January 9 is statistically one of the best days of the year in Key West. With minimal rain risk (10%) and pleasant highs of 23°C, it's ideal for outdoor adventures. Key West is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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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 January 9
"Mild & Comfortable. Expect average highs of 22.5°C. 10% chance of rain."
What to Wear in Key West in January
Based on historical data for January 9, Key West typically experiences temperatures between 20.1°C and 22.5°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (10% 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
22.5°C
Daytime Peak
Average Low
20.1°C
Nighttime Low
Feels Like
22.9°C
☀️ Feels accurate
Rain Chance
10%
Avg 0.4mm if it rains
Cloud Cover
46%
Overcast
Pressure
1019.6 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 90% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 160 min to burn
Type III-IV
🟡 240 min to burn
Type V-VI
🟢 400 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
18.1°C
Noticeable
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
High
85/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~33
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Key West
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:14
☀️ Noon
12:35
🌇 Sunset
17:56
⏱️ Daylight
10h 42m
Wind Speed
30.1 km/h
Fresh breeze
Sunshine
8.7 hrs
Direct Sun (Cloud-free)
Humidity
76%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Key West
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
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Travel Health & Safety in Key West
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
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 January 9 averages 22.5°C with a 10% precipitation probability. Wedding/Outdoor Event Score: 90/100."
— 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
January 3
23.1°C • 5% rain
Score
96
January 2
23.3°C • 5% rain
Score
95
January 4
22.9°C • 8% rain
Score
95
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (January 9) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Key West Worth Visiting on January 9?
Planning a trip to Key West on January 9? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 22.5°C with a 10% historical precipitation risk.
✈️ Travel Logistics: Approximately 33 landing slots available daily during this period, indicating manageable crowd levels.
🌊 Coastal Conditions: Water temperature averages 23.6°C (swimming pool). Wave conditions are generally fun waves with heights around 1.08m.
📊 Historical Extremes: The hottest January 9 recorded in the last 30 years saw temperatures hit 25.8°C in 2024, while the coldest dropped to 15.4°C in 2025.