August weather forecast
Saint Lucie, FL

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Weather in August

The last month of the summer, August, is another hot month in Saint Lucie, Florida, with an average temperature ranging between max 87.6°F (30.9°C) and min 78.4°F (25.8°C).

Temperature

August brings the highest temperatures, with an average high of 87.6°F (30.9°C) and an average low of 78.4°F (25.8°C).

Heat index

In August, the average heat index is calculated to be a scorching 104°F (40°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gives an indication of how one might feel in terms of heat after considering humidity. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The most humid month is August, with an average relative humidity of 79%.

Rainfall

The month with the most rainfall in Saint Lucie is August, when the rain falls for 28.1 days and typically aggregates up to 8.23" (209mm) of precipitation.

Daylight

In Saint Lucie, the average length of the day in August is 13h and 5min.
On the first day of the month, sunrise is at 6:45 am and sunset at 8:10 pm. On the last day of August, sunrise is at 7:00 am and sunset at 7:42 pm EDT.

Sunshine

In August, the average sunshine in Saint Lucie is 10.6h.

UV index

The months with the highest UV index in Saint Lucie, Florida, are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 7 during August translates into the following recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest in Saint Lucie?

Saint Lucie's warmest month, August, generally records average temperatures ranging from a high of 87.6°F (30.9°C) to a low of 78.4°F (25.8°C).

How hot is August in Saint Lucie?

In August, the average high-temperature and low-temperature in Saint Lucie are 87.6°F (30.9°C) and 78.4°F (25.8°C) respectively. The average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is calculated to be 104°F (40°C).

What is the most humid month in Saint Lucie?

August is the most humid month, with an average relative humidity of 79%.

What is the average humidity in August in Saint Lucie?

The average relative humidity in August is 79%.

What is the rainiest month in Saint Lucie?

August is the month with the most rainfall in Saint Lucie. Rain falls for 28.1 days and accumulates 8.23" (209mm) of precipitation.

How much does it rain in Saint Lucie in August?

In Saint Lucie, in August, during 28.1 rainfall days, 8.23" (209mm) of precipitation is typically accumulated.

How many hours of daylight does Saint Lucie have in August?

In August, the average day length is 13h and 5min.

What time are sunrise and sunset in August in Saint Lucie?

In August, on the first day of the month, sunrise is at 6:45 am and sunset at 8:10 pm. On the last day of the month, in Saint Lucie, Florida, sunrise is at 7:00 am and sunset at 7:42 pm EDT.

How long on average sun shines in August in Saint Lucie?

In August, the average sunshine duration in Saint Lucie, Florida, is 10.6h.

What is the month with the highest UV index in Saint Lucie?

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

What is the UV index reading in August in Saint Lucie?

In Saint Lucie, the average daily maximum UV index in August is 7. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Saint Lucie, FL

Average temperature in August - Saint Lucie, FL
  • Average high temperature in August: 87.6°F

The warmest month (with the highest average high temperature) is August (87.6°F).
The month with the lowest average high temperature is January (70.5°F).

  • Average low temperature in August: 78.4°F

The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (59.2°F).

Average pressure in August
Saint Lucie, FL

Average pressure in August - Saint Lucie, FL
  • Average pressure in August: 30"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).

Average wind speed in August
Saint Lucie, FL

Average wind speed in August - Saint Lucie, FL
  • Average wind speed in August: 6.8mph

The windiest months (with the highest average wind speed) are January and March (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

Average humidity in August
Saint Lucie, FL

Average humidity in August - Saint Lucie, FL
  • Average humidity in August: 79%

The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is March (72%).

Average rainfall in August
Saint Lucie, FL

Average rainfall in August - Saint Lucie, FL
  • Average rainfall in August: 8.23"

The wettest month (with the highest rainfall) is August (8.23").
The driest month (with the least rainfall) is February (1.26").

Average rainfall days in August
Saint Lucie, FL

Average rainfall days in August - Saint Lucie, FL
  • Average rainfall days in August: 28.1 days

The month with the highest number of rainy days is August (28.1 days).
The month with the least rainy days is January (11.3 days).

Average daylight in August /
Average sunshine in August
Saint Lucie, FL

Average daylight in August / Average sunshine in August - Saint Lucie, FL
  • Average daylight in August: 13h and 1min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in August: 10h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).

Average sunshine days in August
Saint Lucie, FL

Average sunshine days in August - Saint Lucie, FL
  • Average sunshine days in August: 0.8 days

The month with the most sunshine days is January (17 days).
The month with the least sunshine days is August (0.8 days).

Average UV index in August
Saint Lucie, FL

Average UV index in August - Saint Lucie, FL
  • Average UV index in August: 7

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

Average cloud cover in August
Saint Lucie, FL

Average cloud cover in August - Saint Lucie, FL
  • Average cloud cover in August: 29

The months with the most cloud cover are November and December (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 28).

Average visibility in August
Saint Lucie, FL

Average visibility in August - Saint Lucie, FL
  • Average visibility in August: 6mi

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

Saint Lucie, Florida, USA

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