October 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

Weather in October

October, like September, in Key Largo, Florida, is another warm autumn month, with average temperature fluctuating between 78.8°F (26°C) and 82.2°F (27.9°C).

Temperature

In October, the average high-temperature is almost the same as in September - a still warm 82.2°F (27.9°C). The average low-temperature, in Key Largo, is 78.8°F (26°C).

Heat index

In October, the average heat index is evaluated at a tropical 88°F (31.1°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, pregnancy, wind, and differences in body mass, height, and shape affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in October is 75%.

Rainfall

In Key Largo, in October, it is raining for 18.2 days, with typically 3.19" (81mm) of accumulated precipitation. Throughout the year, there are 190.1 rainfall days, and 27.05" (687mm) of precipitation is accumulated.

Ocean temperature

In Key Largo, in October, the average water temperature is 82.9°F (28.3°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In October, the average length of the day in Key Largo is 11.6h.

Sunshine

In Key Largo, Florida, the average sunshine in October is 6.9h.

UV index

Months with the highest UV index in Key Largo are April through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 7 in October transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in October in Key Largo?

The average high-temperature, in October, in Key Largo, is 82.2°F (27.9°C), while the average low-temperature is 78.8°F (26°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), that combines relative humidity and air temperature, in October is evaluated at 88°F (31.1°C).

What is the average humidity in October in Key Largo?

In Key Largo, Florida, the average relative humidity in October is 75%.

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

In October, in Key Largo, Florida, the rain falls for 18.2 days. Throughout October, 3.19" (81mm) of precipitation is accumulated.

How warm is the water in October in Key Largo?

In Key Largo, Florida, the average seawater temperature in October is 82.9°F (28.3°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.

What is the average length of the day in October in Key Largo?

In Key Largo, Florida, the average length of the day in October is 11.6h.

How many hours of sunshine does Key Largo have in October?

In Key Largo, Florida, the average sunshine in October is 6.9h.

When is the highest UV index in Key Largo?

April through October, with an average maximum UV index of 7, are months with the highest UV index in Key Largo.

How high is the UV index in October in Key Largo?

In October, the average daily maximum UV index in Key Largo is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in October
Key Largo, FL

Average temperature in October - Key Largo, FL
  • Average high temperature in October: 82.2°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.7°F).

  • Average low temperature in October: 78.8°F

The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (66.9°F).

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Average pressure in October
Key Largo, FL

Average pressure in October - Key Largo, FL
  • Average pressure in October: 29.94"

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are September and October (29.94").

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Average wind speed in October
Key Largo, FL

Average wind speed in October - Key Largo, FL
  • Average wind speed in October: 12.5mph

The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).

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Average humidity in October
Key Largo, FL

Average humidity in October - Key Largo, FL
  • Average humidity in October: 75%

Months with the highest relative humidity are February, June and December (76%).
The month with the lowest relative humidity is March (73%).

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Average rainfall in October
Key Largo, FL

Average rainfall in October - Key Largo, FL
  • Average rainfall in October: 3.19"

The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is March (0.59").

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Average rainfall days in October
Key Largo, FL

Average rainfall days in October - Key Largo, FL
  • Average rainfall days in October: 18.2 days

The month with the highest number of rainy days is September (22.9 days).
The month with the least rainy days is February (9.7 days).

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Average sea temperature in October
Key Largo, FL

Average sea temperature in October - Key Largo, FL
  • Average sea temperature in October: 82.9°F

The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (74°F).

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Average daylight in October /
Average sunshine in October
Key Largo, FL

Average daylight in October / Average sunshine in October - Key Largo, FL
  • Average daylight in October: 11.6h

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

  • Average sunshine in October: 6.9h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 6.4h).

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Average sunshine days in October
Key Largo, FL

Average sunshine days in October - Key Largo, FL
  • Average sunshine days in October: 9.1 days

The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is September (5.2 days).

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Average UV index in October
Key Largo, FL

Average UV index in October - Key Largo, FL
  • Average UV index in October: 7

Months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).

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Average cloud cover in October
Key Largo, FL

Average cloud cover in October - Key Largo, FL
  • Average cloud cover in October: 35

The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).

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Average visibility in October
Key Largo, FL

Average visibility in October - Key Largo, FL
  • Average visibility in October: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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