August weather forecast and climate
Fort Myers, FL

Dusk over the pier bridge in Fort Myers, Florida, with cloudy skies and calm waters below
Dusk over the pier bridge in Fort Myers, Florida, with cloudy skies and calm waters below

Weather in August

August, the last month of the summer, in Fort Myers, is another tropical month, with temperature in the range of an average high of 89.4°F (31.9°C) and an average low of 79°F (26.1°C).

Temperature

The warmest month is August, with an average high-temperature of 89.4°F (31.9°C) and an average low-temperature of 79°F (26.1°C).

Heat index

In August, the average heat index is estimated at a scorching 107.6°F (42°C). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like pregnancy, wind, clothing, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In August, the average relative humidity is 75%.

Rainfall

The month with the most rainfall is August when the rain falls for 22.7 days and typically aggregates up to 4.72" (120mm) of precipitation.

Ocean temperature

With an average ocean temperature of 86°F (30°C), August is the month with the warmest seawater.
Note: The surface water temperatures above 86°F (30°C) are arguably considered as unpleasant for swimming, and any intense water activity, as the refreshing effect of water is missing.

Daylight

In August, the average length of the day in Fort Myers, Florida, is 13h.

Sunshine

The average sunshine in Fort Myers is 9.6h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Fort Myers. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the warmest month in Fort Myers?

August is the warmest month in Fort Myers, with an average high-temperature of 89.4°F (31.9°C) and an average low-temperature of 79°F (26.1°C).

What is the temperature in August in Fort Myers?

In August, in Fort Myers, Florida, the average high-temperature is 89.4°F (31.9°C), and the average low-temperature is 79°F (26.1°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), that calculates temperature value influenced by the moisture in the air, in August is estimated at 107.6°F (42°C).

What is the average humidity in August in Fort Myers?

In August, the average relative humidity in Fort Myers, Florida, is 75%.

How much does it rain in Fort Myers in August?

In Fort Myers, in August, it is raining for 22.7 days, with typically 4.72" (120mm) of accumulated precipitation.

What is the rainiest month in Fort Myers?

August is the month with the most rainfall in Fort Myers, Florida. Rain falls for 22.7 days and accumulates 4.72" (120mm) of precipitation.

When is the ocean warmest in Fort Myers?

August is the month with the warmest seawater in Fort Myers, with an average ocean temperature of 86°F (30°C).

What is the ocean temperature in August in Fort Myers?

In Fort Myers, the average seawater temperature in August is 86°F (30°C). For swimming, other intense water activities, temperature above 86°F (30°C) is arguably unpleasant, as the water cooling effect is missing.

What is the average length of the day in August in Fort Myers?

In Fort Myers, Florida, the average length of the day in August is 13h.

How many hours of sunshine does Fort Myers have in August?

The average sunshine in August is 9.6h.

When is the highest UV index in Fort Myers?

May through September, with an average maximum UV index of 7, are months with the highest UV index.

How high is the UV index in August in Fort Myers?

The average daily maximum UV index in August in Fort Myers, Florida, is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in August
Fort Myers, FL

Average temperature in August - Fort Myers, FL
  • Average high temperature in August: 89.4°F

The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is January (71.1°F).

  • Average low temperature in August: 79°F

The month with the highest average low temperature is August (79°F).
The coldest month (with the lowest average low temperature) is January (56.7°F).

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Average pressure in August
Fort Myers, FL

Average pressure in August - Fort Myers, FL
  • Average pressure in August: 29.98"

The month with the highest atmospheric pressure is January (30.12").
The month with the lowest atmospheric pressure is September (29.95").

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Average wind speed in August
Fort Myers, FL

Average wind speed in August - Fort Myers, FL
  • Average wind speed in August: 6mph

The windiest months (with the highest average wind speed) are October and November (8.1mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

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Average humidity in August
Fort Myers, FL

Average humidity in August - Fort Myers, FL
  • Average humidity in August: 75%

Months with the highest relative humidity are September and December (76%).
The month with the lowest relative humidity is March (71%).

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Average rainfall in August
Fort Myers, FL

Average rainfall in August - Fort Myers, FL
  • Average rainfall in August: 4.72"

The wettest month (with the highest rainfall) is August (4.72").
The driest months (with the least rainfall) are February and March (0.63").

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Average rainfall days in August
Fort Myers, FL

Average rainfall days in August - Fort Myers, FL
  • Average rainfall days in August: 22.7 days

The month with the highest number of rainy days is August (22.7 days).
The month with the least rainy days is January (6.3 days).

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Average sea temperature in August
Fort Myers, FL

Average sea temperature in August - Fort Myers, FL
  • Average sea temperature in August: 86°F

The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest month (with the lowest average sea temperature) is February (70°F).

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Average daylight in August /
Average sunshine in August
Fort Myers, FL

Average daylight in August / Average sunshine in August - Fort Myers, FL
  • Average daylight in August: 13h

The month with the longest days is June (Average daylight: 13.8h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in August: 9.6h

Months with the most sunshine are May and July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in August
Fort Myers, FL

Average sunshine days in August - Fort Myers, FL
  • Average sunshine days in August: 5.9 days

The month with the most sunshine days is January (23 days).
The month with the least sunshine days is August (5.9 days).

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Average UV index in August
Fort Myers, FL

Average UV index in August - Fort Myers, FL
  • Average UV index in August: 7

Months with the highest UV index are May, June, July, August and September (UV index 7).
Months with the lowest UV index are January, February and December (UV index 5).

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Average cloud cover in August
Fort Myers, FL

Average cloud cover in August - Fort Myers, FL
  • Average cloud cover in August: 28

Months with the most cloud cover are January and December (Cloud cover 29).
Months with the least cloud cover are March, April and May (Cloud cover 24).

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Average visibility in August
Fort Myers, FL

Average visibility in August - Fort Myers, FL
  • Average visibility in August: 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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