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Weather & Climate in Gillisonville, SC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Gillisonville enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 51°F in January while summers reach 82°F in July. The area gets 308 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 45.3 inches. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 71 feet.
Temperature
51°F Jan (10°C)
82°F Jul (28°C)
| Annual Average | 66.9°F |
| 24% above US avg | |
| January Average | 51°F (10°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 308 days/yr |
Geography
| Elevation | 71 ft (22 m) |
| Area | 1.2 sq mi (3.1 km²) |
| Population Density | 269/sq mi |
| Coordinates | 32.6116°N, 81.0002°W |
| Timezone | America/New_York |
| County | Jasper County County |
| Nearest Airport | Lowcountry Regional (RBW) 30 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 78.6 / 100 |
| Social Vulnerability | 76.8 / 100 |
| Community Resilience | 21.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively High |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
40 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.
| Aug 21, 1992 | 1 km SSE of Centerville, South Carolina | M4.1 | 89 km | 7 km |
| Jun 18, 2022 | 7 km E of Stillmore, Georgia | M3.9 | 108 km | 1 km |
| Apr 17, 1995 | 0 km NNW of Centerville, South Carolina | M3.9 | 89 km | 8 km |
| Jul 13, 2003 | 6 km N of Cobbtown, Georgia | M3.6 | 112 km | 5 km |
| Nov 13, 1990 | 4 km SSW of Ladson, South Carolina | M3.5 | 89 km | 3 km |
| Nov 8, 2002 | 24 km SSE of Kiawah Island, South Carolina | M3.5 | 101 km | 4 km |
| Jun 20, 2017 | 6 km SW of Augusta, Georgia | M3.2 | 131 km | 13 km |
| Aug 8, 1993 | 12 km ENE of Aiken, South Carolina | M3.2 | 123 km | 9 km |
| Aug 29, 2009 | 2 km NE of Summerville, South Carolina | M3.2 | 92 km | 5 km |
| Jul 20, 2004 | 7 km WSW of Centerville, South Carolina | M3.1 | 81 km | 10 km |
| May 5, 2003 | 4 km NNW of Summerville, South Carolina | M3.1 | 90 km | 11 km |
| Mar 29, 1999 | 3 km NNW of Sangaree, South Carolina | M3.0 | 95 km | 11 km |
| Jul 26, 2002 | 4 km NNW of Summerville, South Carolina | M3.0 | 90 km | 10 km |
| Mar 19, 2014 | 0 km WNW of Centerville, South Carolina | M3.0 | 88 km | 7 km |
| Mar 2, 2003 | 7 km S of Centerville, South Carolina | M2.9 | 86 km | 7 km |
| Feb 7, 1990 | 9 km S of Centerville, South Carolina | M2.9 | 85 km | 9 km |
| Jul 7, 2002 | 1 km NW of Sangaree, South Carolina | M2.9 | 94 km | 11 km |
| Jul 16, 2002 | 5 km SSW of Ladson, South Carolina | M2.8 | 88 km | 7 km |
| Jul 31, 2012 | 5 km S of Centerville, South Carolina | M2.8 | 87 km | 8 km |
| May 12, 2010 | 6 km SSW of Ladson, South Carolina | M2.8 | 88 km | 1 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 |
| 2024 | Helene | Category 4 | 138 mph | 261 km |
| 2023 | Idalia | Category 3 | 115 mph | 255 km |
| 2022 | Ian | Category 1 | 86 mph | 178 km |
| 2020 | Isaias | Category 1 | 92 mph | 162 km |
| 2019 | Dorian | Category 3 | 115 mph | 176 km |
| 2018 | Michael | Category 1 | — | 278 km |
| 2018 | Florence | Category 1 | 92 mph | 287 km |
| 2016 | Matthew | Category 3 | 109 mph | 74 km |
| 2014 | Arthur | Category 2 | 92 mph | 226 km |
