August 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 warmest month in Key Largo?

Warmest months are July through September, with an average high-temperature of 89.6°F (32°C).

What is the temperature in August in Key Largo?

In August, the average high-temperature is 89.6°F (32°C), and the average low-temperature is 73.4°F (23°C).

How much does it rain in Key Largo in August?

In Key Largo, during August, the rain falls for 17 days and regularly aggregates up to 6.5" (166mm) of precipitation.

When is the sea warmest in Key Largo?

Month with the warmest seawater in Key Largo is August, with an average sea temperature of 86.7°F (30.4°C). For swimming, other intense water activities, temperature above 86°F (30°C) is arguably unpleasant, as the water cooling effect is missing.

How warm is the water in August in Key Largo?

In August, the average sea temperature is 86.7°F (30.4°C). For swimming, other intense water activities, temperature above 86°F (30°C) is arguably unpleasant, as the water cooling effect is missing.
Average temperature in August - Key Largo, FL
  • Average high temperature in August: 90°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 August: 73°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 August - Key Largo, FL
  • Average rainfall in August: 6.5"

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 August - Key Largo, FL
  • Average rainfall days in August: 17 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 August - Key Largo, FL
  • Average sea temperature in August: 86.8°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 August / Average sunshine in August - Key Largo, FL
  • Average daylight in August: 13h

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 August: 9h

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 August - Key Largo, FL
  • Average UV index in August: 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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