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Weather & Climate in Union Grove, AL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Union Grove enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 42°F in January while summers reach 80°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 56.8 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 1,030 feet.
Temperature
42°F Jan (5°C)
80°F Jul (27°C)
| Annual Average | 61.9°F |
| 15% above US avg | |
| January Average | 42°F (5°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 301 days/yr |
Geography
| Elevation | 1,030 ft (314 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 132/sq mi |
| Coordinates | 34.4062°N, 86.4517°W |
| Timezone | America/Chicago |
| County | Marshall County County |
| Nearest Airport | Huntsville International-Carl T Jones Field (HSV) 24 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 87.3 / 100 |
| Social Vulnerability | 75.4 / 100 |
| Community Resilience | 39.0 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
96 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Apr 29, 2003 | 8 km S of Valley Head, Alabama | M4.6 | 76 km | 20 km |
| Dec 8, 2001 | 5 km SW of Pleasant Groves, Alabama | M3.9 | 39 km | 0 km |
| Aug 19, 2004 | 8 km W of Brantleyville, Alabama | M3.6 | 142 km | 5 km |
| May 9, 2004 | 8 km WNW of Brantleyville, Alabama | M3.3 | 139 km | 5 km |
| Apr 5, 1994 | 10 km N of Trenton, Georgia | M3.2 | 108 km | 24 km |
| May 6, 2010 | 11 km ENE of Whitesboro, Alabama | M3.2 | 52 km | 5 km |
| Mar 21, 2001 | 7 km ESE of Trenton, Georgia | M3.2 | 105 km | 0 km |
| May 10, 2020 | 7 km SSE of Sewanee, Tennessee | M3.1 | 96 km | 8 km |
| Jan 15, 1993 | 1 km N of Apison, Tennessee | M3.1 | 148 km | 8 km |
| May 2, 2003 | 8 km S of Valley Head, Alabama | M3.1 | 78 km | 15 km |
| Apr 29, 2003 | 7 km E of Fort Payne, Alabama | M3.1 | 75 km | 3 km |
| May 4, 1994 | 2 km NNW of Addison, Alabama | M3.0 | 71 km | 19 km |
| May 28, 2000 | 13 km S of Winfield, Alabama | M3.0 | 142 km | 5 km |
| May 4, 1994 | 12 km NNW of Addison, Alabama | M3.0 | 74 km | 5 km |
| Mar 20, 2004 | 11 km NW of Wilton, Alabama | M3.0 | 149 km | 0 km |
| May 4, 2007 | 4 km SSW of Jasper, Alabama | M3.0 | 103 km | 5 km |
| Sep 13, 2011 | 1 km NNW of Leeds, Alabama | M3.0 | 95 km | 19 km |
| May 28, 2000 | 3 km NE of Fayette, Alabama | M3.0 | 147 km | 0 km |
| Mar 28, 1991 | 5 km NNW of Westover, Alabama | M2.9 | 113 km | 28 km |
| Jan 2, 2000 | 4 km SW of Lester, Alabama | M2.9 | 91 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 1995 | Opal | Category 1 | — | 257 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
763 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 254 fatalities, 3,127 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 27, 2011 | EF5 | 44 km | 36.6 mi | 25 |
| Apr 3, 1974 | EF5 | 64 km | 83.3 mi | 16 |
| Apr 3, 1974 | EF5 | 95 km | 52.0 mi | 28 |
| Apr 27, 2011 | EF4 | 66 km | 30.2 mi | 1 |
| Apr 27, 2011 | EF4 | 63 km | 46.9 mi | 6 |
| Apr 27, 2011 | EF4 | 82 km | 97.3 mi | 22 |
| Apr 27, 2011 | EF4 | 49 km | 47.0 mi | 14 |
| Apr 24, 2010 | EF4 | 68 km | 16.6 mi | 0 |
| Feb 6, 2008 | EF4 | 77 km | 16.7 mi | 4 |
| Feb 6, 2008 | EF4 | 63 km | 10.9 mi | 1 |
| Nov 24, 2001 | EF4 | 54 km | 10.1 mi | 0 |
| May 18, 1995 | EF4 | 71 km | 39.0 mi | 1 |
| Mar 27, 1994 | EF4 | 81 km | 50.0 mi | 22 |
| Nov 15, 1989 | EF4 | 33 km | 18.5 mi | 21 |
| Apr 3, 1974 | EF4 | 66 km | 27.5 mi | 11 |
| May 19, 1973 | EF4 | 65 km | 5.4 mi | 0 |
| Mar 11, 1963 | EF4 | 70 km | 28.0 mi | 2 |
| Nov 18, 1957 | EF4 | 48 km | 26.1 mi | 3 |
| Nov 17, 1957 | EF4 | 88 km | 7.2 mi | 4 |
| Apr 24, 1955 | EF4 | 55 km | 8.6 mi | 5 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (3,112 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | UNNAMED | 3,112 | 88 km |
| 2007 | PENTECOST | 3,095 | 83 km |
| 2020 | BK OWL CREEK | 2,838 | 75 km |
| 2024 | AL-MLR UNITS 2/3 RX | 2,836 | 99 km |
| 2014 | UNNAMED | 2,822 | 76 km |
| 2017 | UNNAMED | 2,764 | 83 km |
| 2019 | UNNAMED | 2,710 | 72 km |
| 1987 | STATEC0045 | 2,669 | 85 km |
| 2011 | GREEN TOWER | 2,653 | 68 km |
| 2006 | UNNAMED | 2,642 | 92 km |
| 2010 | ML 0301 RX BURN | 2,631 | 99 km |
| 2016 | UNNAMED | 2,602 | 73 km |
| 2017 | UNNAMED | 2,442 | 84 km |
| 2006 | UNNAMED | 2,405 | 80 km |
| 1994 | UNNAMED | 2,394 | 91 km |
| 2015 | BIG TREE | 2,288 | 89 km |
| 2007 | WILDCAT BRANCH WFIRE | 2,285 | 79 km |
| 2018 | UNNAMED | 2,264 | 78 km |
| 2010 | BALLS MT. | 2,229 | 95 km |
| 2015 | UNNAMED | 2,160 | 74 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (5°C) | 5.3 in | Coldest |
| February | 43°F (6°C) | 4.9 in | |
| March | 51°F (11°C) | 6.5 in | Wettest |
| April | 59°F (15°C) | 5.1 in | |
| May | 67°F (19°C) | 4.9 in | |
| June | 74°F (23°C) | 3.9 in | |
| July | 80°F (27°C) | 4.9 in | Warmest |
| August | 77°F (25°C) | 3.3 in | |
| September | 71°F (22°C) | 4.5 in | |
| October | 60°F (16°C) | 3.2 in | Driest |
| November | 51°F (10°C) | 4.5 in | |
| December | 43°F (6°C) | 5.4 in |
Union Grove has a seasonal temperature swing of 39°F / from 42°F in January to 80°F in July. Total annual precipitation is 56.3 inches, with March being the wettest month (6.5") and October the driest (3.2").