Weather & Climate in Marietta, GA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Marietta enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winters average 43°F in January while summers reach 76°F in July. The area gets 304 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 56.2 inches (wetter than the 38-inch national average). The area receives 1.2 inches of snow annually. Air quality is rated Good with a median AQI of 44. The city sits at an elevation of 1,089 feet.

Temperature

43°F Jan (6°C) 76°F Jul (25°C)

Annual Average	60.1°F
	11% above US avg
January Average	43°F (6°C)
July Average	76°F (25°C)
Sunny Days	304 days/yr

Geography

Elevation	1,089 ft (332 m)
Area	23.2 sq mi (60.0 km²)
Population Density	2,597/sq mi
Coordinates	33.9536°N, 84.5425°W
Timezone	America/New_York
County	Cobb County County
Nearest Airport	Hartsfield - Jackson Atlanta International (ATL) 23 miles away

Precipitation & Snow

Annual Rainfall 56.2"

48% above US avg

Snowfall 1.2"

Wettest Month (Mar) 5.75"

Driest Month (Oct) 3.19"

Air Quality

AQI Median	44.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	94.4 / 100
Social Vulnerability	11.4 / 100
Community Resilience	28.7 / 100

Hazard Breakdown

Tornado	Relatively High
Hurricane	Relatively Low
Earthquake	Relatively Moderate
Wildfire	Very Low
Flood	Relatively High
Hail	Relatively High
Strong Wind	Relatively Moderate
Heat Wave	Relatively Moderate
Winter Weather	Relatively Moderate
Lightning	Very High
Ice Storm	Relatively High
Drought	No Rating
Cold Wave	Relatively High
Landslide	Relatively Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

64 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.

Apr 29, 2003	8 km S of Valley Head, Alabama	M4.6	117 km	20 km
Jul 19, 1997	12 km E of Cohutta, Georgia	M3.5	114 km	3 km
Mar 21, 2001	7 km ESE of Trenton, Georgia	M3.2	129 km	0 km
May 6, 2010	11 km ENE of Whitesboro, Alabama	M3.2	132 km	5 km
Apr 5, 1994	10 km N of Trenton, Georgia	M3.2	143 km	24 km
Aug 1, 2009	8 km ENE of Ducktown, Tennessee	M3.2	126 km	5 km
Jan 15, 1993	1 km N of Apison, Tennessee	M3.1	129 km	8 km
Apr 4, 2009	15 km N of Milledgeville, Georgia	M3.1	149 km	0 km
Apr 29, 2003	7 km E of Fort Payne, Alabama	M3.1	115 km	3 km
Jun 23, 2008	10 km ESE of Cohutta, Georgia	M3.1	111 km	9 km
May 2, 2003	8 km S of Valley Head, Alabama	M3.1	115 km	15 km
Oct 30, 1991	9 km NNE of Eton, Georgia	M3.1	107 km	8 km
Nov 1, 2009	1 km ESE of South Cleveland, Tennessee	M3.0	135 km	25 km
Jan 21, 2022	16 km NNE of Eton, Georgia	M2.9	114 km	15 km
May 19, 1997	9 km NNW of Trion, Georgia	M2.9	105 km	3 km
Aug 7, 2006	8 km NNE of Trenton, Georgia	M2.9	138 km	14 km
Sep 19, 1990	6 km NNW of Menlo, Georgia	M2.9	109 km	6 km
Jul 28, 1990	3 km WNW of Varnell, Georgia	M2.9	116 km	14 km
Feb 17, 1991	6 km N of Goldville, Alabama	M2.9	146 km	1 km
Jan 19, 1990	4 km E of Cohutta, Georgia	M2.8	116 km	11 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Hurricane History

3 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.

Year	Name	Category	Max Wind	Closest
2018	Michael	Category 1	92 mph	215 km
1995	Opal	Category 1	—	275 km
1985	Kate	Category 1	75 mph	290 km

Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

490 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 82 fatalities, 1,515 injuries.

Date	Rating	Distance	Path	Fatalities
Mar 25, 2021	EF4	98 km	38.6 mi	0
Mar 27, 1994	EF4	49 km	49.0 mi	3
Nov 22, 1992	EF4	12 km	20.0 mi	0
Apr 3, 1974	EF4	50 km	17.7 mi	6
Apr 3, 1974	EF4	77 km	29.5 mi	9
Jan 12, 2023	EF3	88 km	31.2 mi	0
Jan 30, 2013	EF3	57 km	21.8 mi	1
Mar 2, 2012	EF3	70 km	29.0 mi	0
Dec 22, 2011	EF3	64 km	11.4 mi	0
Apr 27, 2011	EF3	97 km	37.0 mi	1
Apr 27, 2011	EF3	88 km	21.7 mi	2
Apr 27, 2011	EF3	46 km	23.1 mi	0
Mar 15, 2008	EF3	55 km	16.9 mi	2
Feb 26, 2008	EF3	82 km	7.2 mi	0
Jan 2, 2006	EF3	90 km	3.0 mi	0
Mar 20, 1998	EF3	76 km	4.0 mi	12
Mar 27, 1994	EF3	68 km	44.0 mi	3
Mar 27, 1994	EF3	74 km	21.0 mi	0
Mar 27, 1994	EF3	83 km	23.0 mi	3
Mar 27, 1994	EF3	54 km	40.0 mi	9

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (7,740 acres, 2014).

Year	Name	Acres Burned	Distance
2014	UNNAMED	7,740	98 km
2013	UNNAMED	6,320	96 km
2016	UNNAMED	5,844	91 km
2014	HOUCK CREEK	3,857	98 km
2022	SC 540C/CHOCCOLOCCO	3,750	94 km
2020	SC WEST END C AND D	3,538	99 km
2010	UPPER SHOAL	3,512	93 km
2008	UNNAMED	3,410	98 km
2014	UNNAMED	3,298	83 km
2018	HOUCK CREEK	3,188	99 km
2019	540C	2,622	95 km
2013	UNNAMED	2,611	90 km
2021	SC LOWER SHOALS A	2,444	95 km
2021	SC UPPER SHOAL A AND D	2,348	93 km
2018	RUFF CREEK	2,281	93 km
2015	540C	2,243	95 km
2021	UNNAMED	2,199	88 km
2018	UNNAMED	2,166	97 km
2016	UNNAMED	1,886	99 km
2016	UNNAMED	1,866	88 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	43°F (6°C)	5.0 in	Coldest
February	45°F (7°C)	4.8 in
March	53°F (12°C)	5.8 in	Wettest
April	60°F (16°C)	4.7 in
May	68°F (20°C)	4.3 in
June	75°F (24°C)	3.9 in
July	76°F (25°C)	5.0 in
August	78°F (25°C)	3.7 in	Warmest
September	72°F (22°C)	3.5 in
October	61°F (16°C)	3.2 in	Driest
November	52°F (11°C)	3.5 in
December	44°F (7°C)	4.7 in

Marietta has a seasonal temperature swing of 35°F / from 43°F in January to 78°F in August. Total annual precipitation is 51.9 inches, with March being the wettest month (5.8") and October the driest (3.2").

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