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Weather & Climate in Mountain Grove, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mountain Grove experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 31°F in January while summers reach 77°F in July. The area gets 256 sunny days per year, above the national average. Annual precipitation totals 43.9 inches. The area receives 5.6 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 1,480 feet.
Temperature
31°F Jan (-1°C)
77°F Jul (25°C)
| Annual Average | 55.2°F |
| 2% above US avg | |
| January Average | 31°F (-1°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 256 days/yr |
Geography
| Elevation | 1,480 ft (451 m) |
| Area | 4.1 sq mi (10.5 km²) |
| Population Density | 1,118/sq mi |
| Coordinates | 37.1306°N, 92.2635°W |
| Timezone | America/Chicago |
| Nearest Airport | Waynesville-St Robert Regional Forney Field (TBN) 43 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Earthquake History
49 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Oct 21, 1999 | 9 km NW of Maynard, Arkansas | M3.9 | 136 km | 10 km |
| Jul 7, 1991 | 11 km ENE of Brandsville, Missouri | M3.9 | 79 km | 8 km |
| Aug 22, 2000 | 19 km WNW of Maynard, Arkansas | M3.9 | 127 km | 10 km |
| Sep 12, 2019 | 13 km N of Big Flat, Arkansas | M3.7 | 112 km | 18 km |
| Aug 16, 2003 | 5 km W of Thomasville, Missouri | M3.7 | 70 km | 0 km |
| Sep 22, 2011 | 6 km E of Grandin, Missouri | M3.6 | 139 km | 11 km |
| Jun 11, 2017 | 6 km NNE of Bergman, Arkansas | M3.6 | 106 km | 6 km |
| Aug 21, 2022 | 4 km SSW of Imboden, Arkansas | M3.1 | 143 km | 16 km |
| Jan 21, 1992 | 5 km SE of Linn Creek, Missouri | M3.1 | 103 km | 5 km |
| Oct 21, 1999 | 10 km NW of Maynard, Arkansas | M3.1 | 135 km | 9 km |
| Mar 30, 2001 | 1 km SW of Hermitage, Missouri | M3.1 | 129 km | 5 km |
| Mar 18, 1990 | 9 km W of Alton, Missouri | M3.0 | 83 km | 1 km |
| Jun 27, 2025 | 12 km WSW of Grandin, Missouri | M2.9 | 124 km | 10 km |
| Jul 8, 2003 | 1 km N of Leasburg, Missouri | M2.9 | 138 km | 4 km |
| May 21, 2012 | 6 km SW of Williamsville, Missouri | M2.9 | 150 km | 10 km |
| Jun 16, 2017 | 6 km N of Bergman, Arkansas | M2.9 | 106 km | 6 km |
| Sep 27, 2022 | 0.4 km ESE of Maynard, Arkansas | M2.8 | 147 km | 11 km |
| Jul 31, 1995 | 8 km SSW of Caledonia, Missouri | M2.8 | 143 km | 5 km |
| Mar 12, 1990 | 9 km NNE of Briarcliff, Arkansas | M2.8 | 86 km | 0 km |
| May 6, 2018 | 5 km WNW of Smithville, Arkansas | M2.8 | 140 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
407 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 38 fatalities, 480 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Nov 29, 1991 | EF4 | 92 km | 10.0 mi | 2 |
| Apr 2, 1982 | EF4 | 63 km | 20.0 mi | 2 |
| Sep 26, 1959 | EF4 | 44 km | 7.8 mi | 0 |
| May 21, 1957 | EF4 | 99 km | 9.1 mi | 7 |
| Mar 25, 1954 | EF4 | 21 km | 12.1 mi | 2 |
| May 26, 2024 | EF3 | 44 km | 12.4 mi | 0 |
| Dec 31, 2010 | EF3 | 99 km | 11.0 mi | 2 |
| Dec 31, 2010 | EF3 | 62 km | 7.5 mi | 0 |
| May 8, 2009 | EF3 | 41 km | 2.2 mi | 0 |
| Jan 7, 2008 | EF3 | 87 km | 1.8 mi | 0 |
| Jan 7, 2008 | EF3 | 81 km | 50.4 mi | 3 |
| Jan 7, 2008 | EF3 | 89 km | 4.7 mi | 0 |
| Mar 1, 2007 | EF3 | 61 km | 15.0 mi | 1 |
| Mar 12, 2006 | EF3 | 55 km | 32.0 mi | 0 |
| May 4, 2003 | EF3 | 99 km | 14.0 mi | 4 |
| Oct 18, 1984 | EF3 | 77 km | 26.0 mi | 1 |
| Apr 2, 1982 | EF3 | 79 km | 1.5 mi | 2 |
| Apr 11, 1979 | EF3 | 18 km | 35.4 mi | 0 |
| Jul 19, 1970 | EF3 | 91 km | 5.0 mi | 0 |
| May 15, 1968 | EF3 | 84 km | 7.3 mi | 3 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: STEGALL MOUNTAIN (6,979 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | STEGALL MOUNTAIN | 6,979 | 95 km |
| 2007 | UNNAMED | 6,931 | 69 km |
| 2011 | UNNAMED | 6,686 | 71 km |
| 2010 | BRUSHY/CLAYTON | 6,401 | 67 km |
| 2020 | BIG CREEK | 6,399 | 71 km |
| 1994 | UNNAMED | 5,344 | 84 km |
| 2015 | 15 STEGAL MOUNTAIN | 5,112 | 95 km |
| 2021 | ROCK PILE | 5,067 | 31 km |
| 2011 | MINNINGHAW | 4,792 | 89 km |
| 2009 | STEGAL MTN. COMPLEX | 4,717 | 95 km |
| 2017 | UNNAMED | 4,602 | 89 km |
| 2023 | ELM SPRINGS RX | 4,378 | 81 km |
| 2009 | MOUNTAIN CREEK | 4,322 | 89 km |
| 1991 | UNNAMED | 4,179 | 91 km |
| 2016 | BIG CREEK | 4,031 | 75 km |
| 2023 | CANNON RANGE RX | 3,870 | 55 km |
| 2021 | UNNAMED | 3,665 | 40 km |
| 1991 | UNNAMED | 3,533 | 84 km |
| 1991 | UNNAMED | 3,492 | 98 km |
| 1999 | STEGALL99 | 3,415 | 95 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 2.1 in | Coldest, Driest |
| February | 37°F (3°C) | 2.4 in | |
| March | 46°F (8°C) | 4.1 in | |
| April | 55°F (13°C) | 4.3 in | |
| May | 64°F (18°C) | 4.7 in | Wettest |
| June | 72°F (22°C) | 4.0 in | |
| July | 77°F (25°C) | 3.5 in | Warmest |
| August | 76°F (24°C) | 3.5 in | |
| September | 68°F (20°C) | 4.1 in | |
| October | 57°F (14°C) | 3.5 in | |
| November | 45°F (7°C) | 4.2 in | |
| December | 36°F (2°C) | 3.5 in |
Mountain Grove has a seasonal temperature swing of 46°F / from 31°F in January to 77°F in July. Total annual precipitation is 43.9 inches, with May being the wettest month (4.7") and January the driest (2.1").