Annual average weather for Key Largo, United States

Annual Temperature for Key Largo

The hottest month in Key Largo is August when the average maximum temperature is 32°, average temperature is 29° and average minimum temperature is 26°.

The coolest month in Key Largo is January when the average maximum temperature is 24°, average temperature is 20° and average minimum temperature is 17°.

Annual Sunshine for Key Largo

The longest days in Key Largo are in June, with an average of 13.7 hours of daylight per day. December has the shortest days with an average of 10.6 hours of daylight per day.

The sunniest days in Key Largo are in April which has the most hours of sunshine per day with an average of 9 hours of sunshine per day, making it a sunny month with few clouds. December has the least sunshine with an average of 6.9 hours of sunshine per day, making it a quite sunny month with some cloud cover.

The ultraviolet index is the highest in July when it reaches 12.5 and lowest in December when it reaches 5.5.

An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Annual Sea Temperature for Key Largo

The warmest sea water temperatures in Key Largo are found in September when they peak at 29° and lowest in January when they dip to 23°.

The sea is best for swimming between May and December when the temperature is above 26° which is very warm and ideal for relaxing and swimming for the whole day.

Annual Rainfall for Key Largo

The wettest month in Key Largo is March with 483.1cm of rain and September has the most days of rain with 19.1 days with some rain, a very wet time to visit the beach.

The driest month in Key Largo is December with 36.7cm of rain and April has the fewest days of rain with 6.2 days with some rain, a slightly wet time to visit the beach.

Annual Humidity for Key Largo

The most humid month in Key Largo is August with a dew point (an indicator of humidity) of 25° which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

The least humid month in Key Largo is January with a dew point of 18° which is somewhat uncomfortable for most people in cities but fine on a beach.

Annual Wind Speed for Key Largo

The most windy month in Key Largo is March when the average maximum windspeed is 28kmh and the average wind speed is 16kmh.

The least windy month in Key Largo is July when the average maximum windspeed is 24kmh and the average wind speed is 12kmh.

Monthly Averages

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