Lenexa, Kansas Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Lenexa weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast19%—85°67°—
- FridayJun 5Thunderstorm58%0.10″91°71°+6°
- SaturdayJun 6Thunderstorm12%—85°68°-6°
- SundayJun 7Showers69%0.15″79°67°-6°
- MondayJun 8Thunderstorm52%—89°68°+10°
- TuesdayJun 9Thunderstorm36%—90°74°+1°
- WednesdayJun 10Thunderstorm——89°73°-1°
Ozone at AQI 60 — peak already passed at 1 PM under partly cloudy skies. AQI up 14 over the last 6 hours (gradual rise). Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 60 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 60
- UV peak
- 6.0 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 60
PM × Wind × Precip
PM2.5 at 11.9 µg/m³, PM10 at 13.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.88
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:45 AM
- Moonset
- 2:25 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Lenexa at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 10 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Lenexa
SPC has placed Lenexa in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Lenexa's warmest month is July (~78°F mean) and its coldest is January (~30°F). Rainfall peaks in May (5.4 inches) and bottoms out in January (1.1 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 30° | 1.1″ | 2 |
| February | 35° | 1.4″ | 3 |
| March | 45° | 2.3″ | 5 |
| April | 55° | 3.9″ | 7 |
| May | 65° | 5.4″ | 8 |
| June | 74° | 5.2″ | 7 |
| July | 78° | 4.2″ | 5 |
| August | 77° | 4.4″ | 5 |
| September | 68° | 3.5″ | 5 |
| October | 57° | 3.0″ | 6 |
| November | 44° | 2.0″ | 3 |
| December | 34° | 1.4″ | 2 |
Regional context
Lenexa sits within a humid subtropical climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Wichita, KS, Overland Park, KS, Kansas City, KS, Topeka, KS, Olathe, KS.
Frequently asked
- When does it freeze in Lenexa?
- Lenexa's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Lenexa?
- May is the wettest month with about 5.4 inches of rain on average; the city receives roughly 38 inches annually.
- What is the warmest month in Lenexa?
- July is typically warmest, averaging about 78°F.
- What is the coldest month in Lenexa?
- January is typically coldest, averaging about 30°F.
- When can I start a vegetable garden in Lenexa?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Lenexa get?
- Lenexa averages about 59 rainy days per year.
- What hardiness zone is Lenexa?
- Lenexa's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Lenexa, Kansas sits in a humid subtropical climate zone. January means hover near 30°F while July averages 78°F — a 48°F seasonal swing.
Across the year, Lenexa receives about 38 inches of precipitation spread over roughly 59 rainy days.
The rhythm of the year is set by latitude (39.0°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.