Climate and monthly weather forecast
Olathe, KS

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The climate of Olathe

Olathe, Kansas, USA, is situated in a zone ascribed as a Humid subtropical climate by the Köppen climate classification. Labelled as Cfa, this distinct climate implies that the region experiences no dry season, with rainfall occurring throughout the year. The monthly average temperatures in Olathe range from 23°F (-5°C) to 69.3°F (20.7°C), with highs reaching from 37.6°F (3.1°C) in the coldest months to 87.1°F (30.6°C) during the hottest period.

This remarkable variation in temperature is typical of a subtropical climate and allows for the copious biodiversity found in this region. Relative humidity levels stay relatively constant throughout the year, with an average ranging from 70 to 79%. Rainfall fluctuates significantly from 1.06" (27mm) to 4.69" (119mm) per month. The year sees an average of 100 days of rain and 16.2" (411mm) of annual snowfall that occurs predominantly between December and February.

Olathe also experiences noticeable shifts in daylight hours, from a low of 9.8 hours in the shorter winter days up to 14.9 hours during the summer. This variation impacts the amount of sunshine the city receives ranging from 5.3 hours to 10.5 hours which corresponds to roughly one-half to two-thirds of the available daylight hours.

The best time to visit Olathe

The perfect time to visit Olathe is from May through to mid-October when the highest temperatures are experienced. The average high temperature hovers from 72.9°F (22.7°C) to 87.1°F (30.6°C) during this time, making outdoor activities pleasant and enjoyable. Although rainfall is higher during May and June, the copious daylight hours and longer sunshine duration compensates for the increased precipitation.

The worst time to visit Olathe

The least ideal time to visit Olathe would be from late November to early March. The cold weather sets in, and the average high temperature drops to between 37.6°F (3.1°C) and 54.7°F (12.6°C). Snow is also most likely during this period, with December experiencing 2.36" (60mm) of snowfall on average. The shorter daylight hours and reduced sunshine during these winter months add to the cold and gloomy atmosphere.

Spring weather in Olathe

Spring in Olathe begins in March and typically lasts until May. The average low temperature during the spring months is usually between 37.9°F (3.3°C) and 55.9°F (13.3°C), while high temperatures range from 54.7°F (12.6°C) to 72.9°F (22.7°C). Relative humidity during this period mostly remains constant around 73 to 79%, while rainfall increases from an average of 2.36" (60mm) in March to its peak of 4.69" (119mm) in May.

Summer weather in Olathe

The summer season lasts from June through August with average temperatures swing between 66°F (18.9°C) and 83.7°F (28.7°C). Relative humidity during the summer averages at 78%, and there is a decreased amount of rainfall, from 2.95" (75mm) at the start of the season to 2.87" (73mm) in July. Olathe summer days are characterised by long daylight hours, reaching up to 14.9 hours, with maximum sunshine reached at 10.5 hours in June and July.

Autumn weather in Olathe

Autumn in Olathe begins in September and continues until November. During this season, low temperatures hover from 48.4°F (9.1°C) and 59.5°F (15.3°C) while high temperatures decrease from 78.3°F (25.7°C) to 53.2°F (11.8°C). Rainfall lessens, tapering from 2.6" (66mm) in September to 1.26" (32mm) in November. The daylight hours also decrease from 12.4 hours in September to 10.1 hours in November.

Winter weather in Olathe

December marks the beginning of winter in Olathe, which lasts until February. During this time, low temperatures can drop to between 23°F (-5°C) and 27.1°F (-2.7°C), while high temperatures usually only reach from 37.6°F (3.1°C) to 41.5°F (5.3°C). Snowfall occurs predominantly in these months, reaching an average of 3.78" (96mm) in January. December holds the shortest daylight hours of 9.8 hours and provides a mere 5.3 hours of sunshine.

Weather in January

January is characterized by chilly weather in Olathe, Kansas with frequent snowfall. Gradually, it gets colder and colder from December's mild conditions. A notable feature in January is that it experiences one of the lowest average temperatures, from 23°F (-5°C) to 37.6°F (3.1°C), and the city sees up to 2.36" (60mm) of snowfall on an average. Weather in January »

Weather in February

February continues the cold spell from January but brings a slight rise in temperatures, signaling the transition towards spring. The Olathe weather remains vibrant with the onset of longer daylight hours. Comparatively, February experiences higher snowfall, with an average of 3.78" (96mm) increasing from the previous month. Weather in February »

Weather in March

The city of Olathe welcomes spring with the weather in March. As winter transitions into spring, there is a significant increase in average temperatures, with highs reaching 54.7°F (12.6°C) and lows around 37.9°F (3.3°C). This shift in weather marks a decrease in snowfall, replaced by rainfall, which is more than double from the previous month, averaging at 2.36" (60mm). Weather in March »

Weather in April

April sees further improvement in weather conditions from March in Olathe, offering warmer and longer days. The rise in temperature, combined with generous amounts of rainfall, creates an ideal environment for flora and fauna to thrive. Weather in April »

Weather in May

May marks a transition from the delightful spring season to the beginning of summer in Olathe. The city is often filled with joy and celebration as the weather becomes more conducive for outdoor activities. The significant weather note for May is the heaviest rainfall, averaging at 4.69" (119mm), causing a blossoming of the city's flora. Weather in May »

