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May Weather in Marietta, United States

Last updated: June 24, 2025

In May, the average temperature in Marietta, United States hovers around 18°C (65°F), but you could experience a range from a chilly -1°C (30°F) to a sweltering 32°C (90°F). Expect 143 mm (5.6 in) of precipitation over approximately 17 days, accompanied by an average humidity of a muggy 82%. Stay prepared for diverse weather conditions!

May Temperature in Marietta

In May in Marietta, the average temperature is 18°C (65°F). Maximums can reach 32°C (90°F), while minimums can dip as low as -1°C (30°F). It's a great time for travelers to experience mild weather, but be prepared for a range of temperatures to fully enjoy your visit.

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

The chart illustrates May 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, May typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (30°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.

May Precipitation in Marietta

In Marietta in May, the total precipitation amount is 143 mm (5.6 in) spread over 17 days.

May Precipitation Trends in Marietta

The chart displays monthly precipitation patterns in Marietta, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Marietta, May typically receives around 143 mm (5.6 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec9112111614614316412311010711686115
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Marietta

In Marietta in May, humidity is 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

May Average Humidity in Marietta

This chart illustrates the average monthly humidity levels in Marietta, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Marietta is approximately 82%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Marietta

In Marietta in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Marietta.

Maximum UV Index Levels in Marietta for May

The chart shows the monthly maximum UV Index (UVI) for Marietta in May, 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 May, the maximum UV index in Marietta typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Marietta May 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 May 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 May’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 May’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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