Climateby Month

Olathe, KS climate by month

NOAA 1991-2020 normals · 1,035 ft elevation

Olathe has hot and oppressively humid summers and cold winters. Highs peak at 88°F in July and fall to 39°F in January. The wettest month is May (about 11 wet days) and the driest is February (about 5). Normal snowfall is about 17 in a year. By our comfort score the best months are April and May.

Warmest month
88°F
July normal high
Coldest month
21°F
January normal low
Wet days a year
91
40.5 in of precipitation
Snow a year
17.4 in
normal snowfall

How warm is Olathe?

Normal highs range from 39°F in January to 88°F in July.

20°40°60°80°100° January: normal high 39°F (4°C), low 21°F (-6°C) 39° 21° February: normal high 44°F (7°C), low 25°F (-4°C) March: normal high 55°F (13°C), low 35°F (2°C) April: normal high 65°F (18°C), low 45°F (7°C) May: normal high 74°F (23°C), low 55°F (13°C) June: normal high 83°F (28°C), low 65°F (18°C) July: normal high 88°F (31°C), low 69°F (21°C) 88° 69° August: normal high 87°F (31°C), low 67°F (19°C) September: normal high 78°F (26°C), low 59°F (15°C) October: normal high 67°F (19°C), low 47°F (8°C) November: normal high 53°F (12°C), low 35°F (2°C) December: normal high 42°F (6°C), low 25°F (-4°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Olathe?

May has the most wet days (about 11); the year brings about 41 in of precipitation.

January: 6 wet days February: 5 wet days 5 March: 8 wet days April: 9 wet days May: 11 wet days 11 June: 9 wet days July: 8 wet days August: 8 wet days September: 8 wet days October: 7 wet days November: 6 wet days December: 6 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 17.4 in a year, most of it in February.

January: 5.0 in of snow February: 5.1 in of snow 5.1 March: 1.5 in of snow April: 0.1 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.3 in of snow November: 1.1 in of snow December: 4.3 in of snow JFMAMJJASOND

How humid is Olathe?

Muggy days peak in July, at about 21 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 3 muggy days June: 15 muggy days July: 21 muggy days 21 August: 19 muggy days September: 8 muggy days October: 1 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at New Century Aircenter Arpt, 5.6 mi SW of the city center.

How much daylight?

Daylight ranges from about 9.5 hours in December to 14.9 hours in June.

January: 9.8 hours of daylight February: 10.8 hours of daylight March: 12.0 hours of daylight April: 13.2 hours of daylight May: 14.3 hours of daylight June: 14.8 hours of daylight 14.8 July: 14.6 hours of daylight August: 13.6 hours of daylight September: 12.4 hours of daylight October: 11.2 hours of daylight November: 10.1 hours of daylight December: 9.5 hours of daylight 9.5 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Olathe, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 39°F21°F 1.2 in6 5.0 in 0 9.8 h
February 44°F25°F 1.6 in5 5.1 in 0 10.8 h
March 55°F35°F 2.5 in8 1.5 in 0 12.0 h
April 65°F45°F 4.0 in9 0.1 in 0 13.2 h
May 74°F55°F 5.2 in11 0.0 in 3 14.3 h
June 83°F65°F 5.5 in9 0.0 in 15 14.8 h
July 88°F69°F 4.5 in8 0.0 in 21 14.6 h
August 87°F67°F 4.5 in8 0.0 in 19 13.6 h
September 78°F59°F 4.3 in8 0.0 in 8 12.4 h
October 67°F47°F 3.4 in7 0.3 in 1 11.2 h
November 53°F35°F 2.2 in6 1.1 in 0 10.1 h
December 42°F25°F 1.6 in6 4.3 in 0 9.5 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Olathe

By our comfort score, the best months are April and May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 351317
Feb 412412
Mar 56854
Apr 701571
May 691491
Jun 56475
Jul 481613
Aug 472612
Sep 621263
Oct 641450
Nov 50644
Dec 371313

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Olathe

The last spring frost typically comes around Apr 8, and the first fall frost around Oct 29, leaving 204 frost-free days in a typical year.

Frost and freeze dates for Olathe
Typical date1 year in 10
Last spring frost (32°F)Apr 8after Apr 23
First fall frost (32°F)Oct 29before Oct 15
Last hard freeze (28°F)Mar 30after Apr 13
First hard freeze (28°F)Nov 6before Oct 25
Frost-free season204 daysunder 184 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Olathe Johnson Co Exec Airport (USW00003967), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Kansas.

Hottest and coldest readings, 1991-2020

The highest reading was 110°F (August 2, 2011); the lowest was -10°F (January 28, 1997).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Olathe

Similar climates elsewhere

Where the numbers come from

  • Temperature and frost dates: Olathe Johnson Co Exec Airport (USW00003967), 4.8 mi ESE of the city center, 1,070 ft . NOAA normals and daily records, 1991-2020.
  • Rain, snowfall and snow depth: Bonner Springs (USC00140957), 13 mi NNW of the city center, 850 ft (185 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour and cloud cover: Kansas City Downtown Airport (USW00013988), 20 mi NE of the city center, 742 ft (293 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: New Century Aircenter Arpt (724475-93909), 5.6 mi SW of the city center, 1,055 ft . Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error