Key Largo Weather in May

The climate in Key Largo during May can be summarized as hot, humid and wet.

May is in the spring in Key Largo and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 30°C (86°F), whilst at night 20°C (69°F) is normal.

On average May is the 5th wettest month of the year in Key Largo with around 166mm 6.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.4 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Key Largo in May 2025.