The highest day temperature in May 2026 was 96°F. The lowest night temperature was 48°F. The average values for day and night temperatures during May were 80.6°F и 64.4°F respectivly.

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in May for Marietta is 1.3 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 6.3 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Marietta in May is 7.9 hours.