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Weather & Climate in Allendale, SC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Allendale enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 46°F in January while summers reach 81°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 48.8 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 189 feet.
Temperature
46°F Jan (8°C)
81°F Jul (27°C)
| Annual Average | 63.4°F |
| 17% above US avg | |
| January Average | 46°F (8°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 308 days/yr |
Geography
| Elevation | 189 ft (58 m) |
| Area | 3.3 sq mi (8.6 km²) |
| Population Density | 784/sq mi |
| Coordinates | 33.0080°N, 81.3092°W |
| Timezone | America/New_York |
| County | Barnwell County County |
| Nearest Airport | Barnwell Regional (BNL) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 45.8 / 100 |
| Social Vulnerability | 98.9 / 100 |
| Community Resilience | 19.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively 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 |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
69 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 | 107 km | 7 km |
| Feb 15, 2014 | 12 km ENE of Parksville, South Carolina | M4.1 | 116 km | 5 km |
| Apr 17, 1995 | 0 km NNW of Centerville, South Carolina | M3.9 | 106 km | 8 km |
| Jun 18, 2022 | 7 km E of Stillmore, Georgia | M3.9 | 99 km | 1 km |
| Jun 29, 2022 | 6 km E of Elgin, South Carolina | M3.6 | 140 km | 3 km |
| Jul 13, 2003 | 6 km N of Cobbtown, Georgia | M3.6 | 108 km | 5 km |
| Nov 13, 1990 | 4 km SSW of Ladson, South Carolina | M3.5 | 110 km | 3 km |
| Jun 29, 2022 | 6 km E of Elgin, South Carolina | M3.5 | 140 km | 3 km |
| Nov 8, 2002 | 24 km SSE of Kiawah Island, South Carolina | M3.5 | 143 km | 4 km |
| Jan 3, 1992 | 4 km ENE of Willington, South Carolina | M3.4 | 149 km | 3 km |
| Jun 26, 2022 | 6 km E of Elgin, South Carolina | M3.4 | 140 km | 4 km |
| May 9, 2022 | 5 km ESE of Elgin, South Carolina | M3.3 | 139 km | 4 km |
| Aug 8, 1993 | 12 km ENE of Aiken, South Carolina | M3.2 | 71 km | 9 km |
| Jun 20, 2017 | 6 km SW of Augusta, Georgia | M3.2 | 81 km | 13 km |
| Aug 29, 2009 | 2 km NE of Summerville, South Carolina | M3.2 | 107 km | 5 km |
| May 5, 2003 | 4 km NNW of Summerville, South Carolina | M3.1 | 105 km | 11 km |
| Jul 20, 2004 | 7 km WSW of Centerville, South Carolina | M3.1 | 99 km | 10 km |
| Mar 19, 2014 | 0 km WNW of Centerville, South Carolina | M3.0 | 106 km | 7 km |
| Feb 16, 2014 | 13 km WNW of Edgefield, South Carolina | M3.0 | 115 km | 7 km |
| Jul 26, 2002 | 4 km NNW of Summerville, South Carolina | M3.0 | 104 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
18 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Helene | Category 2 | 109 mph | 267 km |
| 2023 | Idalia | Category 1 | — | 273 km |
| 2022 | Ian | Category 1 | 86 mph | 199 km |
| 2020 | Isaias | Category 1 | 92 mph | 208 km |
| 2019 | Dorian | Category 3 | 115 mph | 218 km |
| 2018 | Michael | Category 1 | 92 mph | 263 km |
| 2018 | Florence | Category 1 | 75 mph | 291 km |
| 2016 | Matthew | Category 2 | 109 mph | 126 km |
