August weather forecast
St. Augustine, FL

Palm trees and colorful houses in front of water fountains in a popular town square in St. Augustine, Florida
Palm trees and colorful houses in front of water fountains in a popular town square in St. Augustine, Florida

Weather in August

The last month of the summer, August, is another hot month in St. Augustine, with an average temperature varying between 89.1°F (31.7°C) and 73°F (22.8°C).

Temperature

In August, the average high-temperature in St. Augustine, Florida, is practically the same as in July - a still hot 89.1°F (31.7°C). In St. Augustine, the average low-temperature is 73°F (22.8°C).

Rainfall

In St. Augustine, during August, the rain falls for 15 days and regularly aggregates up to 6.5" (165mm) of precipitation. Throughout the year, in St. Augustine, there are 116 rainfall days, and 50" (1270mm) of precipitation is accumulated.

Ocean temperature

The month with the warmest seawater in St. Augustine is August, with an average ocean temperature of 83.8°F (28.8°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 St. Augustine, Florida, the average length of the day in August is 13h and 11min.
On the first day of August in St. Augustine, Florida, sunrise is at 6:44 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 7:49 pm EDT.

Sunshine

March through August, with an average of 9h of sunshine, are months with the most sunshine in St. Augustine.

UV index

In St. Augustine, Florida, the average daily maximum UV index in August is 10. A UV Index of 8 to 10 symbolizes a very high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 10 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. 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 August in St. Augustine?

In St. Augustine, Florida, in August, the average high-temperature is 89.1°F (31.7°C), and the average low-temperature is 73°F (22.8°C).

How many days does it rain in August in St. Augustine?

In St. Augustine, Florida, in August, during 15 rainfall days, 6.5" (165mm) of precipitation is typically accumulated.

What month is the ocean warmest in St. Augustine?

August is the month with the warmest seawater in St. Augustine, with an average ocean temperature of 83.8°F (28.8°C).

How warm is the water in August in St. Augustine?

In August, the average ocean temperature in St. Augustine, Florida, is 83.8°F (28.8°C). 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.

How many hours of daylight does St. Augustine have in August?

In St. Augustine, Florida, the average day length in August is 13h and 11min.

When are sunrise and sunset in August in St. Augustine?

In August, on the first day of the month, sunrise is at 6:44 am and sunset at 8:18 pm. On the last day of the month, in St. Augustine, sunrise is at 7:01 am and sunset at 7:49 pm EDT.

What are the months with the most sunshine in St. Augustine?

March through August, with an average of 9h of sunshine, are months with the most sunshine in St. Augustine, Florida.

How long on average sun shines in August in St. Augustine?

The average sunshine duration in August in St. Augustine is 9h.

What is the UV index reading in August in St. Augustine?

In St. Augustine, Florida, the average daily maximum UV index in August is 10. A UV Index estimate of 8 to 10 represents a very high health risk from unprotected exposure to UV radiation.
Average rainfall days
Average sunshine
Average UV index

Average temperature in August
St. Augustine, FL

Average temperature in August - St. Augustine, FL
  • Average high temperature in August: 89°F

The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (66°F).

  • Average low temperature in August: 73°F

The month with the highest average low temperature is August (73°F).
The coldest month (with the lowest average low temperature) is January (46°F).

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Average rainfall in August
St. Augustine, FL

Average rainfall in August - St. Augustine, FL
  • Average rainfall in August: 6.5"

The wettest month (with the highest rainfall) is September (7.5").
The driest month (with the least rainfall) is November (2.3").

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Average rainfall days in August
St. Augustine, FL

Average rainfall days in August - St. Augustine, FL
  • Average rainfall days in August: 15 days

The months with the highest number of rainy days are July and August (15 days).
The month with the least rainy days is April (6 days).

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Average sea temperature in August
St. Augustine, FL

Average sea temperature in August - St. Augustine, FL
  • Average sea temperature in August: 83.8°F

The best month for swimming (with the highest average sea temperature) is August (83.8°F).
The coldest months (with the lowest average sea temperature) are January and February (64.3°F).

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Average daylight in August /
Average sunshine in August
St. Augustine, FL

Average daylight in August / Average sunshine in August - St. Augustine, FL
  • Average daylight in August: 13h and 11min

The month with the longest days is June (Average daylight: 14h and 2min).
The month with the shortest days is December (Average daylight: 10h and 16min).

  • Average sunshine in August: 9h

The months with the most sunshine are March, April, May, June, July and August (Average sunshine: 9h).
The month with the least sunshine is December (Average sunshine: 6h).

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Average UV index in August
St. Augustine, FL

Average UV index in August - St. Augustine, FL
  • Average UV index in August: 10

The months with the highest UV index are June and July (UV index 11).
The months with the lowest UV index are January and December (UV index 4).

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