St. Petersburg, FL weather in August: average temperature & climate

Historical temperature average in August

In St. Petersburg, Florida, United States

87°F

highs

79°F

lows

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General weather summary

Very warm, sticky

Feels like

38%

Chance of rain

0.192 in

Amount

9.0 mph

Wind speed

75%

Humidity

13.1 hrs

Daylight length

7:00 AM

Sunrise

8:07 PM

Sunset

38%

Cloud cover

Sleeveless shirt

What to wear

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What is the average temperature in August

The average temperature in St. Petersburg in August for a typical day ranges from a high of 87°F (31°C) to a low of 79°F (26°C). Some would describe it as very warm, sticky.

For comparison, the hottest month in St. Petersburg, August, has days with highs of 87°F (31°C) and lows of 79°F (26°C). The coldest month, January has days with highs of 68°F (20°C) and lows of 55°F (13°C). This graph shows how an average day looks like in St. Petersburg in August based on historical data.

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Highs and lows in St. Petersburg in Aug

How much does it rain in August

In St. Petersburg in August, there's a 38% chance of rain on an average day. And on the average day it rains or snows, we get 0.51 in (12.9 mm) of precipitation. In more common terms of how much that is, some would describe it as moderate rain.

The wettest month in St. Petersburg is August where a typical day has a 38% chance of precipitation and gets 0.20 inches (5.0 mm) of precipitation, while the dryest month in St. Petersburg is November where a typical day has a 11% chance of precipitation and gets 0.20 inches (5.2 mm) of precipitation. These graphs show the probability of it raining/snowing in August and the amount of rainfall.

Chance of rain or snow on an average St. Petersburg day by month

Average precipitation by hour of day

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How cloudy is St. Petersburg in August

The average amount of time that the sky is clear or sunny (partly cloudy or less) in St. Petersburg during August is 9.1 hours (38% of the day). For comparison, the month with the most clear, sunny days in St. Petersburg is November with an average of 15.3 hours per day while August has the shortest amount of cloud-free hours with only 9.1 hours per day. This graph shows the average amount of sunshine in St. Petersburg in August based on historical data.

Monthly clear skies percent of time in St. Petersburg

When is sunrise and sunset in August

The average day in St. Petersburg during August has 13.1 hours of daylight, with sunrise at 7:00 AM and sunset at 8:07 PM.

The day with the longest amount of daylight in St. Petersburg is June 17th with 13.9 hours while December 19th has the shortest amount of daylight with only 10.4 hours.

This graph shows the average amount of daylight in St. Petersburg in August based on historical data.

Average hours of daylight in St. Petersburg by month

How humid is it in August

In August, St. Petersburg is moderately humid with an average amount of 75% (relative humidity), which could be described as sticky. December has the highest relative humidity at 79% and is the least humid in May at 67%. This graph shows the average amount of humidity in St. Petersburg throughout August based on historical data.

Average relative humidity in St. Petersburg by month

How windy is it in August

Historically, the wind in St. Petersburg during August blows at an average speed of 9.0 mph (14.5 kph). The windiest month is January with an average wind speed of 14.3 mph (23.0 kph), while the calmest month is July with an average wind speed of 8.3 mph (13.4 kph). This graph shows the average wind speed in St. Petersburg in August based on historical data.

Average monthly wind speed in St. Petersburg

What to wear in August

With an average high of 87°F (31°C) and a low of 79°F (26°C), it generally feels very warm, sticky. There might also be a small chance of rain. With that in mind, most people would dress in something very light like a sleeveless shirt

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What's the weather like in St. Petersburg the rest of the year

We've collected the weather data for St. Petersburg during all other months of the year too:

Where does this data come from

Weather data for St. Petersburg was collected from the MERRA-2 project from NASA, which used a climate model combined with historical data from weather stations around the world to estimate what the conditions were like for every point on the Earth.

For all data based on historical data, we've averaged the data from the past 11 years (2010-2020). For example, for the hourly temperature at 10am, we've looked at the temperature at 10am on every day in August (e.g., August 1, August 2, etc. in 2010, 2011, etc.) and took the arithmetic mean. We did not smooth the data, so for example, our daily temperature line will have some randomness due to the fact that weather is random in the first place.

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