Weather & Climate in Union, MS
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Union enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 45°F in January while summers reach 80°F in July. Annual precipitation totals 58.2 inches (wetter than the 38-inch national average). The city sits at an elevation of 496 feet.
Temperature
45°F Jan (7°C)
80°F Jul (26°C)
| Annual Average | 63.2°F |
| 17% above US avg | |
| January Average | 45°F (7°C) |
| July Average | 80°F (26°C) |
Geography
| Elevation | 496 ft (151 m) |
| Area | 3.4 sq mi (8.9 km²) |
| Population Density | 667/sq mi |
| Coordinates | 32.5711°N, 89.1152°W |
| Timezone | America/Chicago |
| County | Newton County County |
| Nearest Airport | Jackson-Medgar Wiley Evers International (JAN) 59 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 52.5 / 100 |
| Social Vulnerability | 94.4 / 100 |
| Community Resilience | 32.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
29 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.7.
| Jul 16, 1993 | 2 km SSW of Silas, Alabama | M3.7 | 117 km | 5 km |
| Jun 30, 2015 | 12 km W of Union, Alabama | M3.5 | 110 km | 0 km |
| Mar 25, 1996 | 11 km NNE of Quitman, Mississippi | M3.5 | 64 km | 5 km |
| May 28, 1995 | 14 km WSW of Coker, Alabama | M3.4 | 139 km | 1 km |
| Jun 24, 1998 | 11 km W of Demopolis, Alabama | M3.4 | 109 km | 5 km |
| Mar 22, 2005 | 9 km NNE of Coffeeville, Alabama | M3.3 | 129 km | 5 km |
| May 3, 2015 | 7 km SSW of Canton, Mississippi | M3.2 | 90 km | 5 km |
| Jun 29, 2015 | 6 km SSW of Canton, Mississippi | M3.2 | 90 km | 5 km |
| Mar 12, 2015 | 14 km W of Union, Alabama | M3.1 | 108 km | 0 km |
| May 16, 2008 | 10 km W of Coffeeville, Alabama | M3.1 | 124 km | 5 km |
| Feb 27, 2015 | 11 km WSW of Union, Alabama | M3.1 | 110 km | 0 km |
| May 21, 2002 | 7 km ESE of York, Alabama | M3.0 | 85 km | 27 km |
| Mar 15, 2025 | 5 km NNE of Magee, Mississippi | M3.0 | 91 km | 10 km |
| May 3, 2015 | 8 km WSW of Canton, Mississippi | M3.0 | 94 km | 5 km |
| May 7, 1998 | 9 km SSE of Bellamy, Alabama | M2.8 | 97 km | 10 km |
| Aug 9, 2019 | Mississippi | M2.8 | 86 km | 5 km |
| Feb 19, 2015 | 14 km W of Union, Alabama | M2.8 | 108 km | 0 km |
| Aug 13, 2015 | 9 km WSW of Union, Alabama | M2.7 | 112 km | 1 km |
| Feb 19, 2015 | 13 km W of Union, Alabama | M2.7 | 110 km | 0 km |
| Jun 6, 2015 | 9 km W of Union, Alabama | M2.7 | 113 km | 1 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
12 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2021 | Ida | Category 3 | 121 mph | 271 km |
| 2020 | Sally | Category 2 | 109 mph | 255 km |
| 2020 | Zeta | Category 2 | 98 mph | 132 km |
| 2017 | Nate | Category 1 | 75 mph | 242 km |
| 2005 | Dennis | Category 3 | 127 mph | 261 km |
| 2005 | Katrina | Category 3 | 121 mph | 79 km |
| 2004 | Ivan | Category 3 | 121 mph | 187 km |
| 1998 | Georges | Category 2 | 104 mph | 220 km |
