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Weather & Climate in St. Simons, GA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Simons enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 53°F in January while summers reach 84°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 45.4 inches. Air quality is rated Good with a median AQI of 44. The city sits at an elevation of 5 feet.
Temperature
53°F Jan (12°C)
84°F Jul (29°C)
| Annual Average | 69.2°F |
| 28% above US avg | |
| January Average | 53°F (12°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 301 days/yr |
Geography
| Elevation | 5 ft (2 m) |
| Area | 17.1 sq mi (44.3 km²) |
| Population Density | 974/sq mi |
| Coordinates | 31.1801°N, 81.3854°W |
| Timezone | America/New_York |
| County | Glynn County County |
| Nearest Airport | Jacksonville International (JAX) 51 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 83.7 / 100 |
| Social Vulnerability | 77.0 / 100 |
| Community Resilience | 93.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively High |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Jul 13, 2003 | 6 km N of Cobbtown, Georgia | M3.6 | 147 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
20 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 | 183 km |
| 2024 | Debby | Category 1 | 81 mph | 240 km |
| 2023 | Idalia | Category 4 | 132 mph | 138 km |
| 2022 | Ian | Category 1 | 86 mph | 229 km |
| 2020 | Isaias | Category 1 | 92 mph | 160 km |
| 2019 | Dorian | Category 3 | 115 mph | 162 km |
| 2018 | Michael | Category 1 | 92 mph | 259 km |
| 2016 | Matthew | Category 3 | 121 mph | 75 km |
| 2016 | Hermine | Category 1 | 81 mph | 268 km |
| 2014 | Arthur | Category 1 | 92 mph | 220 km |
| 2004 | Gaston | Category 1 | 75 mph | 253 km |
| 2004 | Charley | Category 1 | 86 mph | 113 km |
| 1999 | Floyd | Category 3 | 115 mph | 227 km |
| 1999 | Dennis | Category 2 | 104 mph | 288 km |
| 1999 | Irene | Category 1 | 81 mph | 160 km |
| 1996 | Bertha | Category 2 | 98 mph | 265 km |
| 1989 | Hugo | Category 4 | 138 mph | 231 km |
| 1985 | Kate | Category 1 | 75 mph | 204 km |
| 1985 | Bob | Category 1 | 75 mph | 87 km |
| 1984 | Diana | Category 3 | 115 mph | 152 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
223 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 6 fatalities, 173 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 11, 2008 | EF4 | 27 km | 11.0 mi | 0 |
| Dec 2, 2018 | EF3 | 47 km | 7.1 mi | 0 |
| Nov 18, 1968 | EF3 | 87 km | 0.5 mi | 0 |
| Mar 9, 2024 | EF2 | 55 km | 4.7 mi | 0 |
| May 23, 2017 | EF2 | 97 km | 7.5 mi | 0 |
| Dec 2, 2009 | EF2 | 89 km | 5.1 mi | 0 |
| Oct 27, 2009 | EF2 | 97 km | 0.8 mi | 0 |
| Mar 22, 2005 | EF2 | 69 km | 2.0 mi | 0 |
| Aug 12, 2004 | EF2 | 88 km | 7.0 mi | 0 |
| Apr 9, 1998 | EF2 | 81 km | 24.5 mi | 4 |
| Oct 2, 1994 | EF2 | 53 km | 0.2 mi | 0 |
| Feb 27, 1984 | EF2 | 42 km | 3.0 mi | 0 |
| Mar 16, 1976 | EF2 | 88 km | 0.3 mi | 0 |
| May 12, 1974 | EF2 | 78 km | 0.6 mi | 0 |
| May 12, 1974 | EF2 | 98 km | 9.4 mi | 2 |
| Nov 9, 1973 | EF2 | 96 km | 1.0 mi | 0 |
| Jan 15, 1971 | EF2 | 72 km | 0.5 mi | 0 |
| Jan 15, 1971 | EF2 | 98 km | 1.0 mi | 0 |
| Jun 6, 1964 | EF2 | 92 km | 3.6 mi | 0 |
| Feb 24, 1963 | EF2 | 3 km | 1.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: BIG TURNAROUND COMPLEX (FLOYDS ISLAND PRAIRIE) (215,381 acres, 2007).
| Year | Name | Acres Burned | Distance |
| 2007 | BIG TURNAROUND COMPLEX (FLOYDS ISLAND PRAIRIE) | 215,381 | 92 km |
| 2011 | CRAVENS HAMMOCK | 142,688 | 99 km |
| 2007 | SWEAT FARM ROAD | 52,495 | 99 km |
| 2011 | GA-19 (SAW FLY RD) | 19,730 | 77 km |
| 2011 | DURDIN PRAIRIE | 19,487 | 84 km |
| 1999 | HICKORY IS | 14,656 | 98 km |
| 2008 | UNNAMED | 12,186 | 97 km |
| 2007 | UNNAMED | 10,963 | 94 km |
| 2008 | UNNAMED | 10,163 | 92 km |
| 2011 | RACEPOND | 7,951 | 79 km |
| 2000 | GA-2 | 7,319 | 88 km |
| 2001 | CRAVENS IS | 6,412 | 97 km |
| 2002 | NO.1WILD | 5,355 | 94 km |
| 1998 | HONEYSCRUB | 4,678 | 100 km |
| 2008 | UNNAMED | 4,021 | 98 km |
| 2011 | ELIM CHURCH RD. FIRE | 3,850 | 67 km |
| 2001 | UNNAMED | 3,827 | 29 km |
| 1990 | MOTHERS DAY | 3,761 | 96 km |
| 2008 | UNNAMED | 2,845 | 92 km |
| 2008 | UNNAMED | 2,768 | 83 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 53°F (12°C) | 3.9 in | Coldest |
| February | 54°F (12°C) | 3.7 in | |
| March | 61°F (16°C) | 4.1 in | |
| April | 66°F (19°C) | 2.7 in | |
| May | 74°F (23°C) | 3.2 in | |
| June | 79°F (26°C) | 5.4 in | |
| July | 84°F (29°C) | 5.6 in | Warmest |
| August | 81°F (27°C) | 6.9 in | Wettest |
| September | 78°F (25°C) | 6.5 in | |
| October | 69°F (21°C) | 3.4 in | |
| November | 61°F (16°C) | 2.5 in | Driest |
| December | 54°F (12°C) | 3.0 in |
St. Simons has a seasonal temperature swing of 31°F / from 53°F in January to 84°F in July. Total annual precipitation is 50.8 inches, with August being the wettest month (6.9") and November the driest (2.5").