Marietta, GA weather and climate in 2025
Day
32 °C
Night
20 °C
Sea
0 °C
Precipitation
126 mm
in month
Rainy days
12 days
in month
Daylight
14 hours
average
Sunshine
9 hours
average
Humidity
75 %
Day
32 °C
Night
20 °C
Sea
0 °C
Precipitation
126 mm
in month
Rainy days
12 days
in month
Daylight
14 hours
average
Sunshine
9 hours
average
Humidity
75 %
Overview: Marietta, GA
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Weather overview for Marietta, GA
Weather overview
Marietta, GA, USA experiences a humid subtropical climate. Throughout the year, temperatures can swing from a chilly 0 °C (32 °F) in January nights to a toasty 32 °C (89 °F) during July days. On average, Marietta sees its wettest months in the first half of the year, with peak precipitation hitting in February at 123 mm (4.84 in). There is no distinctive dry or wet season, but summer months do tend to be slightly more moist and humid, where the humidity peaks in August at 75 %. Winds are generally calm, with the slightest breeze felt in January at 3 m/s. As the city features no coastline, sea temperatures are not a concern here.
January weather
January in Marietta, GA greets residents with a wintery chill, boasting an average low night temperature of 0 °C (32 °F). Despite the cold snap, precipitation is noticeable with an average of 112 mm (4.40 in) falling throughout 11 days. Daytime temperatures reach a more comfortable 11 °C (52 °F), but you'll want to layer up to face the cold.
February weather
As we move into February, the cold begins to thaw with the night time lows averaging 2 °C (35 °F). The days get slightly warmer, reaching up to 14 °C (56 °F). February is the wettest month, with about 123 mm (4.84 in) of rain over 10 days, ensuring that the grounds remain soaked and winter coats are still in need.
March weather
The touch of spring can be felt in March with an average overnight low of 5 °C (41 °F) and daytime highs reaching 18 °C (65 °F). The number of rainy days begins to decrease but remain significant at 11 days. Rainfall also stays substantial, casting an average of 123 mm (4.84 in) across the city.
April weather
April in Marietta boasts pleasant temperatures, with nighttime lows at 9 °C (48 °F) and daytime highs soaring to 23 °C (73 °F). The city sees a reduction in rainy days to 9 days, and the rainfall amount also dips to 107 mm (4.20 in). As blooms open up, the winds remain genteel at 3 m/s.
May weather
As May arrives, so does the warmth with average nighttime temperatures at 14 °C (57 °F) and daytime highs elevating to 27 °C (80 °F). The city experiences nearly 10 days of rain, contributing to a verdant spring tapestry. The rain amount is manageable at 99 mm (3.91 in), and with increasing sun hours, May is delightful.
June weather
June marks the beginning of summer with nighttime lows warming up to 18 °C (65 °F) and daytime temperatures reaching a toasty 30 °C (86 °F). With rain occurring over 10 days and winds slowing to a mild 2 m/s, the air feels more static and the humidity starts to make its presence felt with 71 %.
July weather
July in Marietta is peak summer time featuring the warmest nights at an average of 20 °C (68 °F) and the year's highest daytime temperatures at 32 °C (89 °F). The rain frequents slightly more than June with 12 days and rainfall reaching 126 mm (4.95 in). July’s weather calls for air conditioning and the occasional dip in a pool to stay cool.
August weather
As August arrives, the temperatures stay high with an average night low of 20 °C (67 °F) and day highs maintaining at 31 °C (88 °F). The month also experiences an average of 10 days rainy days, although precipitation is slightly lower at 97 mm (3.80 in). Overall, August is still a sultry blend of warmth and sporadic rain showers.
September weather
September signals the start of the fall season, but the remnants of summer heat linger with nighttime still warm at 16 °C (61 °F) and daytime high temperatures averaging 28 °C (82 °F). Rain chances drop to 8 days, and rainfall quantity measures at 93 mm (3.67 in), making it a transitional month.
October weather
October in Marietta showcases a noticeable drop in temperatures with night lows at 10 °C (50 °F) and day highs cooling to 23 °C (73 °F). The days become more crisp and less humid, and with rain over only 7 days, it's one of the dryer months. With a decent number of sun hours at 7 hours, October exudes a comfortable fall air.
November weather
November sees a chill settling in, as night temperatures average out at 5 °C (41 °F) and daytime temperatures reach a modest 18 °C (64 °F). The wind picks up again to 2 m/s, and the city garners an average of 9 days rains, along with a collected 92 mm (3.64 in) of precipitation.
December weather
Concluding the year, December welcomes back the chill with temperatures dipping to an average night low of 1 °C (34 °F) and day highs reaching only 12 °C (54 °F). Rain is present over 10 days, showering the city with 119 mm (4.67 in) of precipitation, and the days grow shorter with diminishing sun hours.
FAQs
How cold does it get at night in Marietta in January?
January nights in Marietta can get quite chilly, with an average low temperature of 0 °C (32 °F). You'll want your warm pajamas and maybe an extra blanket at night.
What is the daytime temperature like in Marietta during February?
In February, Marietta starts to shake off the winter cold a bit, with daytime temperatures averaging a cool 14 °C (56 °F). Light jackets are still a must.
Is March in Marietta warmer than previous months?
Yes, March brings a noticeable warm-up to Marietta with the daytime temperatures climbing to an average high of 18 °C (65 °F). The winter chill is losing its grip.
What's the average April temperature during the day in Marietta?
April offers comfortable daytime temperatures, averaging around 23 °C (73 °F). It's a great time to begin enjoying spring's warmth.
What can I expect from the weather in Marietta in May?
Expect a delightful blend of warm days and mild nights in May, with daytime temps of 27 °C (80 °F). The moderate rainfall does little to dampen the mood.
Is it hot in Marietta during the day in June?
Indeed, June sees the thermostat rising in Marietta with daytime highs of 30 °C (86 °F). It's the perfect weather for shorts and t-shirts.
How should I dress for the heat in Marietta in July?
Lightweight, breathable clothing is your best bet during the sweltering July days when temperatures average 32 °C (89 °F). Don't forget the sunscreen!
What's the typical afternoon temperature in Marietta in August?
August afternoons in Marietta remain hot, with average highs hovering at 31 °C (88 °F). Outdoor activities are still best enjoyed with plenty of hydration and shade.
Is September weather in Marietta still like summer?
September in Marietta often feels like an extension of summer, with warmer days at 28 °C (82 °F). It's less intense, but you'll still want to dress for warmth.
Does it start to cool off in Marietta in October?
Definitely, October brings a refreshing coolness to Marietta with a pleasant daytime average of 23 °C (73 °F), perfect for light sweaters and enjoying the fall colors.
How cold does it get in Marietta in November?
November ushers in cooler weather with nights averaging a cooler 5 °C (41 °F). The arrival of sweater weather is definitely felt during this pre-winter month.
What temperatures can I expect during December in Marietta?
December brings cooler temperatures to Marietta with an average daily high of 12 °C (54 °F) and low nights around 1 °C (34 °F). The month ushers in the festive spirit with a chance for layering winter garments.
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