Temperature
Hot by day, warm at night.
89°Ftypical Aug high
Typical range
Key West
United States · North America
Key West is most comfortable in the drier months around January to March. Typical daytime highs run about 79-89°F year-round. The climate is hot and humid. Rainy season runs roughly May to October.
Best time to go
12 mo · Typical year
Temperature range
64°F to 89°F
Rain
10 days/mo
Sunshine
10.9 h/day
Humidity feel
Humid year-round
When to visit
Month-by-month fit
Precipitation
One of the wettest months.
52%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
11.9 hAug sunshine
Heat & humidity by month
Hot afternoons occur, with humid air through much of the month.
73%Aug share of very humid air hours
Easy airWarm airHumid airVery humid air
Hourly comfort pattern
In August, afternoons feel about 89° and nights feel near 87°.
ComfortableWarmHotNight shading
Sea temperature
87°Aug sea temp
More detailIncludes sky, daypart comfort, and wind
Cloud cover
Mostly cloudy skies.
39%Aug clear sky
ClearCloud cover
Typical August day
August stays around 83°F through the day and night, with little temperature relief.
Avg temp Typical range
Morning83°F
Feels 88°F
Rain29%
Cloud62%
Humid airVery high
Sun intensityLow
Midday83°F
Feels 88°F
Rain28%
Cloud58%
Humid airVery high
Sun intensityStrong
Late afternoon83°F
Feels 89°F
Rain19%
Cloud55%
Humid airVery high
Sun intensityStrong
Early evening84°F
Feels 89°F
Rain17%
Cloud59%
Humid airVery high
Sun intensityLow
Best windowWind pattern
August's typical breeze keeps the air from feeling as stagnant.
10 mphAug Breezy
Typical wind speed (mph)
Similar
Similar things to doDenpasar / BaliIndonesiaSimilar things to doPunta de MitaMexicoSimilar things to doNassauBahamasSimilar things to doPalm BeachUnited States
Want a side-by-side climate view? Compare Key West with Denpasar / Bali.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 4, 2026
Data & methodology