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Weather & Climate in Glen St. Mary, FL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Glen St. Mary enjoys a temperate climate with an average annual temperature of 69°F (20°C). Winters average 54°F in January while summers reach 82°F in July. The area gets 306 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 53.2 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 133 feet.
Temperature
54°F Jan (12°C)
82°F Jul (28°C)
| Annual Average | 68.8°F |
| 27% above US avg | |
| January Average | 54°F (12°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 306 days/yr |
Geography
| Elevation | 133 ft (41 m) |
| Area | 0.5 sq mi (1.2 km²) |
| Population Density | 1,339/sq mi |
| Coordinates | 30.2752°N, 82.1603°W |
| Timezone | America/New_York |
| County | Baker County County |
| Nearest Airport | Jacksonville International (JAX) 32 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 13.3 / 100 |
| Social Vulnerability | 24.4 / 100 |
| Community Resilience | 71.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Coastal Flood | No Rating |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Hurricane History
22 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 | 141 km |
| 2024 | Milton | Category 2 | 81 mph | 253 km |
| 2024 | Debby | Category 1 | 81 mph | 126 km |
| 2023 | Idalia | Category 4 | 132 mph | 93 km |
| 2022 | Ian | Category 1 | 86 mph | 251 km |
| 2020 | Isaias | Category 1 | 92 mph | 257 km |
| 2019 | Dorian | Category 3 | 115 mph | 237 km |
| 2018 | Michael | Category 3 | 92 mph | 262 km |
| 2017 | Irma | Category 1 | 75 mph | 231 km |
| 2016 | Matthew | Category 3 | 127 mph | 141 km |
| 2016 | Hermine | Category 1 | 81 mph | 177 km |
| 2014 | Arthur | Category 1 | 81 mph | 285 km |
| 2004 | Jeanne | Category 1 | 86 mph | 254 km |
| 2004 | Charley | Category 1 | 86 mph | 132 km |
| 2000 | Gordon | Category 1 | 75 mph | 299 km |
| 1999 | Floyd | Category 3 | 109 mph | 296 km |
| 1999 | Irene | Category 1 | 75 mph | 227 km |
| 1995 | Erin | Category 1 | 86 mph | 295 km |
| 1985 | Elena | Category 3 | 127 mph | 228 km |
| 1985 | Kate | Category 1 | 92 mph | 187 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
423 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 5 fatalities, 128 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 2, 2018 | EF3 | 81 km | 7.1 mi | 0 |
| Feb 7, 1971 | EF3 | 72 km | 13.1 mi | 0 |
| Feb 25, 1960 | EF3 | 46 km | 0.8 mi | 0 |
| Apr 15, 1958 | EF3 | 94 km | 3.6 mi | 0 |
| Mar 7, 2008 | EF2 | 48 km | 1.5 mi | 1 |
| Apr 15, 2007 | EF2 | 30 km | 1.5 mi | 0 |
| Dec 25, 2006 | EF2 | 32 km | 2.7 mi | 0 |
| Aug 12, 2004 | EF2 | 41 km | 7.0 mi | 0 |
| Mar 29, 2001 | EF2 | 60 km | 12.0 mi | 0 |
| Mar 13, 2001 | EF2 | 84 km | 3.5 mi | 0 |
| Sep 29, 1998 | EF2 | 90 km | 2.0 mi | 0 |
| Feb 2, 1996 | EF2 | 43 km | 6.0 mi | 0 |
| Apr 24, 1995 | EF2 | 81 km | 10.0 mi | 0 |
| Oct 2, 1994 | EF2 | 77 km | 0.2 mi | 0 |
| Mar 14, 1986 | EF2 | 71 km | 2.0 mi | 0 |
| Feb 27, 1984 | EF2 | 57 km | 3.0 mi | 0 |
| Feb 27, 1984 | EF2 | 83 km | 3.0 mi | 0 |
| Apr 23, 1983 | EF2 | 94 km | 15.0 mi | 0 |
| Feb 2, 1983 | EF2 | 85 km | 0.3 mi | 0 |
| May 4, 1978 | EF2 | 83 km | 12.8 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 (328,827 acres, 2007).
| Year | Name | Acres Burned | Distance |
| 2007 | BIG TURNAROUND COMPLEX | 328,827 | 41 km |
| 2007 | BIG TURNAROUND COMPLEX (FLOYDS ISLAND PRAIRIE) | 215,381 | 76 km |
| 2017 | WEST MIMS | 166,737 | 44 km |
| 2011 | HONEY PRAIRIE | 147,065 | 48 km |
| 2011 | CRAVENS HAMMOCK | 142,688 | 61 km |
| 2002 | BLACKJACK BAY COMPLEX | 107,076 | 48 km |
| 1999 | FRIENDLY | 75,089 | 37 km |
| 2001 | UNNAMED | 59,179 | 95 km |
| 2007 | SWEAT FARM ROAD | 52,495 | 97 km |
| 2012 | COUNTY LINE | 35,440 | 39 km |
| 2004 | IMPASSABLE ONE | 29,836 | 28 km |
| 1998 | OAK | 21,478 | 33 km |
| 1990 | SHORTS | 21,413 | 53 km |
| 2011 | GA-19 (SAW FLY RD) | 19,730 | 84 km |
| 2011 | DURDIN PRAIRIE | 19,487 | 65 km |
| 2004 | UNNAMED | 18,577 | 34 km |
| 1998 | UNNAMED | 16,594 | 21 km |
| 1989 | PIN HOOK | 16,471 | 34 km |
| 1999 | HICKORY IS | 14,656 | 71 km |
| 2014 | UNNAMED | 14,543 | 20 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 54°F (12°C) | 3.7 in | Coldest |
| February | 56°F (13°C) | 3.8 in | |
| March | 62°F (17°C) | 4.1 in | |
| April | 67°F (19°C) | 2.8 in | |
| May | 74°F (23°C) | 3.9 in | |
| June | 79°F (26°C) | 6.3 in | |
| July | 82°F (28°C) | 6.8 in | Warmest |
| August | 81°F (27°C) | 7.8 in | Wettest |
| September | 78°F (25°C) | 5.9 in | |
| October | 70°F (21°C) | 2.2 in | Driest |
| November | 62°F (17°C) | 2.3 in | |
| December | 55°F (13°C) | 3.1 in |
Glen St. Mary has a seasonal temperature swing of 29°F / from 54°F in January to 82°F in July. Total annual precipitation is 52.8 inches, with August being the wettest month (7.8") and October the driest (2.2").