged from 5 mm to 156 mm across the twenty years measured — a 151 mm spread around an average of 44 mm. The average is real but almost no individual April looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind sits around 17.8 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity runs at 76%, high enough to notice on the warm days without dominating them.

How April sits in the year

Temperatures hold steady either side: 24 °C in March, 25.5 here, 27.1 in May. Nothing about the timing within the month matters much. Rain is the thing that moves: May brings 7 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in April

12.7 hours of daylight, gaining 0.7 hours across the month. That is between Key West's extremes of 13.6 and 10.6 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 26.1 °C in April — warm enough to stay in as long as you like. The sea peaks at 29.9 °C in August and bottoms out at 24.9 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

April in Key West versus nearby

If Key West is one option among several, the nearby comparison is worth making. Miami is close enough to be a coin toss — within a degree on temperature, 3 days more rain. Cape Coral is the weaker option in April — 2.6 °C warmer, 2 days more rain.

So: April is effectively as good as it gets here — 4 points behind January, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Key West

See all twelve months in Key West, or where else to go in April.