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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 (13°C). Winters average 31°F in January while summers reach 78°F in July. The area gets 257 sunny days per year, above the national average. Annual precipitation totals 43.7 inches. The area receives 1.8 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 1,204 feet.
Temperature
31°F Jan (-1°C)
78°F Jul (25°C)
| Annual Average | 55.5°F |
| 3% above US avg | |
| January Average | 31°F (-1°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 257 days/yr |
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
| AQI Median | 41.0 |
| Rating | Good |
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 | 31°F (-1°C) | 1.8 in | Coldest, Driest |
| February | 36°F (2°C) | 2.1 in | |
| March | 46°F (8°C) | 3.9 in | |
| April | 55°F (13°C) | 4.1 in | |
| May | 64°F (18°C) | 4.8 in | |
| June | 72°F (22°C) | 5.0 in | Wettest |
| July | 78°F (25°C) | 3.2 in | Warmest |
| August | 77°F (25°C) | 3.8 in | |
| September | 69°F (21°C) | 4.7 in | |
| October | 58°F (14°C) | 3.7 in | |
| November | 46°F (8°C) | 3.9 in | |
| December | 36°F (2°C) | 2.9 in |
Mount Vernon has a seasonal temperature swing of 47°F / from 31°F in January to 78°F in July. Total annual precipitation is 43.7 inches, with June being the wettest month (5.0") and January the driest (1.8").