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Weather & Climate in Lenexa, KS
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Lenexa experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 29°F in January while summers reach 79°F in July. The area gets 293 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 40.7 inches. The area receives 13.8 inches of snow annually. Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 942 feet.
Temperature
29°F Jan (-2°C)
79°F Jul (26°C)
| Annual Average | 55.1°F |
| 2% above US avg | |
| January Average | 29°F (-2°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 942 ft (287 m) |
| Area | 34.4 sq mi (89.2 km²) |
| Population Density | 1,701/sq mi |
| Coordinates | 38.9653°N, 94.8039°W |
| Timezone | America/Chicago |
| County | Johnson County County |
| Nearest Airport | Lawrence Regional (LWC) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 94.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 75.3 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | No Rating |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively High |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively High |
| Winter Weather | Very High |
| Lightning | Very High |
| Ice Storm | Very High |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.3.
| May 18, 2005 | Missouri | M3.3 | 92 km | 5 km |
| Mar 23, 2007 | 5 km N of Nortonville, Kansas | M3.1 | 72 km | 5 km |
| May 13, 1999 | 6 km WSW of Kansas City, Kansas | M3.0 | 18 km | 5 km |
| Apr 4, 2015 | 3 km ESE of Clinton, Missouri | M2.6 | 114 km | 2 km |
| Jul 15, 2025 | 3 km W of Hale, Missouri | M2.5 | 141 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
605 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 91 fatalities, 1,087 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 8, 1966 | EF5 | 97 km | 21.1 mi | 16 |
| May 20, 1957 | EF5 | 83 km | 69.4 mi | 44 |
| May 28, 2019 | EF4 | 51 km | 29.1 mi | 0 |
| Feb 28, 2007 | EF4 | 96 km | 28.0 mi | 0 |
| May 4, 2003 | EF4 | 12 km | 21.0 mi | 2 |
| May 4, 2003 | EF4 | 41 km | 5.0 mi | 0 |
| May 4, 1977 | EF4 | 52 km | 12.0 mi | 0 |
| May 4, 1977 | EF4 | 80 km | 48.6 mi | 0 |
| Jun 8, 1966 | EF4 | 40 km | 19.9 mi | 1 |
| May 7, 1961 | EF4 | 25 km | 26.2 mi | 0 |
| May 22, 1952 | EF4 | 36 km | 26.9 mi | 0 |
| Mar 6, 2017 | EF3 | 49 km | 17.7 mi | 0 |
| May 2, 2008 | EF3 | 45 km | 0.9 mi | 0 |
| May 29, 2004 | EF3 | 62 km | 7.0 mi | 0 |
| May 8, 2003 | EF3 | 93 km | 25.0 mi | 0 |
| Apr 26, 1984 | EF3 | 72 km | 32.0 mi | 0 |
| May 6, 1983 | EF3 | 93 km | 19.0 mi | 1 |
| Jun 19, 1981 | EF3 | 40 km | 7.7 mi | 1 |
| May 4, 1977 | EF3 | 64 km | 29.8 mi | 2 |
| May 4, 1977 | EF3 | 77 km | 26.2 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
3 wildfires (100+ acres) recorded within 100 km. Largest: NR STEELE (1,652 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | NR STEELE | 1,652 | 84 km |
| 1994 | UNNAMED | 1,097 | 83 km |
| 2021 | CRAWFORD | 1,015 | 97 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 1.2 in | Coldest, Driest |
| February | 34°F (1°C) | 1.3 in | |
| March | 45°F (7°C) | 2.6 in | |
| April | 55°F (13°C) | 3.8 in | |
| May | 65°F (18°C) | 5.3 in | Wettest |
| June | 74°F (23°C) | 5.3 in | |
| July | 79°F (26°C) | 3.9 in | Warmest |
| August | 77°F (25°C) | 3.7 in | |
| September | 69°F (21°C) | 4.9 in | |
| October | 57°F (14°C) | 3.5 in | |
| November | 44°F (6°C) | 2.8 in | |
| December | 33°F (0°C) | 1.7 in |
Lenexa has a seasonal temperature swing of 50°F / from 29°F in January to 79°F in July. Total annual precipitation is 40.1 inches, with May being the wettest month (5.3") and January the driest (1.2").