Key Largo, Florida, United States of America - Hourly past weather, almanac for Key Largo including historical temperature, wind, rain, pressure and humidity stats | WorldWeatherOnline.com, Currently: 83 °F. Passing clouds. (Weather station: Miami International Airport, USA). See more current weather. * Reported May 30 9:53 pm — Jun 14 9:53 pm, Key Largo. Weather by CustomWeather, © 2025. Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals, Get the monthly weather forecast for Key Largo, FL, including daily high/low, historical averages, to help you plan ahead., Data is available up to July 2, 2025. Interested in weather history? Access weather history data for dates going back to 1945! It's both useful and fun—whether you're planning a trip or just want to know the weather on a special date., What's the weather like in Key Largo (Florida) in March 2025? The climate in Key Largo during March can be summarized as warm, humid and reasonably dry. March is in the spring in Key Largo and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 16°C (61°F) is normal., Key Largo weather data is sourced from official meteorological authorities worldwide, ensuring accuracy and reliability. Historical weather for Key Largo based on the the last few years of weather forecast for Key Largo..