Weather in June

The arrival of June brings the warm summer season to Olathe, Kansas. Following from May's hint, temperatures reach their summer highs, and the city experiences vibrancy through long, sunny days. Despite the peak temperatures, June's average relative humidity of 78% ensures a comfortable atmosphere. Weather in June »

Weather in July

July is recognized as the hottest month in Olathe, with temperatures reaching their maximum at 87.1°F (30.6°C). As the city endures the heat, daylight hours are at their longest, and the sun shines brightest. The average relative humidity dips slightly from June to 75%, providing some respite from the intense heat. Weather in July »

Weather in August

August continues the summer season, with the weather in Olathe, Kansas remaining warm from July. However, a slight drop in temperature and the increase in rainfall as compared to the preceding month brings relief to the city's dwellers. Weather in August »

Weather in September

September initiates the transition to fall in Olathe. A notable drop in temperature from the summer months brings cooler and more comfortable days. Despite the shift, September enjoys a fair amount of sunlight with 9.3 daily sunshine hours. Weather in September »

Weather in October

October in Olathe welcomes the fall season in full swing. Following the weather transformation in September, October days are significantly cooler and shorter. The month proves a break from the high temperatures of the previous months, offering a crisp atmosphere for enjoying the autumn foliage. Weather in October »

Weather in November

November in Olathe marks the onset of the winter season, with a significant drop in temperatures from the fall of October. The weather offers a stark contrast to the warm and sunny days of previous months. Though less frequent, the city experiences its first snowfall of the season with an average of 0.35" (9mm). Weather in November »

Weather in December

December brings the full effect of winter to Olathe, Kansas. The month starts with a continuation of November's cold conditions and sees a further decrease in temperatures. Snow becomes more frequent, with average snowfall reaching 1.14" (29mm). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest in Olathe?

January, noted for its average high-temperature of 37.6°F (3.1°C) and an average low-temperature of 23°F (-5°C), is considered the coldest month in Olathe, Kansas.

What is the driest month in Olathe?

The month with the least rainfall in Olathe, Kansas, is January, when the rain falls for 6.1 days and typically collects 1.06" (27mm) of precipitation.

How many days does it rain in Olathe?

Throughout the year, in Olathe, there are 137 rainfall days, and 28.7" (729mm) of precipitation is accumulated.

When does it snow in Olathe?

January through May, October through December are months with snowfall in Olathe.

How much does it snow in Olathe?

Throughout the year, in Olathe, Kansas, there are 20.8 snowfall days, and 9.61" (244mm) of snow is accumulated.

What is the month with the least sunshine in Olathe?

January has the least sunshine of the year, with an average of 5.3h of sunshine.

When is the lowest UV index in Olathe?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

When does it snow the most in Olathe?

The month with the most snowfall in Olathe, Kansas, is February, when snow falls for 6.7 days and typically aggregates up to 3.78" (96mm) of snow.

When is Daylight Saving Time (DST) in Olathe?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Olathe, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

What is the most humid month in Olathe?

May is the most humid month in Olathe, with an average relative humidity of 79%.

What is the wettest month in Olathe?

The month with the most rainfall is May, when the rain falls for 17.9 days and typically aggregates up to 4.69" (119mm) of precipitation.

What are the months with the highest UV index in Olathe?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Olathe.

When it does not snow in Olathe?

In Olathe, snow does not fall in June through September.

When are the longest days in Olathe?

The month with the longest days in Olathe, Kansas, is June, with an average of 14h and 48min of daylight.

What are the months with the most sunshine in Olathe?

The months with the most sunshine in Olathe are June and July, with an average of 10.5h of sunshine.

What month is the hottest in Olathe?

July, with its average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 69.3°F (20.7°C), holds the record as the warmest month.

What are the least humid months in Olathe?

October and November, with an average relative humidity of 70%, are the least humid months.

What is the month with the shortest days in Olathe?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Olathe, Kansas.

Average temperature
Olathe, KS

Average temperature - Olathe, KS

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.6°F).

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average pressure
Olathe, KS

Average pressure - Olathe, KS

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed
Olathe, KS

Average wind speed - Olathe, KS

The windiest month (with the highest average wind speed) is March (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity
Olathe, KS

Average humidity - Olathe, KS

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are October and November (70%).

Average rainfall
Olathe, KS

Average rainfall - Olathe, KS

The wettest month (with the highest rainfall) is May (4.69").
The driest month (with the least rainfall) is January (1.06").

Average rainfall days
Olathe, KS

Average rainfall days - Olathe, KS

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (5.8 days).

Average snowfall
Olathe, KS

Average snowfall - Olathe, KS

The month with the highest snowfall is February (3.78").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Olathe, KS

Average snowfall days - Olathe, KS

The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Olathe, KS

Average daylight / Average sunshine - Olathe, KS

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

Average sunshine days
Olathe, KS

Average sunshine days - Olathe, KS

The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is May (11.2 days).

Average UV index
Olathe, KS

Average UV index - Olathe, KS

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average visibility
Olathe, KS

Average visibility - Olathe, KS

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Olathe, Kansas, USA

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