January in Key West: strong conditions, 3rd of 12
Good · 7.7/10January averages 23°C (73°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 54 mm, so plan one flexible day in three; you still get about 12 days with 6+ hours of sunshine and 10.6 hours of daylight.
It scores 7.7/10 here, 3rd of 12 months, against 8.6/10 in the destination's best month.
Plan for peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
February in Key West: strong conditions, 2nd of 12
Good · 8.4/10February averages 23°C (73°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 64 mm, so plan one flexible day in three; you still get about 19 days with 6+ hours of sunshine and 11.2 hours of daylight.
It scores 8.4/10 here, 2nd of 12 months, against 8.6/10 in the destination's best month.
Plan for peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
March: the best month of the year in Key West
Best window · 8.6/10With 25°C (77°F) on average, March delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
Budget for roughly 69 mm of rain this month — a flexible day or two helps — with about 28 days with 6+ hours of sunshine and 11.8 hours of daylight to work around it.
On our climate-comfort scale this is the top-ranked month of the year for Key West at 8.6/10 — the reference point every other month on this page is measured against.
Budget for peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
April holds up well in Key West — 4th best month
Good · 7.4/10April averages 26°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Monthly rainfall reaches 126 mm — wet for this destination — but about 30 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.4/10 here, 4th of 12 months, against 8.6/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
May in Key West: strong conditions, 5th of 12
Good · 7.2/10Days in May average 28°C (82°F) and humidity near 76% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
138 mm of rain makes this a wet month here, though with about 31 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.2/10 on the same scale — 5th of 12 months, versus 8.6/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
June in Key West — workable with trade-offs
Trade-offs · 6.3/10June averages 29°C (84°F) and humidity near 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
420 mm makes this the wettest stretch of the year, though about 29 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 6.3/10 here, 9th of 12 months, against 8.6/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Flexible dates? March scores 2.3 points higher here — enough to change the trip.
July in Key West: mixed conditions, plan around the weather
Trade-offs · 6.6/10July averages 30°C (86°F) and humidity near 76%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 199 mm — wet for this destination — but about 31 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 6.6/10 here, 7th of 12 months, against 8.6/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Flexible dates? March scores 2 points higher here — enough to change the trip.
August in Key West — workable with trade-offs
Trade-offs · 6.3/10Days in August average 30°C (86°F) and humidity near 76% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
This is the year's wettest stretch at 455 mm, but with about 28 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 6.3/10 on the same scale — 10th of 12 months, versus 8.6/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, March is materially better in Key West — 2.3 points higher on the same scale.
September in Key West — workable with trade-offs
Trade-offs · 6.2/10Days in September average 30°C (86°F) and humidity near 76% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
This is the year's wettest stretch at 308 mm, but with about 24 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 6.2/10 on the same scale — 11th of 12 months, versus 8.6/10 for the best month here.
Budget for low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, March is materially better in Key West — 2.4 points higher on the same scale.
October in Key West — workable with trade-offs
Trade-offs · 6.5/10October averages 28°C (82°F) and humidity near 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 151 mm this is a genuinely wet month: about 19 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.5/10 here, 8th of 12 months, against 8.6/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Flexible dates? March scores 2.1 points higher here — enough to change the trip.
November in Key West — workable with trade-offs
Trade-offs · 6.8/10November averages 26°C (79°F) and humidity near 80%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 106 mm this is a genuinely wet month: about 14 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.8/10 here, 6th of 12 months, against 8.6/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Flexible dates? March scores 1.8 points higher here — enough to change the trip.
December in Key West — middling scores, decent value
Trade-offs · 5.8/10With 23°C (74°F) on average, December delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
124 mm of rain signals a properly wet month, with only about 9 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 5.8/10 on the same scale — 12th of 12 months, versus 8.6/10 for the best month here.
Budget for low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, March is materially better in Key West — 2.8 points higher on the same scale.
