The month in detail
What to expect in May
Spring marks the start of the good season in Key West. Temperatures rise (27°C) and tourists have not yet arrived en masse. Rain risk remains low (20% of days), leaving good room for outdoor activities. This is one of the best times of year to visit Key West.
May is the best month of the year in Key West. Compared to April: 7 pts more rainy days.
This month's conditions
What it's like in May
UV index
9 · very high
protection essential
Feels like
very humid
22°
Sea
29°C
warm, ideal
Daylight
13.2h of daylight
Air quality
good
AQI 31
Compare
Is May the right month?
The best month in Key West is April (9.1/10), 0.0 pt higher than May.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Key West
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Key West
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.
Country · USA
🗣️LanguageEnglish
💶CurrencyUS Dollar ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthJuly · 30°C
❄️Coolest monthJanuary · 23°C
🌧️Rainiest month ⓘSeptember · 38%
🏖️ Beach holiday
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in May
If May doesn't convince you for this destination, compare with others.
Location
Where is Key West ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
USATemperate oceanic climate with a 9.1 → 5.7 gap between best and worst month. 10 years of ERA5 data to choose by project.
24.56°N · 81.78°W
Questions
Frequently asked questions
What is the best time to visit Key West?
April is the best month with 26.0°C highs, 24.0°C lows, 10.8h of sunshine and 13.0% rainy days. The months of April & March offer comparable conditions.
How many hours of sunshine does Key West get in April?
Key West averages 10.8 sunshine hours per day in April. It is the sunniest month with a climate score of 8.8/10.
What is the rainiest month in Key West?
September is the most unfavourable month with September has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Key West in April?
In April, overnight lows reach 24.0°C, while afternoon highs average 26.0°C.
Is Key West good in winter?
In winter (December-February), Key West scores 8.0/10 on average — Decent period conditions for cultural visits.. The best month overall remains April with a score of 8.8/10.
When should you avoid Key West?
September is the most difficult month to visit Key West, with September has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Key West in May?
In May, the sea averages 29°C in Key West: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Key West in May?
The average UV index reaches 9 in May in Key West (very high), with about 13.2h of daylight. Protection essential.