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August Weather in Marietta, United States

Last updated: June 24, 2025

In August, the average temperature in Marietta, United States hovers around 18°C (64°F). Expect a minimum of 10°C (51°F) and a maximum of 30°C (86°F), offering a pleasant range for outdoor activities. With an average precipitation of 19 mm (0.8 in) over just 3 days, you might want to keep an umbrella handy. The average humidity sits at a comfortable 77%, making for a refreshing atmosphere.

August Temperature in Marietta

In August in Marietta, the average temperature is 18°C (64°F). Maximums can reach 30°C (86°F), while minimums can drop as low as 10°C (51°F). This pleasant range makes it an ideal destination for travelers seeking comfortable weather and outdoor activities.

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 18°C (64°F), with highs reaching up to 30°C (86°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec413943485358636460514641
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 precipitation amount averaged 19 mm (0.8 in) over a span of 3 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 19 mm (0.8 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec19918515612776582720125186261227
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 77%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making it feel muggy and potentially uncomfortable for traveling, as sweat clings to your skin and the air thickens around you.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%86%86%81%83%84%77%76%88%87%87%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
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 Weather5°C (41°F)199 mm (7.8 inches)86%low
February Weather4°C (39°F)185 mm (7.3 inches)85%moderate
March Weather6°C (44°F)156 mm (6.2 inches)86%moderate
April Weather9°C (48°F)127 mm (5.0 inches)86%high
May Weather12°C (53°F)76 mm (3.0 inches)81%very high
June Weather15°C (59°F)58 mm (2.3 inches)83%very high
July Weather17°C (63°F)27 mm (1.1 inches)84%very high
August Weather18°C (64°F)19 mm (0.8 inches)77%very high
September Weather15°C (60°F)125 mm (4.9 inches)76%high
October Weather11°C (51°F)186 mm (7.3 inches)88%moderate
November Weather8°C (46°F)261 mm (10.3 inches)87%low
December Weather5°C (41°F)227 mm (8.9 inches)87%low

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