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Weather & Climate in Summersville, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Summersville 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 258 sunny days per year, above the national average. Annual precipitation totals 43.1 inches. The area receives 2.1 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 1,234 feet.
Temperature
31°F Jan (-0°C)
77°F Jul (25°C)
| Annual Average | 55.3°F |
| 2% above US avg | |
| January Average | 31°F (-0°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 258 days/yr |
Geography
| Elevation | 1,234 ft (376 m) |
| Area | 1.1 sq mi (2.9 km²) |
| Population Density | 385/sq mi |
| Coordinates | 37.1792°N, 91.6568°W |
| Timezone | America/Chicago |
| Nearest Airport | Waynesville-St Robert Regional Forney Field (TBN) 47 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Earthquake History
77 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Jul 7, 1991 | 11 km ENE of Brandsville, Missouri | M3.9 | 56 km | 8 km |
| Oct 21, 1999 | 9 km NW of Maynard, Arkansas | M3.9 | 99 km | 10 km |
| Aug 22, 2000 | 19 km WNW of Maynard, Arkansas | M3.9 | 93 km | 10 km |
| Jun 7, 2011 | 18 km NNW of Potosi, Missouri | M3.9 | 120 km | 21 km |
| Aug 16, 2003 | 5 km W of Thomasville, Missouri | M3.7 | 43 km | 0 km |
| Sep 12, 2019 | 13 km N of Big Flat, Arkansas | M3.7 | 135 km | 18 km |
| Jun 11, 2017 | 6 km NNE of Bergman, Arkansas | M3.6 | 149 km | 6 km |
| Sep 22, 2011 | 6 km E of Grandin, Missouri | M3.6 | 90 km | 11 km |
| Aug 20, 1994 | 4 km NE of Black Rock, Arkansas | M3.5 | 127 km | 10 km |
| Aug 27, 1993 | 5 km SSE of Olympian Village, Missouri | M3.3 | 148 km | 22 km |
| Jan 20, 2010 | 4 km WNW of Lynn, Arkansas | M3.3 | 133 km | 0 km |
| Aug 21, 2022 | 4 km SSW of Imboden, Arkansas | M3.1 | 120 km | 16 km |
| Jan 21, 1992 | 5 km SE of Linn Creek, Missouri | M3.1 | 128 km | 5 km |
| Oct 21, 1999 | 10 km NW of Maynard, Arkansas | M3.1 | 98 km | 9 km |
| Mar 18, 1990 | 9 km W of Alton, Missouri | M3.0 | 56 km | 1 km |
| Jun 27, 2025 | 12 km WSW of Grandin, Missouri | M2.9 | 78 km | 10 km |
| May 21, 2013 | Arkansas | M2.9 | 141 km | 15 km |
| Jul 8, 2003 | 1 km N of Leasburg, Missouri | M2.9 | 108 km | 4 km |
| Jan 26, 2009 | 1 km NNE of Walnut Ridge, Arkansas | M2.9 | 138 km | 4 km |
| Feb 9, 2004 | 1 km SW of Reyno, Arkansas | M2.9 | 121 km | 13 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
353 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 39 fatalities, 439 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 24, 2002 | EF4 | 60 km | 40.5 mi | 0 |
| Apr 2, 1982 | EF4 | 84 km | 20.0 mi | 2 |
| Jun 22, 1969 | EF4 | 99 km | 20.2 mi | 2 |
| Dec 21, 1967 | EF4 | 73 km | 27.9 mi | 3 |
| Sep 26, 1959 | EF4 | 92 km | 7.8 mi | 0 |
| May 21, 1957 | EF4 | 50 km | 9.1 mi | 7 |
| Mar 25, 1954 | EF4 | 53 km | 12.1 mi | 2 |
| May 26, 2024 | EF3 | 21 km | 12.4 mi | 0 |
| May 25, 2011 | EF3 | 82 km | 47.4 mi | 0 |
| Dec 31, 2010 | EF3 | 86 km | 11.0 mi | 2 |
| Dec 31, 2010 | EF3 | 73 km | 7.5 mi | 0 |
| May 8, 2009 | EF3 | 41 km | 2.2 mi | 0 |
| Jan 7, 2008 | EF3 | 88 km | 4.7 mi | 0 |
| Jan 7, 2008 | EF3 | 88 km | 1.8 mi | 0 |
| Mar 1, 2007 | EF3 | 79 km | 15.0 mi | 1 |
| Jun 1, 1999 | EF3 | 91 km | 7.0 mi | 0 |
| Oct 18, 1984 | EF3 | 47 km | 26.0 mi | 1 |
| Apr 2, 1982 | EF3 | 93 km | 1.5 mi | 2 |
| Apr 11, 1979 | EF3 | 45 km | 35.4 mi | 0 |
| Jul 19, 1970 | EF3 | 58 km | 5.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: HANDY (12,818 acres, 2012).
| Year | Name | Acres Burned | Distance |
| 2012 | HANDY | 12,818 | 58 km |
| 2011 | UNNAMED | 9,641 | 66 km |
| 2022 | CEDAR BLUFF | 9,617 | 59 km |
| 2020 | BIG BARREN CREEK | 8,150 | 55 km |
| 2022 | STEGALL MOUNTAIN | 6,979 | 42 km |
| 2015 | 15 STEGAL MOUNTAIN | 5,112 | 42 km |
| 2021 | ROCK PILE | 5,067 | 45 km |
| 2011 | MINNINGHAW | 4,792 | 42 km |
| 2024 | BRIDGES RX | 4,781 | 70 km |
| 2009 | STEGAL MTN. COMPLEX | 4,717 | 43 km |
| 2017 | UNNAMED | 4,602 | 41 km |
| 2023 | ELM SPRINGS RX | 4,378 | 77 km |
| 2021 | MILLER KING | 4,130 | 99 km |
| 2023 | CANNON RANGE RX | 3,870 | 71 km |
| 2021 | UNNAMED | 3,665 | 44 km |
| 1999 | STEGALL99 | 3,415 | 43 km |
| 2021 | KAINTUCK | 3,325 | 77 km |
| 2013 | UNNAMED | 3,313 | 94 km |
| 2005 | UNNAMED | 3,252 | 40 km |
| 2024 | WOLF MOUNTAIN RX | 3,140 | 77 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 2.1 in | Coldest, Driest |
| February | 36°F (2°C) | 2.4 in | |
| March | 46°F (8°C) | 4.2 in | |
| April | 56°F (13°C) | 4.2 in | |
| May | 64°F (18°C) | 4.7 in | Wettest |
| June | 72°F (22°C) | 3.8 in | |
| July | 77°F (25°C) | 3.6 in | Warmest |
| August | 76°F (24°C) | 3.8 in | |
| September | 68°F (20°C) | 4.0 in | |
| October | 57°F (14°C) | 3.2 in | |
| November | 46°F (8°C) | 3.8 in | |
| December | 36°F (2°C) | 3.5 in |
Summersville has a seasonal temperature swing of 46°F / from 31°F in January to 77°F in July. Total annual precipitation is 43.1 inches, with May being the wettest month (4.7") and January the driest (2.1").