Weather & Climate in Mount Vernon, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mount Vernon enjoys a temperate climate with an average annual temperature of 56°F (14°C). Winters average 33°F in January while summers reach 78°F in July. Annual precipitation totals 45.5 inches. The area receives 11.9 inches of snow annually. The city sits at an elevation of 1,204 feet.
Temperature
33°F Jan (1°C)
78°F Jul (26°C)
| Annual Average | 56.4°F |
| 4% above US avg | |
| January Average | 33°F (1°C) |
| July Average | 78°F (26°C) |
Geography
| Elevation | 1,204 ft (367 m) |
| Area | 3.9 sq mi (10.0 km²) |
| Population Density | 1,095/sq mi |
| Coordinates | 37.1037°N, 93.8185°W |
| Timezone | America/Chicago |
| Nearest Airport | Joplin Regional (JLN) 38 miles away |
Precipitation & Snow
Air Quality
Earthquake History
14 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Jun 11, 2017 | 6 km NNE of Bergman, Arkansas | M3.6 | 110 km | 6 km |
| Mar 30, 2001 | 1 km SW of Hermitage, Missouri | M3.1 | 102 km | 5 km |
| Jan 21, 1992 | 5 km SE of Linn Creek, Missouri | M3.1 | 142 km | 5 km |
| Jun 16, 2017 | 6 km N of Bergman, Arkansas | M2.9 | 109 km | 6 km |
| Jul 3, 2014 | 6 km S of Yellville, Arkansas | M2.7 | 146 km | 8 km |
| May 21, 2010 | 2 km SW of Centerton, Arkansas | M2.6 | 95 km | 1 km |
| Apr 4, 2015 | 3 km ESE of Clinton, Missouri | M2.6 | 140 km | 2 km |
| Apr 23, 2025 | 3 km E of Hartville, Missouri | M2.6 | 121 km | 4 km |
| Apr 29, 2018 | 3 km WNW of Evergreen, Missouri | M2.5 | 117 km | 2 km |
| Jun 21, 2017 | 6 km N of Bergman, Arkansas | M2.5 | 109 km | 5 km |
| May 13, 2015 | 8 km E of Lead Hill, Arkansas | M2.5 | 116 km | 0 km |
| Jan 4, 2024 | 13 km E of South Lead Hill, Arkansas | M2.5 | 122 km | 4 km |
| Apr 29, 2010 | 3 km SW of Centerton, Arkansas | M2.5 | 96 km | 0 km |
| Aug 11, 2011 | 11 km WSW of Jasper, Arkansas | M2.5 | 134 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
597 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 199 fatalities, 1,844 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 22, 2011 | EF5 | 69 km | 21.6 mi | 158 |
| Nov 29, 1991 | EF4 | 46 km | 10.0 mi | 2 |
| Apr 24, 1975 | EF4 | 74 km | 11.9 mi | 3 |
| May 22, 2019 | EF3 | 43 km | 11.3 mi | 3 |
| May 22, 2019 | EF3 | 72 km | 9.2 mi | 0 |
| Jan 7, 2008 | EF3 | 62 km | 50.4 mi | 3 |
| Mar 12, 2006 | EF3 | 14 km | 42.0 mi | 1 |
| Mar 12, 2006 | EF3 | 86 km | 32.0 mi | 0 |
| Mar 12, 2006 | EF3 | 90 km | 17.0 mi | 0 |
| May 4, 2003 | EF3 | 40 km | 49.0 mi | 7 |
| May 4, 2003 | EF3 | 81 km | 86.0 mi | 5 |
| May 4, 1999 | EF3 | 98 km | 3.0 mi | 0 |
| May 17, 1995 | EF3 | 99 km | 14.0 mi | 0 |
| Apr 29, 1983 | EF3 | 34 km | 5.5 mi | 1 |
| Mar 26, 1983 | EF3 | 86 km | 7.0 mi | 0 |
| Mar 15, 1982 | EF3 | 99 km | 70.0 mi | 2 |
| Mar 15, 1982 | EF3 | 78 km | 9.0 mi | 0 |
| Mar 26, 1976 | EF3 | 33 km | 29.1 mi | 1 |
| Apr 20, 1973 | EF3 | 52 km | 1.0 mi | 0 |
| Apr 20, 1973 | EF3 | 34 km | 7.8 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (6,931 acres, 2007).
| Year | Name | Acres Burned | Distance |
| 2007 | UNNAMED | 6,931 | 99 km |
| 2010 | BRUSHY/CLAYTON | 6,401 | 99 km |
| 1986 | UNNAMED | 3,427 | 77 km |
| 2019 | SWAN CREEK | 2,365 | 81 km |
| 2002 | ROUNDTPCOX | 2,248 | 75 km |
| 2021 | EAST FORK | 2,134 | 53 km |
| 2016 | UNNAMED | 2,108 | 97 km |
| 2023 | DEVREAUX | 2,031 | 74 km |
| 2007 | UNNAMED | 2,031 | 99 km |
| 1995 | UNNAMED | 2,022 | 90 km |
| 2024 | EAST FORK RX | 1,956 | 53 km |
| 2018 | ROCK CREEK RX | 1,956 | 52 km |
| 2013 | ROCK CREEK RX | 1,888 | 52 km |
| 2022 | ROCK CREEK | 1,867 | 52 km |
| 1989 | UNNAMED | 1,523 | 87 km |
| 1996 | UNNAMED | 1,356 | 83 km |
| 1996 | UNNAMED | 1,346 | 61 km |
| 2022 | BRUSHY CLAYTON | 1,329 | 98 km |
| 1995 | UNNAMED | 1,280 | 67 km |
| 2021 | CLARK | 1,257 | 97 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (1°C) | 2.4 in | Coldest |
| February | 37°F (3°C) | 2.3 in | Driest |
| March | 47°F (8°C) | 3.7 in | |
| April | 56°F (13°C) | 4.6 in | |
| May | 65°F (18°C) | 5.9 in | Wettest |
| June | 74°F (23°C) | 5.3 in | |
| July | 78°F (26°C) | 4.0 in | Warmest |
| August | 77°F (25°C) | 3.0 in | |
| September | 69°F (21°C) | 4.7 in | |
| October | 58°F (14°C) | 3.0 in | |
| November | 46°F (8°C) | 3.9 in | |
| December | 37°F (3°C) | 2.8 in |
Mount Vernon has a seasonal temperature swing of 45°F / from 33°F in January to 78°F in July. Total annual precipitation is 45.5 inches, with May being the wettest month (5.9") and February the driest (2.3").