May weather forecast and climate
Key Largo, FL

A clear seascape and cloudy evening sky in Key Largo, Florida
A clear seascape and cloudy evening sky in Key Largo, Florida

What is the temperature in May in Key Largo?

In Key Largo, in May, the average high-temperature is 86°F (30°C), and the average low-temperature is 69.8°F (21°C).

How many days does it rain in May in Key Largo?

In Key Largo, Florida, in May, it is raining for 10 days, with typically 6.6" (168mm) of accumulated precipitation.

How warm is the water in May in Key Largo?

The average seawater temperature, in May, in Key Largo, is 81°F (27.2°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.
Average temperature in May - Key Largo, FL
  • Average high temperature in May: 86°F

Warmest months (with the highest average high temperature) are July, August and September (90°F).
The month with the lowest average high temperature is January (75°F).

  • Average low temperature in May: 70°F

Months with the highest average low temperature are July, August and September (73°F).
Coldest months (with the lowest average low temperature) are January and February (57°F).

Average rainfall in May - Key Largo, FL
  • Average rainfall in May: 6.6"

The wettest month (with the highest rainfall) is June (10").
The driest month (with the lowest rainfall) is December (1.4").

Average rainfall days in May - Key Largo, FL
  • Average rainfall days in May: 10 days

Months with the highest number of rainy days are August and September (17 days).
The month with the lowest number of rainy days is April (5 days).

Average sea temperature in May - Key Largo, FL
  • Average sea temperature in May: 81°F

The best month for swimming (with the highest average sea temperature) is August (86.8°F).
The coldest month (with the lowest average sea temperature) is February (72.6°F).

Average daylight in May / Average sunshine in May - Key Largo, FL
  • Average daylight in May: 13.4h

The month with the longest days is June (Average daylight: 13.7h).
The month with shortest days is December (Average daylight: 10.6h).

  • Average sunshine in May: 10h

Months with most sunshine are April, May, June and July (Average sunshine: 10h).
Months with least sunshine are January, November and December (Average sunshine: 7).

Average UV index in May - Key Largo, FL
  • Average UV index in May: 11

Months with the highest UV index are April, May, June, July and August (UV index 11).
The month with the lowest UV index is December (UV index 5).

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