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August Weather in Marietta, United States

Last updated: June 24, 2025

In August, the average temperature in Marietta, United States is a comfortable 23°C (74°F), making it an ideal time to explore. Expect some variation, with temperatures dipping to a minimum of 13°C (55°F) and soaring to a maximum of 35°C (94°F). Be prepared for moisture, as you'll encounter 110 mm (4.3 in) of precipitation over 13 days, and enjoy the warm, humid climate with an average humidity of 73%.

August Temperature in Marietta

In August in Marietta, the average temperature is 23°C (74°F), with maximums reaching up to 35°C (94°F) and minimums dropping as low as 13°C (55°F). This mild and variable climate makes it an ideal destination for travelers seeking both warm days and cool evenings.

August Weather in Marietta: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Marietta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marietta, August typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (94°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec333745546472767470594438
Data source: Temperature data for Marietta generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Marietta

In Marietta in August, the total precipitation amount is 110 mm (4.3 in) over the course of 13 days.

August Precipitation Trends in Marietta

The chart displays monthly precipitation patterns in Marietta, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Marietta, August typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec9112111614614316412311010711686115
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Marietta

In Marietta in August, humidity is 73%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping blanket, making traveling a bit sweaty and heavy, but still pleasant if you stay hydrated and take breaks in the shade.

August Average Humidity in Marietta

This chart illustrates the average monthly humidity levels in Marietta, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Marietta is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Marietta

In Marietta in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Marietta.

Maximum UV Index Levels in Marietta for August

The chart shows the monthly maximum UV Index (UVI) for Marietta in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Marietta typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Marietta August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Marietta Compares to Other Months

Weather in Marietta varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Marietta, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Marietta, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)91 mm (3.6 inches)88%moderate
February Weather3°C (38°F)121 mm (4.8 inches)88%moderate
March Weather7°C (45°F)116 mm (4.6 inches)88%high
April Weather12°C (54°F)146 mm (5.7 inches)86%very high
May Weather18°C (65°F)143 mm (5.6 inches)82%very high
June Weather22°C (72°F)164 mm (6.5 inches)84%very high
July Weather25°C (76°F)122 mm (4.8 inches)82%very high
August Weather23°C (74°F)110 mm (4.3 inches)73%very high
September Weather21°C (70°F)107 mm (4.2 inches)73%very high
October Weather15°C (59°F)116 mm (4.6 inches)81%high
November Weather7°C (44°F)86 mm (3.4 inches)89%moderate
December Weather3°C (39°F)115 mm (4.5 inches)86%moderate

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