Marietta (GA) Sunshine Hours by Month

In climate discussions, the hours of sunlight reveal much about a location. This page shows the total number of hours of direct sunlight per month and the average hours per day in Marietta, Georgia, United States of America. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020.

Monthly hours of sunshine

Seasonal sunshine in Marietta varies. It peaks at 288 hours in May and drops to 164 hours in January. The total annual amount of sun is 2733 hours.

Daily hours of sunshine

In Marietta, summer days are longer and more sunny, with daily sunshine hours peaking at 9.6 hours in May. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 5.5 hours per day.

Average percent of sunshine

On average the sun shines 68% of the time during the day in October, the highest percentage of any month. January has the lowest percentage at 52%.

Marietta enjoys an average of 2733 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Barcelona, Spain, there are 2530 hours of sunshine annually and is a city that can be visited year-round.

In contrast, Brussels, Belgium, receives only about 1590 hours of sunshine per year, known for its frequently overcast and rainy skies.

Boston, USA, enjoys 2629 hours of sunshine annually, with distinct seasons and many bright, sunny days.

Melbourne, Australia, has 2380 hours of sunshine annually, with its famous “four seasons in a day” weather pattern.

December, Marietta’s wettest month, receives 106 mm (4.2 in) of rainfall and has a maximum daytime temperature of 13°C (55°F). During the driest month September you can expect a temperature of 28°C (82°F).

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Marietta Precipitation page.