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Weather & Climate in Armstrong, OK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Armstrong enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 42°F in January while summers reach 83°F in July. The area gets 310 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 44.4 inches. The area receives 2.0 inches of snow annually. Air quality is rated Good with a median AQI of 45. The city sits at an elevation of 586 feet.
Temperature
42°F Jan (6°C)
83°F Jul (28°C)
| Annual Average | 62.9°F |
| 16% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 310 days/yr |
Geography
| Elevation | 586 ft (179 m) |
| Area | 0.1 sq mi (0.2 km²) |
| Population Density | 1,422/sq mi |
| Coordinates | 34.0528°N, 96.3448°W |
| Timezone | America/Chicago |
| County | Marshall County County |
| Nearest Airport | Durant Regional/Eaker Field (DUA) 8 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 49.0 / 100 |
| Social Vulnerability | 92.5 / 100 |
| Community Resilience | 10.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
262 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Sep 6, 1997 | 6 km N of Tupelo, Oklahoma | M4.5 | 68 km | 5 km |
| Jan 18, 1995 | 4 km SSE of Erin Springs, Oklahoma | M4.2 | 140 km | 5 km |
| Apr 3, 2012 | 8 km SSW of Pittsburg, Oklahoma | M4.1 | 78 km | 5 km |
| Nov 15, 1990 | 5 km SSE of Erin Springs, Oklahoma | M3.9 | 139 km | 5 km |
| Aug 24, 2021 | 1 km S of Quinton, Oklahoma | M3.7 | 148 km | 7 km |
| Sep 25, 2023 | 9 km WNW of Velma, Oklahoma | M3.7 | 140 km | 20 km |
| Apr 7, 2021 | 7 km WSW of Horntown, Oklahoma | M3.6 | 112 km | 29 km |
| Jan 7, 2015 | 6 km NE of Irving, Texas | M3.6 | 143 km | 5 km |
| Dec 17, 1992 | 7 km SSE of Erin Springs, Oklahoma | M3.6 | 137 km | 5 km |
| Mar 4, 2013 | 5 km S of Tishomingo, Oklahoma | M3.5 | 35 km | 5 km |
| Jul 24, 2013 | 4 km NNW of Cromwell, Oklahoma | M3.5 | 147 km | 9 km |
| Aug 18, 2014 | 4 km NW of Cromwell, Oklahoma | M3.5 | 147 km | 5 km |
| Jan 6, 2015 | 4 km ENE of Irving, Texas | M3.5 | 145 km | 6 km |
| Jan 4, 2013 | 6 km NW of Cromwell, Oklahoma | M3.5 | 148 km | 5 km |
| Jun 8, 2004 | 6 km N of Lone Grove, Oklahoma | M3.5 | 86 km | 5 km |
| Apr 28, 2013 | 4 km NNW of Oakland, Oklahoma | M3.5 | 44 km | 5 km |
| Oct 20, 2002 | 8 km WSW of Lane, Oklahoma | M3.4 | 35 km | 5 km |
| Sep 30, 2012 | 4 km NW of Irving, Texas | M3.4 | 147 km | 5 km |
| Aug 7, 2024 | 9 km N of Stonewall, Oklahoma | M3.4 | 78 km | 27 km |
| Sep 9, 2012 | 8 km WNW of Cromwell, Oklahoma | M3.4 | 148 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
649 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 51 fatalities, 735 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 2, 1982 | EF5 | 72 km | 53.0 mi | 0 |
| Apr 27, 2024 | EF4 | 75 km | 26.8 mi | 1 |
| Nov 4, 2022 | EF4 | 75 km | 44.7 mi | 0 |
| May 11, 1992 | EF4 | 86 km | 10.0 mi | 0 |
| Apr 2, 1982 | EF4 | 80 km | 23.0 mi | 10 |
| May 13, 1981 | EF4 | 67 km | 8.8 mi | 0 |
| Apr 27, 1966 | EF4 | 34 km | 10.2 mi | 0 |
| May 4, 1960 | EF4 | 60 km | 30.8 mi | 0 |
| May 9, 1959 | EF4 | 67 km | 6.2 mi | 7 |
| Apr 2, 1957 | EF4 | 29 km | 5.2 mi | 2 |
| Apr 2, 1957 | EF4 | 16 km | 7.9 mi | 3 |
| May 25, 2024 | EF3 | 87 km | 0.7 mi | 0 |
| Apr 27, 2024 | EF3 | 76 km | 9.9 mi | 1 |
| Apr 30, 2019 | EF3 | 16 km | 27.6 mi | 2 |
| May 9, 2016 | EF3 | 34 km | 13.8 mi | 0 |
| May 9, 2016 | EF3 | 46 km | 9.1 mi | 1 |
| May 9, 2016 | EF3 | 93 km | 16.6 mi | 0 |
| May 25, 2015 | EF3 | 11 km | 18.8 mi | 1 |
| Apr 14, 2011 | EF3 | 28 km | 17.0 mi | 2 |
| May 10, 2010 | EF3 | 92 km | 4.9 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: ARBUCKLE (29,823 acres, 1991).
| Year | Name | Acres Burned | Distance |
| 1991 | ARBUCKLE | 29,823 | 83 km |
| 2021 | WINDMILL | 28,410 | 93 km |
| 2009 | BRUSHY MOUNTAIN | 18,412 | 89 km |
| 2011 | UNNAMED | 17,973 | 79 km |
| 2005 | UNNAMED | 15,416 | 99 km |
| 2004 | UNNAMED | 12,163 | 70 km |
| 2005 | UNNAMED | 10,935 | 50 km |
| 2000 | UNNAMED | 9,943 | 86 km |
| 2007 | EASY TO HANDLE | 9,120 | 88 km |
| 2011 | UNNAMED | 8,795 | 89 km |
| 2017 | CHOCKIE FIRE | 8,574 | 73 km |
| 2005 | PINE SPRINGS | 7,709 | 63 km |
| 2009 | BULL | 7,241 | 96 km |
| 1988 | UNNAMED | 7,228 | 78 km |
| 2006 | MILL CREEK | 6,577 | 55 km |
| 2011 | MAIN STREET | 6,024 | 96 km |
| 1996 | TURNPIKE MVD | 5,912 | 72 km |
| 1991 | UNNAMED | 5,867 | 95 km |
| 2005 | CALLISBURG | 5,797 | 75 km |
| 2004 | UNNAMED | 5,746 | 98 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 1.8 in | Coldest, Driest |
| February | 45°F (7°C) | 2.6 in | |
| March | 54°F (12°C) | 3.5 in | |
| April | 62°F (17°C) | 3.8 in | |
| May | 70°F (21°C) | 5.4 in | Wettest |
| June | 78°F (25°C) | 4.4 in | |
| July | 83°F (28°C) | 2.6 in | Warmest |
| August | 82°F (28°C) | 2.5 in | |
| September | 75°F (24°C) | 4.8 in | |
| October | 64°F (18°C) | 4.3 in | |
| November | 52°F (11°C) | 3.1 in | |
| December | 44°F (6°C) | 2.3 in |
Armstrong has a seasonal temperature swing of 41°F / from 42°F in January to 83°F in July. Total annual precipitation is 41.0 inches, with May being the wettest month (5.4") and January the driest (1.8").