May 9 is statistically one of the best days of the year in Key West. With minimal rain risk (6%) and pleasant highs of 27°C, it's ideal for outdoor adventures. Expect a bustling atmosphere in Key West right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Key West
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Safety
Moderate Safety
GPI: 2.44
Key West Weather Forecast for May 9
"Warm & Sunny. Expect average highs of 26.5°C. 6% chance of rain."
What to Wear in Key West in May
Based on historical data for May 9, Key West typically experiences temperatures between 25.1°C and 26.5°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (6% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Key West
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
26.5°C
Daytime Peak
Average Low
25.1°C
Nighttime Low
Feels Like
27.6°C
☀️ Minor difference
Rain Chance
6%
Avg 0.1mm if it rains
Cloud Cover
29%
Overcast
Pressure
1016 hPa
Low volatility
Key West Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 97% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 50+, limit exposure 10am-4pm
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 10 min to burn
Type III-IV
🟡 15 min to burn
Type V-VI
🟢 25 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.7°C
Humid/Sticky
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
High
90/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~35
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Key West
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:48
☀️ Noon
12:24
🌇 Sunset
19:01
⏱️ Daylight
13h 13m
Wind Speed
28 km/h
Moderate wind
Sunshine
12.2 hrs
Direct Sun (Cloud-free)
Humidity
75%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Key West
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Key West
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
Atlantic Hurricane Risk
Season: Jun - Nov
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Key West on May 9 averages 26.5°C with a 6% precipitation probability. Wedding/Outdoor Event Score: 97/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Key West Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 7
26.3°C • 4% rain
Score
98
May 8
26.4°C • 3% rain
Score
98
May 10
26.6°C • 9% rain
Score
98
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 9) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Key West Worth Visiting on May 9?
Planning a trip to Key West on May 9? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 26.5°C with a 6% historical precipitation risk.
✈️ Travel Logistics: Approximately 35 landing slots available daily during this period, indicating manageable crowd levels.
🌊 Coastal Conditions: Water temperature averages 27.7°C (tropical bath). Wave conditions are generally fun waves with heights around 0.93m.
📊 Historical Extremes: The hottest May 9 recorded in the last 30 years saw temperatures hit 28.7°C in 2019, while the coldest dropped to 24.3°C in 2017.