Today | Weather | Monday, April 27, 2026
Active Weather Warnings

Weather in Olathe, Kansas

08:51 AM
Now
Cloudy Weather
64° F
Feels Like 61°
Precipitation 38 %
Wind 15 mph
UV Index (0 - 11+) 1
Humidity 94 %
Today
Sunny with a Chance of Thunderstorms
Day 75°
Night 46°
Precipitation 49 %
Wind 16 mph
UV Index (0 - 11+) 3

Olathe Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 27, 2025)
Stormy Weather

Day

70°

Night

63°

Wind

11 mph

UV Index

2

Precipitation

40 %

Air Quality in Olathe

NOW
21 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.7 µg/m³
PM10 3.76 µg/m³
O3 0.023 ppm
NO2 1 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 1.24 µg/m³
NO 0.22 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.52.7 µg/m³
PM103.76 µg/m³
O344.74 µg/m³
NO21.9 µg/m³
SO20.64 µg/m³
CO132.25 µg/m³
NH31.24 µg/m³
NO0.22 µg/m³

Weather Alerts and Warnings for Olathe

Severe Future Possible

Severe Thunderstorm Watch

Severe Thunderstorm Watch issued April 27 at 3:48AM CDT until April 27 at 10:00AM CDT by NWS Kansas City/Pleasant Hill MO
Apr 27, 3:48 AM Apr 27, 10:00 AM
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
156 UNTIL 10 AM CDT THIS MORNING WHICH REPLACES A PORTION OF
SEVERE THUNDERSTORM WATCH 154. THE NEW WATCH IS VALID FOR THE
FOLLOWING AREAS

IN KANSAS THE NEW WATCH INCLUDES 5 COUNTIES

IN EAST CENTRAL KANSAS

JOHNSON LINN MIAMI

IN NORTHEAST KANSAS

LEAVENWORTH WYANDOTTE

IN MISSOURI THE NEW WATCH INCLUDES 14 COUNTIES

IN CENTRAL MISSOURI

PETTIS SALINE

IN NORTH CENTRAL MISSOURI

CARROLL

IN NORTHWEST MISSOURI

BUCHANAN CLINTON

IN WEST CENTRAL MISSOURI

BATES CASS CLAY
HENRY JACKSON JOHNSON
LAFAYETTE PLATTE RAY

THIS INCLUDES THE CITIES OF ADRIAN, BELTON, BUTLER, CAMERON,
CARROLLTON, CLINTON, CONCORDIA, EXCELSIOR SPRINGS,
FORT LEAVENWORTH, GLADSTONE, HARRISONVILLE, HIGGINSVILLE,
INDEPENDENCE, KANSAS CITY, KANSAS CITY KANSAS, KEARNEY, LA CYGNE,
LANSING, LATHROP, LAWSON, LEAVENWORTH, LENEXA, LEXINGTON,
LIBERTY, LOUISBURG, MARSHALL, MOUND CITY, ODESSA, OLATHE,
OSAWATOMIE, OVERLAND PARK, PAOLA, PARKVILLE, PLATTE CITY,
PLATTSBURG, PLEASANT HILL, PLEASANTON, RAYMORE, RICH HILL,
RICHMOND, RIVERSIDE, SEDALIA, SHAWNEE, ST. JOSEPH,
ST. JOSEPH AIRPORT, STANLEY, WARRENSBURG, WEATHERBY LAKE, WESTON,
AND WINDSOR.
Updated: Apr 27, 7:43 AM Source: NWS Alert
Severe Future Possible

Flood Watch

Flood Watch issued April 26 at 10:22PM CDT until April 27 at 7:00PM CDT by NWS Kansas City/Pleasant Hill MO
Apr 26, 10:22 PM Apr 27, 7:00 PM
WHAT: Flash flooding caused by excessive rainfall continues to be
possible.

WHERE: Portions of Kansas, including the following areas,
Atchison KS, Doniphan, Johnson KS, Leavenworth and Wyandotte and
Missouri, including the following areas, Andrew, Buchanan,
Caldwell, Carroll, Chariton, Clay, Clinton, Daviess, De Kalb,
Holt, Howard, Jackson, Lafayette, Linn MO, Livingston, Macon,
Platte, Randolph, Ray and Saline.

WHEN: Through Monday evening.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas.

ADDITIONAL DETAILS:
- Multiple rounds of heavy rainfall tonight through Monday.
- http://www.weather.gov/safety/flood
+ Read More
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Updated: Apr 27, 7:43 AM Source: NWS Alert
Minor Expected Likely

Flood Advisory

Flood Advisory issued April 27 at 5:27AM CDT until April 27 at 9:00AM CDT by NWS Kansas City/Pleasant Hill MO
Apr 27, 5:27 AM Apr 27, 9:00 AM
WHAT: Urban and small stream flooding caused by excessive
rainfall is expected.

WHERE: Johnson County in east central Kansas.

WHEN: Until 900 AM CDT.

IMPACTS: Minor flooding in low-lying and poor drainage areas.
Water over roadways.

ADDITIONAL DETAILS:
- At 526 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause urban and small stream
flooding. Up to 1 inch of rain has fallen.
- Additional rainfall amounts of 1 to 2 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Overland Park, Olathe, Shawnee, Lenexa, Leawood, Prairie
Village, Gardner, Merriam, De Soto, Spring Hill, Edgerton,
Clare, Lackmans, Stanley, Clearview City and Stilwell.
- http://www.weather.gov/safety/flood
+ Read More
Be aware of your surroundings and do not drive on flooded roads.
Updated: Apr 27, 7:43 AM Source: NWS Alert