Olathe, Kansas Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Olathe weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——82°66°—
- ThursdayJun 4Light Drizzle28%0.01″82°67°0°
- FridayJun 5Heavy Drizzle31%0.04″87°70°+5°
- SaturdayJun 6Drizzle31%—85°69°-2°
- SundayJun 7Light Showers64%—78°67°-7°
- MondayJun 8Thunderstorm51%0.17″83°67°+5°
- TuesdayJun 9Thunderstorm33%—87°71°+4°
Ozone at AQI 38. AQI flat over the last 6 hours (within ±3 points). Overcast through the UV peak window (cloud cover ~92%) — afternoon ozone should stay flat.
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 38. Overcast through the UV peak window (cloud cover ~92%) — afternoon ozone should stay flat.
- Present
- AQI 38
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
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
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Olathe at a glance
- Today vs. normal: 74°F — typical for the season
- Last frost: April 9 (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 — Olathe
SPC has placed Olathe in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3MRGLMarginal Risk
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
Olathe's warmest month is July with a mean temperature around 78°F, and its coldest is January at roughly 30°F. Rainfall peaks in May (5.4 inches) and reaches its low point 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
Olathe lies within a humid subtropical climate region — a cohort of nearby cities sharing similar temperature ranges, seasonal patterns, and growing conditions.
Similar climates: Wichita, KS, Overland Park, KS, Kansas City, KS, Topeka, KS, Lawrence, KS.
Naturalist notes
Eastern redbuds typically open their first pink blooms in Olathe during the second or third week of April, a visible marker that soil temperatures have crossed into consistent warming.
Common purple martin scouts usually appear over the area by late March, with active nest colonization underway by the last week of April.
Frequently asked
- When does it freeze in Olathe?
- Olathe's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Olathe?
- May is the wettest month, averaging about 5.4 inches of rain; the city receives roughly 38 inches per year.
- What is the warmest month in Olathe?
- July is typically warmest, averaging about 78°F.
- What is the coldest month in Olathe?
- January is typically coldest, averaging about 30°F.
- When can I start a vegetable garden in Olathe?
- Cool-season crops such as peas and lettuce can be sown near the last spring frost (mid-April); warm-season crops like tomatoes and peppers should wait until 1–2 weeks after that date.
- How many rainy days does Olathe get?
- Olathe averages about 59 rainy days per year.
- What hardiness zone is Olathe?
- Olathe's USDA hardiness zone is determined by its lowest average winter temperature; the current zone designation can be checked via the USDA's online lookup using the city ZIP code.
Climate
Olathe, Kansas has a humid subtropical climate. Average temperatures swing roughly 48°F between January (near 30°F) and July (about 78°F).
Total precipitation runs close to 38 inches annually, arriving across roughly 59 rainy days.
Latitude (38.9°N), distance from large water bodies, and elevation set the seasonal rhythm — influencing what can grow, when frost is likely, and the shape of daily weather patterns.