Key West weather in April

April in Key West: hot, a little rain, with clean air — one of the best months to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Key West🇺🇸 United States · Florida · Beach90
  1. 84Jan
  2. 89Feb
  3. 91Mar
  4. 90Apr
  5. 85May
  6. 82Jun
  7. 80Jul
  8. 78Aug
  9. 76Sep
  10. 81Oct
  11. 86Nov
  12. 83Dec

#2 of 12 months in Key West · #159 of 1413 destinations to visit in April · comfort 90/100 (tier S)

Days
29°C
Nights
23°C
Wet days
4
Sun
11.6 h
Humidity
76%
Daylight
13 h
Key West, United States
Photo: Arian Fernandez · Pexels

Traveller notes on Key West in April

April in Key West is a single planning question on the forum: which side of Easter are you on. The busiest weeks sit right around it, mostly families on spring vacation rather than a rowdy college crowd, and regulars say it thins out noticeably afterwards - late April is the sweet spot, with warm water and the crowds gone. The weather argument for the month is that the humidity has not come back yet and little falls. Wind is the one caveat they raise: April is reliably breezy, enough to spoil some days on the water, and sargassum turns up or does not depending on which way it is blowing. The record: 28.7C days feeling like 31C, 22.5C nights, 4.4 precipitation days, 11.6 hours of sun, a 27C sea and a 28 kph wind.
AfterEasterKeyWest · April · 1 month ago · Read more on Tripadvisor ↗

Other months in Key West

Regulars are consistent this counts as genuinely pleasant overall, warm and sunny with little rain chance the norm, though several cold fronts each winter bring a handful of windy, noticeably chillier days, temperatures dropping 10-15 degrees below the run of the month. Our row backs that mild, still-dry read, 23.9C over 17.9C nights, with 46.9mm of rain across 5.2 days and a real 30.9 kph wind. Regulars are consistent this is high season here, prices climbing accordingly, jeans and a light sweater the standard packing advice for evenings and any cold-front days rather than a full coat. The sea sits at a swimmable 24.6C despite the water reading cooler than the air on paper. The record: humidity 77 percent, 9 hours of sun and AQI 45.
ColdFrontsBringAFewChillyWindyDays · January · 1 month ago · Read more on Tripadvisor ↗
Regulars call this a transitional month rather than a settled one - awesome, un-oppressive weather in some years, hot and humid in others, with the one consistent change being winter's wind finally easing off, which makes it a favoured month for getting out on the water. Our row leans toward the warmer read, 30.2C reading as 34C at 77.1 percent humidity, over 24.1C nights, with 103.6mm of rain across 6.9 days. Regulars are specific about the calendar that follows: real humidity builds from late May, June brings the heat and the start of hurricane season in earnest, so May is the last easy month before both arrive. The sea stays calm and warm at 28.6C, good for fishing and snorkelling either way. The record: 11.9 hours of sun, a 25.7 kph wind and AQI 44.
WindsDieDownBeforeTheHeatArrives · May · 1 month ago · Read more on Tripadvisor ↗
Key West-forum threads on November weather call it, along with October, one of the genuinely nice stretches of the year - warm days, cool nights, humidity down from summer's peak, closer in feel to spring than to the hurricane-season months just before it. Showers do still happen, but posters say it's rare for one to be more than something passing through rather than a washed-out day, and some stretches go by without a cloud in sight. The end of the month can turn unpredictable - a late-season storm or a couple of chillier days are possible - but the average still comes out ahead of what preceded it. High-season lodging rates don't kick in until mid-December, making early November good value too, alongside a couple of specific events in the first half of the month. The record: 27.3C days feeling like 29C, 21.9C nights, 68mm across 4.9 days, a 27.4C sea, 76 percent humidity, wind averaging over 29 km/h and 9.5 hours of sun.
DuvalStreetNovemberRegular · November · 1 month ago · Read more on Tripadvisor ↗
February in Key West is sunny and mostly dry - our row gives 41.4mm across 3.7 days - with an average high near 76F and a low near 66F, and most visitors getting 70s-to-80s days and cool nights. The word regulars repeat is windy. Our row's 28.6 kph is the strongest wind of the Key West year, and the consequences they list are the water ones: it is not a great month for water activities, and the wind is enough to make the ferry a poor bet. A cold front can also drop a couple of days into low-60s highs and low-50s nights, which is why the packing advice is shorts plus one sweatshirt. This is also peak season. The record: 26C days, 19.9C nights, 10.1 hours of sun and a 25.3C sea.
WindyEnoughToSkipTheFerry · February · 1 month ago · Read more on Tripadvisor ↗

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Key West climate normals — April

Daytime high29°C / 84°F🥵 hot
Nighttime low23°C / 73°F
Feels like (high)31°C / 88°F
Sea temperature27°C / 81°F😎 warm sea
Rainfall42 mm / 1.6 in🌦 some rain
Rainy days4 days
Humidity76%💦 very humid
Dew point21°C / 69°F
Sunshine11.6 h/day
Daylight12.7 h
Wind28 km/h / 18 mph
Air quality (US AQI)50🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Key West in April

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsSpring break peak, Conch Republic Independence Celebration(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Key West's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherKey West's weather doesn't swing hard through the year — comfort stays fairly steady in every month.

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What's on in Key West in April

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Holiday

    Spring break peak

    1 Mar – 15 Apr · usuallySchool holidaysCrowdedBook early

    March is usually the busiest month of the year, with spring-break families on top of the winter crowd; hotels run close to full, rates and airfares peak, and Duval Street is loud late. Book well ahead or come in May. Source ↗

  • Festival

    Conch Republic Independence Celebration

    17–26 AprMajor festivalCrowded

    Ten days of tongue-in-cheek independence parties around 23 April, the anniversary of the 1982 mock secession: a parade down Duval, a harbour boat parade and a mock surrender ceremony with the Coast Guard at the Historic Seaport. Source ↗

  • Festival

    Key West Songwriters Festival

    29 Apr – 3 MayMusic festival

    Nashville writers play their own hits in bars, theatres and on waterfront stages for five days around the turn of April into May; many shows are free, the bigger ones ticketed. Source ↗

What's on around the world in April →

Nearby, and something's on

Within 300 km of Key West — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Key West?

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Key West in April — FAQ

Is April a good time to visit Key West?
April in Key West: hot, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Key West on SeasonMap's comfort score (90/100).
What is the weather like in Key West in April?
In April, Key West averages a daily high of 28.7°C and a low of 22.5°C, with about 41.7 mm of rain over roughly 4.4 rainy days.
What is the air quality in Key West in April?
Key West has a mean US Air Quality Index of about 50 in April.

Within 300 km: Everglades National Park's Wading bird nesting around 1 Dec – 15 Apr, and Miami's Sea turtle nesting on 1 Mar – 31 Oct.