| 2005 | Ophelia | Category 1 | 81 mph | 272 km |
| 2004 | Charley | Category 1 | 86 mph | 127 km |
| 2004 | Gaston | Category 1 | 75 mph | 138 km |
| 2004 | Alex | Category 1 | — | 300 km |
| 1999 | Floyd | Category 2 | 109 mph | 223 km |
| 1999 | Dennis | Category 2 | 104 mph | 284 km |
| 1999 | Irene | Category 1 | 81 mph | 174 km |
| 1998 | Bonnie | Category 3 | 115 mph | 300 km |
| 1996 | Fran | Category 3 | 115 mph | 282 km |
| 1996 | Bertha | Category 2 | 104 mph | 248 km |
| 1989 | Hugo | Category 4 | 138 mph | 114 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
360 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 14 fatalities, 279 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 5, 2022 | EF4 | 82 km | 14.4 mi | 1 |
| Apr 13, 2020 | EF4 | 29 km | 23.7 mi | 5 |
| Apr 5, 2022 | EF3 | 58 km | 34.5 mi | 0 |
| Apr 5, 2022 | EF3 | 50 km | 13.3 mi | 0 |
| Apr 13, 2020 | EF3 | 71 km | 5.4 mi | 0 |
| Apr 13, 2020 | EF3 | 83 km | 1.4 mi | 0 |
| Apr 13, 2020 | EF3 | 99 km | 37.9 mi | 0 |
| Apr 13, 2020 | EF3 | 87 km | 35.7 mi | 2 |
| Apr 13, 2020 | EF3 | 90 km | 8.5 mi | 0 |
| Mar 15, 2008 | EF3 | 71 km | 10.1 mi | 0 |
| Apr 9, 1998 | EF3 | 73 km | 8.0 mi | 2 |
| Apr 23, 1983 | EF3 | 75 km | 33.0 mi | 0 |
| Jan 9, 2024 | EF2 | 74 km | 2.1 mi | 0 |
| Apr 13, 2020 | EF2 | 63 km | 1.2 mi | 0 |
| Apr 13, 2020 | EF2 | 90 km | 10.2 mi | 0 |
| Apr 19, 2019 | EF2 | 74 km | 10.6 mi | 0 |
| May 23, 2017 | EF2 | 70 km | 7.5 mi | 0 |
| Feb 9, 2017 | EF2 | 61 km | 9.8 mi | 0 |
| Jan 21, 2017 | EF2 | 85 km | 13.8 mi | 0 |
| Sep 24, 2015 | EF2 | 89 km | 6.9 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1886 | CHARLESTON, SC | Earthquake | — | — | 99 km |
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (12,186 acres, 2008).
| Year | Name | Acres Burned | Distance |
| 2008 | UNNAMED | 12,186 | 90 km |
| 2007 | UNNAMED | 10,963 | 86 km |
| 2008 | UNNAMED | 10,163 | 86 km |
| 2009 | UNNAMED | 8,427 | 96 km |
| 2008 | UNNAMED | 4,291 | 93 km |
| 2010 | UNNAMED | 4,269 | 16 km |
| 2008 | UNNAMED | 4,021 | 83 km |
| 2010 | UNNAMED | 3,746 | 20 km |
| 2010 | UNNAMED | 3,521 | 31 km |
| 1994 | UNNAMED | 3,469 | 15 km |
| 2010 | UNNAMED | 2,990 | 17 km |
| 2010 | UNNAMED | 2,968 | 99 km |
| 2009 | UNNAMED | 2,906 | 84 km |
| 2004 | UNNAMED | 2,880 | 31 km |
| 2008 | UNNAMED | 2,845 | 75 km |
| 2010 | UNNAMED | 2,796 | 81 km |
| 2008 | UNNAMED | 2,768 | 89 km |
| 2008 | UNNAMED | 2,748 | 77 km |
| 2008 | UNNAMED | 2,711 | 81 km |
| 2004 | UNNAMED | 2,661 | 41 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 51°F (10°C) | 4.1 in | Coldest |
| February | 51°F (10°C) | 3.5 in | |
| March | 58°F (14°C) | 4.2 in | |
| April | 64°F (18°C) | 3.1 in | |
| May | 72°F (22°C) | 3.9 in | |
| June | 78°F (25°C) | 5.6 in | |
| July | 82°F (28°C) | 5.7 in | Warmest |
| August | 80°F (27°C) | 6.5 in | Wettest |
| September | 75°F (24°C) | 4.6 in | |
| October | 66°F (19°C) | 2.7 in | |
| November | 57°F (14°C) | 2.4 in | Driest |
| December | 51°F (10°C) | 3.3 in |
Gillisonville has a seasonal temperature swing of 32°F / from 51°F in January to 82°F in July. Total annual precipitation is 49.6 inches, with August being the wettest month (6.5") and November the driest (2.4").