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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 64°F (18°C). Winters average 46°F in January while summers reach 81°F in July. The area gets 323 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 496 feet.

Temperature

46°F Jan (8°C) 81°F Jul (27°C)
Annual Average64.2°F
19% above US avg
January Average46°F (8°C)
July Average81°F (27°C)
Sunny Days323 days/yr

Geography

Elevation496 ft (151 m)
Area3.4 sq mi (8.9 km²)
Population Density667/sq mi
Coordinates32.5711°N, 89.1152°W
TimezoneAmerica/Chicago
CountyNewton County County
Nearest AirportJackson-Medgar Wiley Evers International (JAN)
59 miles away

Precipitation & Snow

Wettest Month (Mar) 6.42"
Driest Month (Oct) 3.43"

Air Quality

AQI Median43.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score52.5 / 100
Social Vulnerability94.4 / 100
Community Resilience32.2 / 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 46°F (8°C) 5.4 in Coldest
February 48°F (9°C) 5.3 in
March 55°F (13°C) 6.4 in Wettest
April 62°F (17°C) 5.7 in
May 70°F (21°C) 4.7 in
June 77°F (25°C) 3.6 in
July 81°F (27°C) 5.4 in Warmest
August 79°F (26°C) 3.7 in
September 74°F (23°C) 3.6 in
October 63°F (17°C) 3.4 in Driest
November 54°F (12°C) 4.7 in
December 47°F (8°C) 5.8 in

Union has a seasonal temperature swing of 36°F / from 46°F in January to 81°F in July. Total annual precipitation is 57.6 inches, with March being the wettest month (6.4") and October the driest (3.4").

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