Visitors to the northernmost island of the Florida Keys during the fifth month of the year can expect subtropical conditions. Daytime temperatures typically range from the low to high 80s Fahrenheit (high 20s to low 30s Celsius), while nighttime lows average in the mid-70s Fahrenheit (low 20s Celsius). Sea surface temperatures are also pleasant, usually in the low 80s Fahrenheit (high 20s Celsius), ideal for swimming and other water activities. Rainfall is possible but less frequent than in the summer months.
Planning a trip during this specific period offers several advantages. The pleasant temperatures create ideal conditions for outdoor activities such as snorkeling, diving, fishing, and exploring the island’s natural beauty. The lower humidity and reduced rainfall compared to the summer months also contribute to a more comfortable experience. Historically, this period has been a popular time for tourism in the Florida Keys, contributing significantly to the local economy.