Weather & Climate in Ironton, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ironton experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 31°F in January while summers reach 76°F in July. Annual precipitation totals 46.3 inches (wetter than the 38-inch national average). The area receives 9.3 inches of snow annually. The city sits at an elevation of 928 feet.
Temperature
31°F Jan (-0°C)
76°F Jul (25°C)
| Annual Average | 54.5°F |
| 1% above US avg | |
| January Average | 31°F (-0°C) |
| July Average | 76°F (25°C) |
Geography
| Elevation | 928 ft (283 m) |
| Area | 1.3 sq mi (3.5 km²) |
| Population Density | 1,310/sq mi |
| Coordinates | 37.5978°N, 90.6282°W |
| Timezone | America/Chicago |
| Nearest Airport | Farmington Regional (FAM) 19 miles away |
Precipitation & Snow
Air Quality
Earthquake History
154 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Sep 26, 1990 | 4 km SE of Chaffee, Missouri | M4.8 | 103 km | 1 km |
| May 4, 1991 | 2 km NNW of Risco, Missouri | M4.5 | 134 km | 11 km |
| Feb 5, 1994 | 2 km WNW of Dongola, Illinois | M4.2 | 130 km | 16 km |
| Jun 7, 2011 | 18 km NNW of Potosi, Missouri | M3.9 | 59 km | 21 km |
| Feb 21, 2012 | 4 km SSE of Bertrand, Missouri | M3.9 | 134 km | 8 km |
| Oct 21, 1999 | 9 km NW of Maynard, Arkansas | M3.9 | 128 km | 10 km |
| Aug 22, 2000 | 19 km WNW of Maynard, Arkansas | M3.9 | 132 km | 10 km |
| Jul 7, 1991 | 11 km ENE of Brandsville, Missouri | M3.9 | 131 km | 8 km |
| Mar 2, 2010 | 2 km ENE of East Prairie, Missouri | M3.7 | 144 km | 8 km |
| Aug 16, 2003 | 5 km W of Thomasville, Missouri | M3.7 | 124 km | 0 km |
| Sep 22, 2011 | 6 km E of Grandin, Missouri | M3.6 | 87 km | 11 km |
| Jun 15, 2004 | 3 km S of Canalou, Missouri | M3.5 | 128 km | 5 km |
| Aug 27, 1993 | 5 km SSE of Olympian Village, Missouri | M3.3 | 57 km | 22 km |
| Feb 6, 1993 | 6 km NNW of Catron, Missouri | M3.3 | 131 km | 8 km |
| Sep 27, 2019 | 4 km WSW of Howardville, Missouri | M3.3 | 145 km | 8 km |
| Nov 9, 1990 | 2 km NW of Marston, Missouri | M3.2 | 147 km | 10 km |
| Dec 27, 1992 | 2 km E of Pocahontas, Missouri | M3.2 | 90 km | 10 km |
| Apr 6, 1994 | 2 km NE of Tamaroa, Illinois | M3.2 | 139 km | 15 km |
| Feb 28, 2015 | 3 km NW of Marston, Missouri | M3.1 | 147 km | 13 km |
| Feb 10, 2023 | 7 km S of Catron, Missouri | M3.1 | 142 km | 7 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
449 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 55 fatalities, 551 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Feb 28, 2017 | EF4 | 57 km | 53.5 mi | 1 |
| Sep 22, 2006 | EF4 | 71 km | 27.5 mi | 0 |
| Apr 24, 2002 | EF4 | 75 km | 40.5 mi | 0 |
| Jun 22, 1969 | EF4 | 57 km | 20.2 mi | 2 |
| Jun 22, 1969 | EF4 | 16 km | 15.1 mi | 4 |
| Dec 21, 1967 | EF4 | 45 km | 27.9 mi | 3 |
| May 21, 1957 | EF4 | 87 km | 9.1 mi | 7 |
| Feb 24, 1956 | EF4 | 98 km | 77.6 mi | 6 |
| Oct 24, 2021 | EF3 | 23 km | 16.7 mi | 0 |
| Oct 24, 2021 | EF3 | 22 km | 18.8 mi | 0 |
| Feb 29, 2012 | EF3 | 87 km | 20.0 mi | 1 |
| May 25, 2011 | EF3 | 89 km | 47.4 mi | 0 |
| Mar 11, 2006 | EF3 | 64 km | 5.1 mi | 0 |
| Mar 11, 2006 | EF3 | 61 km | 53.5 mi | 2 |
| May 6, 2003 | EF3 | 88 km | 2.0 mi | 0 |
| Apr 27, 2002 | EF3 | 65 km | 4.0 mi | 1 |
| Apr 19, 1996 | EF3 | 68 km | 11.5 mi | 0 |
| May 29, 1982 | EF3 | 97 km | 10.0 mi | 0 |
| Apr 22, 1981 | EF3 | 66 km | 7.1 mi | 1 |
| Feb 21, 1976 | EF3 | 99 km | 23.7 mi | 1 |
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 | 94 km |
| 2011 | UNNAMED | 9,641 | 98 km |
| 2022 | CEDAR BLUFF | 9,617 | 96 km |
| 2020 | BIG BARREN CREEK | 8,150 | 91 km |
| 2022 | STEGALL MOUNTAIN | 6,979 | 76 km |
| 2010 | WYLIE KING 1 | 6,077 | 78 km |
| 2015 | 15 STEGAL MOUNTAIN | 5,112 | 76 km |
| 2011 | MINNINGHAW | 4,792 | 65 km |
| 2024 | BRIDGES RX | 4,781 | 98 km |
| 2009 | STEGAL MTN. COMPLEX | 4,717 | 76 km |
| 2017 | UNNAMED | 4,602 | 65 km |
| 2021 | MILLER KING | 4,130 | 76 km |
| 2022 | SMITH MILL HOLLOW | 3,978 | 52 km |
| 1999 | STEGALL99 | 3,415 | 77 km |
| 2013 | UNNAMED | 3,313 | 74 km |
| 2005 | UNNAMED | 3,252 | 66 km |
| 2021 | VICTORY 1-7 | 3,237 | 81 km |
| 1988 | HANES 1 | 3,139 | 97 km |
| 2021 | COUNCIL BLUFF | 3,035 | 30 km |
| 2011 | MUD POND | 3,030 | 93 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 3.0 in | Coldest |
| February | 35°F (2°C) | 2.8 in | Driest |
| March | 44°F (7°C) | 3.8 in | |
| April | 55°F (13°C) | 5.3 in | |
| May | 64°F (18°C) | 5.3 in | Wettest |
| June | 72°F (22°C) | 3.6 in | |
| July | 76°F (25°C) | 4.0 in | Warmest |
| August | 75°F (24°C) | 3.9 in | |
| September | 67°F (19°C) | 3.5 in | |
| October | 55°F (13°C) | 3.3 in | |
| November | 44°F (7°C) | 4.6 in | |
| December | 35°F (2°C) | 3.3 in |
Ironton has a seasonal temperature swing of 45°F / from 31°F in January to 76°F in July. Total annual precipitation is 46.3 inches, with May being the wettest month (5.3") and February the driest (2.8").