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Weather & Climate in Suwanee, GA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Suwanee enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winters average 41°F in January while summers reach 78°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 56.4 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 44. The city sits at an elevation of 936 feet.
Temperature
41°F Jan (5°C)
78°F Jul (26°C)
| Annual Average | 60.1°F |
| 11% above US avg | |
| January Average | 41°F (5°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 301 days/yr |
Geography
| Elevation | 936 ft (285 m) |
| Area | 11.0 sq mi (28.4 km²) |
| Population Density | 1,960/sq mi |
| Coordinates | 34.0511°N, 84.0659°W |
| Timezone | America/New_York |
| County | Forsyth County County |
| Nearest Airport | Hartsfield - Jackson Atlanta International (ATL) 35 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 86.1 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 73.2 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
65 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.7.
| Jul 5, 1995 | 12 km ESE of Tellico Plains, Tennessee | M3.7 | 143 km | 10 km |
| Mar 18, 2003 | 11 km S of Rayle, Georgia | M3.5 | 116 km | 5 km |
| Jul 19, 1997 | 12 km E of Cohutta, Georgia | M3.5 | 121 km | 3 km |
| Jan 18, 2000 | 11 km SSE of Gray, Georgia | M3.5 | 138 km | 19 km |
| Aug 1, 2009 | 8 km ENE of Ducktown, Tennessee | M3.2 | 115 km | 5 km |
| Dec 7, 2009 | 4 km WNW of Deepstep, Georgia | M3.2 | 150 km | 7 km |
| Jun 23, 2008 | 10 km ESE of Cohutta, Georgia | M3.1 | 120 km | 9 km |
| Apr 4, 2009 | 15 km N of Milledgeville, Georgia | M3.1 | 123 km | 0 km |
| Oct 30, 1991 | 9 km NNE of Eton, Georgia | M3.1 | 112 km | 8 km |
| Jan 15, 1993 | 1 km N of Apison, Tennessee | M3.1 | 141 km | 8 km |
| May 2, 2003 | 8 km S of Valley Head, Alabama | M3.1 | 150 km | 15 km |
| Nov 1, 2009 | 1 km ESE of South Cleveland, Tennessee | M3.0 | 141 km | 25 km |
| Jan 21, 2022 | 16 km NNE of Eton, Georgia | M2.9 | 118 km | 15 km |
| May 19, 1997 | 9 km NNW of Trion, Georgia | M2.9 | 134 km | 3 km |
| Sep 19, 1990 | 6 km NNW of Menlo, Georgia | M2.9 | 142 km | 6 km |
| Jul 28, 1990 | 3 km WNW of Varnell, Georgia | M2.9 | 130 km | 14 km |
| Mar 20, 2000 | 7 km WSW of Linwood, Georgia | M2.8 | 138 km | 4 km |
| Dec 10, 2013 | 11 km SSE of Wildwood Lake, Tennessee | M2.8 | 125 km | 8 km |
| Jan 19, 1990 | 4 km E of Cohutta, Georgia | M2.8 | 127 km | 11 km |
| May 15, 2000 | 3 km N of Cleveland, Tennessee | M2.8 | 147 km | 5 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 | 218 km |
| 1989 | Hugo | Category 1 | — | 282 km |
| 1985 | Kate | Category 1 | 75 mph | 289 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
450 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 59 fatalities, 1,322 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 27, 1994 | EF4 | 89 km | 49.0 mi | 3 |
| Nov 22, 1992 | EF4 | 58 km | 20.0 mi | 0 |
| Apr 3, 1974 | EF4 | 43 km | 17.7 mi | 6 |
| Jan 30, 2013 | EF3 | 88 km | 21.8 mi | 1 |
| Dec 22, 2011 | EF3 | 94 km | 11.4 mi | 0 |
| Apr 27, 2011 | EF3 | 69 km | 37.0 mi | 1 |
| Apr 27, 2011 | EF3 | 78 km | 23.1 mi | 0 |
| Mar 15, 2008 | EF3 | 96 km | 16.9 mi | 2 |
| Mar 20, 1998 | EF3 | 40 km | 4.0 mi | 12 |
| Mar 27, 1994 | EF3 | 93 km | 28.0 mi | 0 |
| Mar 27, 1994 | EF3 | 52 km | 44.0 mi | 3 |
| Mar 27, 1994 | EF3 | 58 km | 23.0 mi | 3 |
| Mar 27, 1994 | EF3 | 86 km | 40.0 mi | 9 |
| Feb 21, 1993 | EF3 | 60 km | 8.0 mi | 0 |
| Nov 22, 1992 | EF3 | 59 km | 10.0 mi | 1 |
| Mar 29, 1991 | EF3 | 59 km | 5.0 mi | 0 |
| Nov 15, 1989 | EF3 | 76 km | 8.0 mi | 0 |
| Mar 24, 1975 | EF3 | 53 km | 14.8 mi | 3 |
| Dec 13, 1973 | EF3 | 33 km | 9.5 mi | 0 |
| May 28, 1973 | EF3 | 45 km | 18.7 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (5,084 acres, 2015).
| Year | Name | Acres Burned | Distance |
| 2015 | UNNAMED | 5,084 | 81 km |
| 2010 | COMPT 163 | 4,755 | 97 km |
| 2014 | UNNAMED | 3,298 | 64 km |
| 2018 | UNNAMED | 2,286 | 87 km |
| 2021 | UNNAMED | 2,201 | 77 km |
| 2010 | BRAMLETT RIDGE | 2,200 | 97 km |
| 2023 | BRAMLETT RIDGE FY 23 | 2,172 | 97 km |
| 2018 | UNNAMED | 2,133 | 97 km |
| 2023 | TRAIL RIDGE FY23 | 2,085 | 84 km |
| 2013 | UNNAMED | 2,077 | 100 km |
| 2019 | COMPARTMENT 107 | 2,058 | 95 km |
| 2022 | UNNAMED | 2,047 | 94 km |
| 2013 | UNNAMED | 1,998 | 83 km |
| 2014 | UNNAMED | 1,911 | 97 km |
| 2014 | UNNAMED | 1,879 | 96 km |
| 2019 | UNNAMED | 1,873 | 95 km |
| 2015 | UNNAMED | 1,848 | 94 km |
| 2014 | UNNAMED | 1,803 | 93 km |
| 2022 | UNNAMED | 1,778 | 98 km |
| 2010 | COMPT 155 | 1,775 | 95 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 5.6 in | Coldest |
| February | 45°F (7°C) | 5.0 in | |
| March | 53°F (12°C) | 6.1 in | Wettest |
| April | 60°F (16°C) | 4.7 in | |
| May | 68°F (20°C) | 4.5 in | |
| June | 75°F (24°C) | 3.8 in | |
| July | 78°F (26°C) | 4.7 in | Warmest |
| August | 77°F (25°C) | 4.1 in | |
| September | 72°F (22°C) | 3.9 in | |
| October | 61°F (16°C) | 3.7 in | Driest |
| November | 52°F (11°C) | 4.0 in | |
| December | 44°F (7°C) | 4.8 in |
Suwanee has a seasonal temperature swing of 37°F / from 41°F in January to 78°F in July. Total annual precipitation is 54.8 inches, with March being the wettest month (6.1") and October the driest (3.7").