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Weather & Climate in Knoxville, AR
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Knoxville enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 40°F in January while summers reach 82°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 49.5 inches (wetter than the 38-inch national average). The area receives 3.1 inches of snow annually. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 382 feet.
Temperature
40°F Jan (5°C)
82°F Jul (28°C)
| Annual Average | 61.8°F |
| 14% above US avg | |
| January Average | 40°F (5°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 310 days/yr |
Geography
| Elevation | 382 ft (116 m) |
| Area | 3.3 sq mi (8.4 km²) |
| Population Density | 195/sq mi |
| Coordinates | 35.3775°N, 93.3618°W |
| Timezone | America/Chicago |
| County | Johnson County County |
| Nearest Airport | Fort Smith Regional (FSM) 59 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 58.1 / 100 |
| Social Vulnerability | 79.3 / 100 |
| Community Resilience | 19.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
237 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Feb 28, 2011 | 4 km NE of Greenbrier, Arkansas | M4.7 | 92 km | 3 km |
| May 4, 2001 | 8 km NNW of Holland, Arkansas | M4.3 | 98 km | 8 km |
| Feb 18, 2011 | 4 km NNE of Greenbrier, Arkansas | M4.1 | 90 km | 6 km |
| Apr 8, 2011 | 3 km NE of Greenbrier, Arkansas | M3.9 | 92 km | 6 km |
| Feb 18, 2011 | 3 km NNE of Greenbrier, Arkansas | M3.9 | 91 km | 5 km |
| Jun 4, 2014 | 3 km ESE of Fairfield Bay, Arkansas | M3.8 | 104 km | 0 km |
| Feb 17, 2011 | 4 km NNE of Greenbrier, Arkansas | M3.8 | 92 km | 6 km |
| Apr 7, 2011 | 2 km NE of Greenbrier, Arkansas | M3.7 | 91 km | 6 km |
| Sep 12, 2019 | 13 km N of Big Flat, Arkansas | M3.7 | 120 km | 18 km |
| Feb 28, 2011 | 4 km NNE of Greenbrier, Arkansas | M3.6 | 90 km | 4 km |
| Jun 11, 2017 | 6 km NNE of Bergman, Arkansas | M3.6 | 116 km | 6 km |
| Feb 20, 2011 | 3 km NNE of Greenbrier, Arkansas | M3.6 | 91 km | 5 km |
| Apr 8, 2011 | 2 km NNE of Greenbrier, Arkansas | M3.5 | 90 km | 6 km |
| Feb 25, 2011 | 4 km NNE of Greenbrier, Arkansas | M3.5 | 90 km | 6 km |
| Mar 3, 2011 | 0 km N of Greenbrier, Arkansas | M3.5 | 90 km | 7 km |
| Feb 16, 2011 | 4 km NNE of Greenbrier, Arkansas | M3.5 | 92 km | 7 km |
| Nov 15, 1990 | 16 km NNW of Hector, Arkansas | M3.5 | 38 km | 29 km |
| Mar 9, 2011 | 1 km NW of Greenbrier, Arkansas | M3.5 | 89 km | 6 km |
| May 24, 2013 | 16 km WSW of Center Ridge, Arkansas | M3.4 | 59 km | 6 km |
| Feb 21, 2011 | 3 km N of Greenbrier, Arkansas | M3.4 | 90 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
437 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 93 fatalities, 1,557 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 27, 2014 | EF4 | 93 km | 41.1 mi | 16 |
| May 24, 2011 | EF4 | 55 km | 45.7 mi | 4 |
| Feb 5, 2008 | EF4 | 41 km | 121.8 mi | 13 |
| Mar 15, 1984 | EF4 | 86 km | 41.0 mi | 2 |
| Apr 19, 1968 | EF4 | 85 km | 2.0 mi | 14 |
| Apr 10, 1965 | EF4 | 91 km | 4.7 mi | 6 |
| May 26, 2024 | EF3 | 93 km | 21.6 mi | 4 |
| May 24, 2011 | EF3 | 16 km | 29.0 mi | 1 |
| Apr 25, 2011 | EF3 | 92 km | 16.8 mi | 1 |
| Apr 30, 2010 | EF3 | 54 km | 20.3 mi | 1 |
| May 2, 2008 | EF3 | 70 km | 45.3 mi | 5 |
| Nov 27, 2005 | EF3 | 64 km | 2.0 mi | 0 |
| Nov 27, 2005 | EF3 | 73 km | 19.0 mi | 0 |
| Nov 27, 2005 | EF3 | 65 km | 15.0 mi | 1 |
| May 4, 2003 | EF3 | 99 km | 34.9 mi | 0 |
| Dec 18, 2002 | EF3 | 100 km | 9.8 mi | 1 |
| Mar 5, 1999 | EF3 | 68 km | 10.0 mi | 0 |
| Apr 21, 1996 | EF3 | 57 km | 15.0 mi | 2 |
| Apr 21, 1996 | EF3 | 99 km | 10.1 mi | 2 |
| Nov 15, 1988 | EF3 | 70 km | 29.0 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (15,318 acres, 2000).
| Year | Name | Acres Burned | Distance |
| 2000 | UNNAMED | 15,318 | 67 km |
| 2007 | UNNAMED | 14,993 | 33 km |
| 2007 | UNNAMED | 14,774 | 59 km |
| 1998 | UNNAMED | 13,929 | 69 km |
| 2016 | UNNAMED | 11,929 | 69 km |
| 2024 | RX FOUCHE VALLEY | 10,912 | 53 km |
| 2003 | UNNAMED | 9,749 | 79 km |
| 2016 | UNNAMED | 9,483 | 75 km |
| 2013 | UNNAMED | 9,385 | 69 km |
| 2014 | UNNAMED | 9,368 | 33 km |
| 2018 | UNNAMED | 9,226 | 56 km |
| 2013 | UNNAMED | 8,607 | 58 km |
| 2003 | UNNAMED | 8,286 | 55 km |
| 2014 | UNNAMED | 7,945 | 66 km |
| 2016 | UNNAMED | 7,919 | 52 km |
| 2013 | UNNAMED | 7,804 | 52 km |
| 2003 | UNNAMED | 7,415 | 66 km |
| 2003 | UNNAMED | 7,347 | 67 km |
| 2019 | UNNAMED | 7,344 | 52 km |
| 2007 | UNNAMED | 6,804 | 72 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 2.5 in | Coldest, Driest |
| February | 43°F (6°C) | 3.1 in | |
| March | 51°F (11°C) | 4.6 in | |
| April | 60°F (16°C) | 4.2 in | |
| May | 68°F (20°C) | 5.4 in | Wettest |
| June | 76°F (24°C) | 4.0 in | |
| July | 82°F (28°C) | 3.2 in | Warmest |
| August | 80°F (27°C) | 3.0 in | |
| September | 73°F (23°C) | 3.9 in | |
| October | 62°F (16°C) | 3.9 in | |
| November | 50°F (10°C) | 4.5 in | |
| December | 41°F (5°C) | 4.1 in |
Knoxville has a seasonal temperature swing of 42°F / from 40°F in January to 82°F in July. Total annual precipitation is 46.3 inches, with May being the wettest month (5.4") and January the driest (2.5").