Weather factors to check
- Summer heat indices amplified by high humidity
Air Quality
Key West Air Quality App
Air quality is part of everyday weather planning, especially for workouts, commuting, wildfire smoke, heat, and sensitive groups. A local forecast should make that context easy to act on in Key West.
Local Air Quality Answer
Quick answer for Key West air quality
Air quality planning in Key West works best when weather context is included, because heat, humidity, wind, smoke, dust, and stagnant air can change outdoor risk quickly.
When conditions can shift
August through October is Key West's most critical window, when peak hurricane risk overlaps with the heaviest wet-season rainfall.
Best planning uses
- Checking marine and boating conditions
- Tracking hurricanes approaching from any direction
- Timing showers around sunset and outdoor plans
- Monitoring heat and humidity before fishing or diving trips
Air quality changes how weather feels
For Key West, temperature, humidity, wind, and air quality together determine whether outdoor plans feel comfortable or risky.
Plan before you head outside
WeatherAI helps connect air quality with forecast timing so you can adjust workouts, commutes, errands, and travel plans around Key West.
Local Weather Context for Key West
Key West has a tropical savanna climate and ranks among the warmest cities in the United States. At Key West International Airport, the 1991-2020 reference averages range from a daily high of 76°F (24°C) in Jan to 91°F (33°C) in Aug. Monthly precipitation averages sum to 40.4 inches (1027 mm) per year.
The dry season (November-April) brings steady trade winds, low humidity, and near-constant sunshine. The wet season runs May through October with muggy heat and passing showers and thunderstorms. Hurricane season spans June through November, and as a low-lying island surrounded by warm water, Key West is exposed to storms approaching from the Atlantic, Caribbean, or Gulf. Winter cold fronts occasionally reach the Keys, dropping temperatures into the 60s.
Local Planning Guide
How to Plan Around Key West Weather
August through October is Key West's most critical window, when peak hurricane risk overlaps with the heaviest wet-season rainfall.
Local Hazards to Watch
- Hurricane and storm surge risk on a low-lying island
- Frequent waterspouts in the surrounding waters
- Rip currents and hazardous marine conditions
- Summer heat indices amplified by high humidity
Best WeatherAI Uses Here
- Checking marine and boating conditions
- Tracking hurricanes approaching from any direction
- Timing showers around sunset and outdoor plans
- Monitoring heat and humidity before fishing or diving trips
Radar and Alert Context
On a small island surrounded by warm water, marine warnings, waterspout-prone storm cells, and tropical alerts matter as much as standard land-based forecasts.
More Key West Weather Pages
Related local weather pages for nearby forecasts, radar, alerts, and conditions.
Local Weather Radar
Key West Weather Radar Guide: Reading Local Storms
How to read Key West weather radar: storm motion, precipitation type, and what to check before rain reaches your neighborhood.
Local Storm Tracker
Key West Storm Tracker App
Track storms near Key West with radar loops, storm movement, local alerts, saved places, and WeatherAI storm tracking features for iPhone, iPad, Mac, and Vision Pro.
Local Alerts
Key West Weather Alerts App
Get local weather alert guidance for Key West, including severe weather, wind, rain, heat, and daily planning notifications in WeatherAI.
Useful Guides and Tools
Use these resources to interpret local conditions and plan around changing weather.
Tool
Wind Chill Calculator
Estimate cold-weather exposure risk from temperature and wind speed.
Use Case
Weather App for Runners
Time runs around heat, humidity, and air quality with hour-by-hour conditions.
Guide
Lightning Safety Guide
Know when lightning becomes dangerous, how far away it can strike, and when to move indoors.
Glossary
Humidity
The amount of water vapor present in the air.
Bring Key West Weather Into the App
WeatherAI gives you local forecasts, radar, alerts, air quality, and conversational weather answers for iPhone, iPad, Mac, and Vision Pro.