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Weather & Climate in Marietta, NC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Marietta enjoys a temperate climate with an average annual temperature of 62°F (16°C). Winters average 43°F in January while summers reach 79°F in July. The area gets 301 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 51.4 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 90 feet.
Temperature
43°F Jan (6°C)
79°F Jul (26°C)
| Annual Average | 61.6°F |
| 14% above US avg | |
| January Average | 43°F (6°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 301 days/yr |
Geography
| Elevation | 90 ft (27 m) |
| Area | 1.1 sq mi (2.9 km²) |
| Population Density | 116/sq mi |
| Coordinates | 34.3682°N, 79.1249°W |
| Timezone | America/New_York |
| County | Dillon County County |
| Nearest Airport | Lumberton Regional (LBT) 17 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 84.3 / 100 |
| Social Vulnerability | 87.6 / 100 |
| Community Resilience | 25.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | No Rating |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
15 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Apr 13, 1998 | 9 km S of Kershaw, South Carolina | M3.9 | 136 km | 7 km |
| Jun 29, 2022 | 6 km E of Elgin, South Carolina | M3.6 | 149 km | 3 km |
| Jun 29, 2022 | 6 km E of Elgin, South Carolina | M3.5 | 149 km | 3 km |
| Jun 26, 2022 | 6 km E of Elgin, South Carolina | M3.4 | 149 km | 4 km |
| May 9, 2022 | 5 km ESE of Elgin, South Carolina | M3.3 | 149 km | 4 km |
| Jan 29, 1994 | 12 km NNE of Alcolu, South Carolina | M2.9 | 110 km | 2 km |
| Mar 21, 2011 | 9 km S of Cordova, North Carolina | M2.9 | 82 km | 8 km |
| May 10, 2022 | 5 km E of Elgin, South Carolina | M2.8 | 149 km | 2 km |
| Mar 9, 2024 | 5 km E of Elgin, South Carolina | M2.7 | 149 km | 3 km |
| Jan 5, 2022 | 5 km SW of Lugoff, South Carolina | M2.6 | 149 km | 0 km |
| Apr 26, 2025 | 6 km E of Elgin, South Carolina | M2.6 | 149 km | 2 km |
| May 10, 2022 | 6 km E of Elgin, South Carolina | M2.6 | 148 km | 2 km |
| Jan 3, 2022 | 5 km S of Lugoff, South Carolina | M2.5 | 146 km | 2 km |
| Sep 15, 2024 | 6 km E of Elgin, South Carolina | M2.5 | 149 km | 2 km |
| Jul 29, 2012 | 7 km NNW of Wallace, South Carolina | M2.5 | 82 km | 14 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
23 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2022 | Ian | Category 1 | 81 mph | 119 km |
| 2020 | Isaias | Category 1 | 92 mph | 78 km |
| 2019 | Dorian | Category 3 | 115 mph | 156 km |
| 2018 | Florence | Category 2 | 104 mph | 78 km |
| 2016 | Matthew | Category 2 | 98 mph | 97 km |
| 2014 | Arthur | Category 2 | 98 mph | 156 km |
| 2011 | Irene | Category 1 | 86 mph | 225 km |
| 2005 | Ophelia | Category 1 | 86 mph | 158 km |
| 2004 | Alex | Category 2 | 98 mph | 221 km |
| 2004 | Gaston | Category 1 | 75 mph | 158 km |
| 2004 | Charley | Category 1 | 81 mph | 74 km |
| 2003 | Isabel | Category 2 | 104 mph | 250 km |