| 1997 | Danny | Category 1 | 81 mph | 268 km |
| 1995 | Opal | Category 3 | 115 mph | 251 km |
| 1995 | Erin | Category 2 | 98 mph | 267 km |
| 1985 | Elena | Category 3 | 115 mph | 218 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
775 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 65 fatalities, 800 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 27, 2011 | EF5 | 25 km | 28.3 mi | 3 |
| Apr 28, 2014 | EF4 | 45 km | 33.4 mi | 10 |
| Apr 27, 2011 | EF4 | 70 km | 122.0 mi | 7 |
| Nov 22, 1992 | EF4 | 89 km | 40.0 mi | 0 |
| Jan 19, 1988 | EF4 | 78 km | 13.0 mi | 0 |
| Mar 12, 1986 | EF4 | 37 km | 23.0 mi | 0 |
| Feb 23, 1977 | EF4 | 51 km | 15.0 mi | 2 |
| Dec 2, 1967 | EF4 | 35 km | 7.6 mi | 2 |
| Mar 11, 1963 | EF4 | 83 km | 45.2 mi | 2 |
| May 1, 1953 | EF4 | 78 km | 0.1 mi | 2 |
| Jun 18, 2023 | EF3 | 64 km | 6.5 mi | 1 |
| Mar 22, 2022 | EF3 | 21 km | 9.2 mi | 0 |
| Apr 28, 2014 | EF3 | 39 km | 4.3 mi | 0 |
| Apr 28, 2014 | EF3 | 92 km | 10.5 mi | 0 |
| Apr 11, 2013 | EF3 | 25 km | 66.4 mi | 1 |
| Oct 17, 2012 | EF3 | 35 km | 14.4 mi | 0 |
| Apr 27, 2011 | EF3 | 100 km | 72.1 mi | 7 |
| Apr 27, 2011 | EF3 | 32 km | 10.3 mi | 0 |
| Apr 27, 2011 | EF3 | 69 km | 23.7 mi | 0 |
| Apr 27, 2011 | EF3 | 72 km | 8.9 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: BIEN 75-78 (4,658 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | BIEN 75-78 | 4,658 | 50 km |
| 2021 | BIENVILLE - CPT 38-39-40 | 4,545 | 51 km |
| 2018 | UNNAMED | 4,007 | 48 km |
| 2010 | COMP 222-223-224 | 3,745 | 45 km |
| 2016 | MSNXR FY16 RX 1703B | 3,633 | 77 km |
| 1988 | UNNAMED | 3,616 | 75 km |
| 1990 | UNNAMED | 3,605 | 76 km |
| 2002 | UNNAMED | 3,593 | 74 km |
| 2005 | UNNAMED | 3,556 | 87 km |
| 2017 | UNNAMED | 3,547 | 52 km |
| 1987 | 10 NOVEMBER | 3,301 | 77 km |
| 2017 | UNNAMED | 3,053 | 76 km |
| 2010 | BIEN 1-4 | 2,983 | 52 km |
| 2017 | UNNAMED | 2,935 | 45 km |
| 2014 | UNNAMED | 2,887 | 76 km |
| 2020 | TOMBIGBEE COMP 54/55/56 | 2,846 | 76 km |
| 2021 | BIENVILLE CPT 1-4 | 2,761 | 52 km |
| 2022 | TOMBIGBEE BB 54 55 56 | 2,736 | 76 km |
| 2022 | BIENVILLE CPT 203/205 | 2,731 | 46 km |
| 1995 | 16 | 2,482 | 79 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 45°F (7°C) | 5.5 in | Coldest |
| February | 49°F (10°C) | 5.5 in | |
| March | 56°F (13°C) | 5.6 in | |
| April | 63°F (17°C) | 6.2 in | Wettest |
| May | 71°F (21°C) | 4.1 in | |
| June | 77°F (25°C) | 4.7 in | |
| July | 80°F (26°C) | 5.2 in | Warmest |
| August | 79°F (26°C) | 4.6 in | |
| September | 74°F (23°C) | 3.2 in | Driest |
| October | 64°F (18°C) | 3.8 in | |
| November | 53°F (12°C) | 4.4 in | |
| December | 48°F (9°C) | 5.4 in |
Union has a seasonal temperature swing of 34°F / from 45°F in January to 80°F in July. Total annual precipitation is 58.2 inches, with April being the wettest month (6.2") and September the driest (3.2").