| 2014 | Arthur | Category 1 | 92 mph | 266 km |
| 2004 | Gaston | Category 1 | 75 mph | 159 km |
| 2004 | Charley | Category 1 | 81 mph | 170 km |
| 1999 | Floyd | Category 2 | 109 mph | 265 km |
| 1999 | Irene | Category 1 | 81 mph | 224 km |
| 1996 | Bertha | Category 2 | 104 mph | 282 km |
| 1989 | Hugo | Category 4 | 138 mph | 109 km |
| 1985 | Kate | Category 1 | 75 mph | 266 km |
| 1985 | Bob | Category 1 | 75 mph | 118 km |
| 1984 | Diana | Category 3 | 115 mph | 276 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
398 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 16 fatalities, 301 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 13, 2020 | EF4 | 34 km | 23.7 mi | 5 |
| Apr 5, 2022 | EF3 | 11 km | 13.3 mi | 0 |
| Apr 5, 2022 | EF3 | 13 km | 34.5 mi | 0 |
| Apr 13, 2020 | EF3 | 47 km | 37.9 mi | 0 |
| Apr 13, 2020 | EF3 | 22 km | 5.4 mi | 0 |
| Apr 13, 2020 | EF3 | 35 km | 35.7 mi | 2 |
| Apr 13, 2020 | EF3 | 35 km | 1.4 mi | 0 |
| Apr 13, 2020 | EF3 | 37 km | 8.5 mi | 0 |
| Apr 10, 2009 | EF3 | 67 km | 14.6 mi | 0 |
| Apr 10, 2009 | EF3 | 83 km | 26.3 mi | 0 |
| Mar 15, 2008 | EF3 | 49 km | 10.1 mi | 0 |
| Dec 10, 2004 | EF3 | 77 km | 1.5 mi | 0 |
| Apr 9, 1998 | EF3 | 97 km | 8.0 mi | 2 |
| Nov 2, 1995 | EF3 | 92 km | 1.5 mi | 0 |
| Apr 23, 1983 | EF3 | 22 km | 33.0 mi | 0 |
| Jan 9, 2024 | EF2 | 39 km | 2.1 mi | 0 |
| Apr 5, 2022 | EF2 | 89 km | 5.7 mi | 0 |
| Apr 13, 2020 | EF2 | 83 km | 16.5 mi | 0 |
| Apr 13, 2020 | EF2 | 66 km | 10.2 mi | 0 |
| Apr 19, 2019 | EF2 | 48 km | 10.6 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 | — | — | 123 km |
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (8,427 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | UNNAMED | 8,427 | 43 km |
| 2010 | UNNAMED | 4,269 | 68 km |
| 2010 | UNNAMED | 3,746 | 73 km |
| 2010 | UNNAMED | 3,521 | 77 km |
| 1994 | UNNAMED | 3,469 | 60 km |
| 2010 | UNNAMED | 2,990 | 60 km |
| 2010 | UNNAMED | 2,968 | 46 km |
| 2004 | UNNAMED | 2,880 | 78 km |
| 2010 | UNNAMED | 2,796 | 29 km |
| 2008 | UNNAMED | 2,711 | 28 km |
| 2004 | UNNAMED | 2,661 | 83 km |
| 2004 | UNNAMED | 2,553 | 60 km |
| 1994 | UNNAMED | 2,549 | 77 km |
| 2004 | UNNAMED | 2,547 | 62 km |
| 2004 | UNNAMED | 2,446 | 79 km |
| 2008 | UNNAMED | 2,407 | 41 km |
| 1985 | UNNAMED | 2,335 | 88 km |
| 2010 | UNNAMED | 2,330 | 35 km |
| 2018 | UNNAMED | 2,262 | 40 km |
| 2009 | UNNAMED | 2,228 | 29 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 46°F (8°C) | 4.2 in | Coldest |
| February | 50°F (10°C) | 3.9 in | |
| March | 57°F (14°C) | 4.4 in | |
| April | 64°F (18°C) | 3.0 in | |
| May | 71°F (22°C) | 4.0 in | |
| June | 78°F (25°C) | 5.4 in | |
| July | 81°F (27°C) | 5.1 in | Warmest |
| August | 80°F (26°C) | 5.6 in | Wettest |
| September | 75°F (24°C) | 3.7 in | |
| October | 65°F (18°C) | 2.7 in | |
| November | 56°F (14°C) | 2.5 in | Driest |
| December | 49°F (10°C) | 3.4 in |
Allendale has a seasonal temperature swing of 35°F / from 46°F in January to 81°F in July. Total annual precipitation is 47.9 inches, with August being the wettest month (5.6") and November the driest (2.5").