| 1999 | Irene | Category 2 | 92 mph | 190 km |
| 1999 | Floyd | Category 2 | 104 mph | 121 km |
| 1999 | Dennis | Category 2 | 104 mph | 224 km |
| 1998 | Bonnie | Category 3 | 115 mph | 131 km |
| 1996 | Fran | Category 3 | 115 mph | 89 km |
| 1996 | Bertha | Category 2 | 104 mph | 122 km |
| 1989 | Hugo | Category 4 | 138 mph | 145 km |
| 1986 | Charley | Category 1 | 75 mph | 232 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
390 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 58 fatalities, 1,381 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Nov 7, 1995 | EF4 | 33 km | 0.7 mi | 0 |
| Mar 28, 1984 | EF4 | 65 km | 17.0 mi | 7 |
| Mar 28, 1984 | EF4 | 52 km | 40.0 mi | 4 |
| Mar 28, 1984 | EF4 | 77 km | 7.0 mi | 0 |
| Apr 8, 1957 | EF4 | 35 km | 0.8 mi | 0 |
| Feb 15, 2021 | EF3 | 76 km | 21.9 mi | 3 |
| Apr 16, 2011 | EF3 | 72 km | 52.9 mi | 2 |
| Nov 16, 2006 | EF3 | 81 km | 2.2 mi | 8 |
| Mar 28, 1984 | EF3 | 56 km | 40.0 mi | 12 |
| May 20, 1980 | EF3 | 39 km | 10.7 mi | 0 |
| Feb 22, 1971 | EF3 | 81 km | 85.7 mi | 2 |
| Apr 18, 1969 | EF3 | 92 km | 77.3 mi | 0 |
| Apr 18, 1969 | EF3 | 86 km | 25.8 mi | 0 |
| Nov 24, 1967 | EF3 | 50 km | 3.3 mi | 0 |
| Aug 17, 1965 | EF3 | 73 km | 0.3 mi | 0 |
| Aug 29, 1964 | EF3 | 56 km | 21.9 mi | 0 |
| Oct 9, 1950 | EF3 | 53 km | 2.0 mi | 0 |
| Aug 7, 2024 | EF2 | 96 km | 4.7 mi | 0 |
| Apr 13, 2020 | EF2 | 98 km | 4.6 mi | 0 |
| Apr 13, 2020 | EF2 | 97 km | 0.2 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: HIGHWAY 31 (17,004 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | HIGHWAY 31 | 17,004 | 67 km |
| 1991 | UNNAMED | 3,968 | 73 km |
| 1997 | UNNAMED | 3,111 | 85 km |
| 1985 | UNNAMED | 2,743 | 76 km |
| 1986 | UNNAMED | 2,642 | 75 km |
| 2001 | UNNAMED | 2,204 | 68 km |
| 2007 | LONGBRANCH-ROBESON COMPLEX | 1,944 | 20 km |
| 1994 | CM 15 16 17 | 1,871 | 98 km |
| 2009 | UNNAMED | 1,870 | 87 km |
| 2021 | SLATES CHURCH FIRE | 1,824 | 74 km |
| 2016 | COUNTY LINE ROAD FIRE | 1,704 | 80 km |
| 2010 | UNNAMED | 1,683 | 89 km |
| 2002 | LEGENDS | 1,666 | 71 km |
| 2016 | CLEMMONS ROAD | 1,468 | 97 km |
| 2006 | OVERHILLS | 1,436 | 96 km |
| 1990 | UNNAMED | 1,335 | 70 km |
| 2009 | UNNAMED | 1,319 | 89 km |
| 2010 | CHUCKS FIRST BIG ONE | 1,252 | 75 km |
| 1999 | UNNAMED | 1,237 | 99 km |
| 2018 | STRAUSBURG ROAD | 1,219 | 75 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 3.9 in | Coldest |
| February | 46°F (8°C) | 3.6 in | |
| March | 54°F (12°C) | 4.4 in | |
| April | 61°F (16°C) | 2.9 in | |
| May | 69°F (21°C) | 4.0 in | |
| June | 76°F (25°C) | 4.8 in | |
| July | 79°F (26°C) | 5.8 in | Warmest, Wettest |
| August | 79°F (26°C) | 5.3 in | |
| September | 74°F (23°C) | 4.1 in | |
| October | 63°F (17°C) | 3.0 in | |
| November | 55°F (13°C) | 2.8 in | Driest |
| December | 47°F (8°C) | 3.2 in |
Marietta has a seasonal temperature swing of 36°F / from 43°F in January to 79°F in July. Total annual precipitation is 47.9 inches, with July being the wettest month (5.8") and November the driest (2.8").