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August Weather in Marietta, United States

Last updated: June 24, 2025

In Marietta, United States, the average temperature in August is a warm 28°C (83°F). Be prepared for some fluctuations, as the temperature can drop to a comfortable 19°C (66°F) or soar to a sizzling 39°C (103°F). During this month, you can expect about 94 mm (3.7 in) of precipitation over 7 days, with an average humidity level of 66%.

August Temperature in Marietta

In August in Marietta, the average temperature is 28°C (83°F), with maximums reaching 39°C (103°F) and minimums dropping as low as 19°C (66°F). Be sure to pack light clothing and stay hydrated while enjoying your travels!

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 28°C (83°F), with highs reaching up to 39°C (103°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec434657637280848377655448
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 is 94 mm (3.7 in) over a span of 7 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 94 mm (3.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec6184959612210348941021385157
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 66%. With an average temperature of 28°C (83°F), this humidity feels like walking through a warm blanket, making travel quite uncomfortable and sticky, requiring frequent breaks to hydrate and seek 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 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
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 Weather6°C (44°F)61 mm (2.4 inches)80%moderate
February Weather8°C (46°F)84 mm (3.3 inches)79%high
March Weather14°C (58°F)95 mm (3.7 inches)78%very high
April Weather17°C (63°F)96 mm (3.8 inches)78%very high
May Weather22°C (73°F)122 mm (4.8 inches)81%extreme
June Weather27°C (80°F)103 mm (4.1 inches)78%extreme
July Weather29°C (84°F)48 mm (1.9 inches)73%extreme
August Weather28°C (83°F)94 mm (3.7 inches)66%extreme
September Weather25°C (77°F)102 mm (4.0 inches)65%very high
October Weather18°C (65°F)138 mm (5.4 inches)72%very high
November Weather12°C (54°F)50 mm (2.0 inches)82%high
December Weather9°C (49°F)57 mm (2.2 inches)87%moderate

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