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Weather & Climate in South Fork, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
South Fork enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 33°F in January while summers reach 78°F in July. The area gets 255 sunny days per year, above the national average. Annual precipitation totals 44.8 inches. The area receives 2.5 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 1,099 feet.
Temperature
33°F Jan (0°C)
78°F Jul (26°C)
| Annual Average | 56.5°F |
| 5% above US avg | |
| January Average | 33°F (0°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 255 days/yr |
Geography
| Elevation | 1,099 ft (335 m) |
| Area | 3.5 sq mi (9.1 km²) |
| Population Density | 19/sq mi |
| Coordinates | 36.6278°N, 91.9627°W |
| Timezone | America/Chicago |
| Nearest Airport | Sharp County Regional (CKK) 34 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Earthquake History
110 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 | 36 km | 8 km |
| Aug 22, 2000 | 19 km WNW of Maynard, Arkansas | M3.9 | 79 km | 10 km |
| Oct 21, 1999 | 9 km NW of Maynard, Arkansas | M3.9 | 90 km | 10 km |
| Jun 4, 2014 | 3 km ESE of Fairfield Bay, Arkansas | M3.8 | 119 km | 0 km |
| Aug 16, 2003 | 5 km W of Thomasville, Missouri | M3.7 | 37 km | 0 km |
| Sep 12, 2019 | 13 km N of Big Flat, Arkansas | M3.7 | 68 km | 18 km |
| Sep 22, 2011 | 6 km E of Grandin, Missouri | M3.6 | 110 km | 11 km |
| Jun 11, 2017 | 6 km NNE of Bergman, Arkansas | M3.6 | 96 km | 6 km |
| Nov 15, 1990 | 16 km NNW of Hector, Arkansas | M3.5 | 150 km | 29 km |
| Aug 20, 1994 | 4 km NE of Black Rock, Arkansas | M3.5 | 97 km | 10 km |
| Jun 27, 2000 | 15 km WSW of Marshall, Arkansas | M3.4 | 114 km | 0 km |
| Jan 20, 2010 | 4 km WNW of Lynn, Arkansas | M3.3 | 90 km | 0 km |
| Oct 5, 2011 | 5 km WSW of Quitman, Arkansas | M3.3 | 143 km | 5 km |
| Feb 24, 2011 | 2 km NE of Guy, Arkansas | M3.2 | 147 km | 5 km |
| Aug 21, 2022 | 4 km SSW of Imboden, Arkansas | M3.1 | 85 km | 16 km |
| Oct 21, 1999 | 10 km NW of Maynard, Arkansas | M3.1 | 89 km | 9 km |
| Mar 18, 1990 | 9 km W of Alton, Missouri | M3.0 | 41 km | 1 km |
| Oct 10, 2010 | 0 km SSE of Guy, Arkansas | M3.0 | 149 km | 5 km |
| Jun 27, 2025 | 12 km WSW of Grandin, Missouri | M2.9 | 92 km | 10 km |
| May 21, 2013 | Arkansas | M2.9 | 96 km | 15 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
339 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 43 fatalities, 674 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 24, 2002 | EF4 | 94 km | 40.5 mi | 0 |
| Apr 14, 1996 | EF4 | 96 km | 44.0 mi | 7 |
| Dec 24, 1982 | EF4 | 59 km | 63.0 mi | 0 |
| Apr 2, 1982 | EF4 | 24 km | 20.0 mi | 2 |
| May 21, 1957 | EF4 | 79 km | 9.1 mi | 7 |
| Mar 25, 1954 | EF4 | 81 km | 12.1 mi | 2 |
| May 26, 2024 | EF3 | 46 km | 12.4 mi | 0 |
| May 26, 2024 | EF3 | 81 km | 34.6 mi | 1 |
| May 8, 2009 | EF3 | 28 km | 2.2 mi | 0 |
| Mar 1, 2007 | EF3 | 17 km | 15.0 mi | 1 |
| Apr 2, 2006 | EF3 | 100 km | 77.0 mi | 2 |
| Mar 5, 1996 | EF3 | 70 km | 46.5 mi | 0 |
| Nov 18, 1985 | EF3 | 81 km | 34.0 mi | 3 |
| Oct 18, 1984 | EF3 | 43 km | 26.0 mi | 1 |
| Dec 2, 1982 | EF3 | 59 km | 9.0 mi | 0 |
| Apr 2, 1982 | EF3 | 26 km | 1.5 mi | 2 |
| Apr 2, 1982 | EF3 | 99 km | 1.0 mi | 0 |
| Apr 11, 1979 | EF3 | 46 km | 35.4 mi | 0 |
| Apr 7, 1972 | EF3 | 100 km | 2.0 mi | 0 |
| Dec 14, 1971 | EF3 | 71 km | 23.6 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 | 77 km |
| 2007 | DEAD HORSE | 10,389 | 72 km |
| 2004 | LOWER WILD | 10,034 | 72 km |
| 2011 | UNNAMED | 9,641 | 81 km |
| 2022 | CEDAR BLUFF | 9,617 | 77 km |
| 2013 | LOWER WILDERNESS RX | 8,699 | 72 km |
| 2020 | BIG BARREN CREEK | 8,150 | 78 km |
| 2022 | STEGALL MOUNTAIN | 6,979 | 85 km |
| 2007 | UNNAMED | 6,931 | 77 km |
| 2021 | SYL BIRMINGHAM | 6,803 | 69 km |
| 2011 | UNNAMED | 6,686 | 76 km |
| 2010 | BRUSHY/CLAYTON | 6,401 | 77 km |
| 2020 | BIG CREEK | 6,399 | 76 km |
| 2015 | 15 STEGAL MOUNTAIN | 5,112 | 85 km |
| 2021 | ROCK PILE | 5,067 | 33 km |
| 2018 | UNNAMED | 4,873 | 70 km |
| 2024 | BRIDGES RX | 4,781 | 84 km |
| 2009 | STEGAL MTN. COMPLEX | 4,717 | 85 km |
| 2019 | UNNAMED | 4,493 | 69 km |
| 2014 | UNNAMED | 4,337 | 69 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (0°C) | 2.5 in | Coldest, Driest |
| February | 38°F (4°C) | 2.9 in | |
| March | 47°F (8°C) | 4.5 in | |
| April | 57°F (14°C) | 4.3 in | |
| May | 65°F (18°C) | 4.7 in | Wettest |
| June | 73°F (23°C) | 3.9 in | |
| July | 78°F (26°C) | 3.1 in | Warmest |
| August | 77°F (25°C) | 3.4 in | |
| September | 70°F (21°C) | 3.9 in | |
| October | 58°F (15°C) | 3.4 in | |
| November | 46°F (8°C) | 4.3 in | |
| December | 37°F (3°C) | 3.9 in |
South Fork has a seasonal temperature swing of 45°F / from 33°F in January to 78°F in July. Total annual precipitation is 44.8 inches, with May being the wettest month (4.7") and January the driest (2.5").