30-year climate normals

Cass County Climate and Weather Averages

Hottest month — July

88.3°

average daily high. The coldest month is January, averaging a low of 22.1°F.

Cass County gets 38.34" of precipitation a year, and 40% of it falls in May, Jun, Jul.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

Month	Avg high	Avg low	Precip
January	39.0°	22.1°	0.96"
February	44.3°	25.9°	1.43"
March	55.4°	35.4°	2.14"
April	65.5°	45.5°	4.19"
May	74.8°	55.9°	5.70"
June	84.0°	65.4°	4.95"
July	88.3°	69.7°	4.57"
August	86.9°	67.6°	4.54"
September	79.0°	59.0°	3.07"
October	67.1°	47.2°	3.39"
November	54.0°	36.2°	2.05"
December	43.2°	26.3°	1.35"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 40% falling in the wettest three months (May, Jun, Jul).

January 0.96"

February 1.43"

March 2.14"

April 4.19"

May 5.70"

June 4.95"

July 4.57"

August 4.54"

September 3.07"

October 3.39"

November 2.05"

December 1.35"

Annual total 38.34"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 1,446

Heating degree days How much heating the climate demands 4,786

Approximate annual cooling cost At 13.68¢/kWh, Missouri average $198

Approximate annual electric heating cost Lower where heating is gas rather than electric $229

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Cass County, where electricity is one line of eight.

Common questions

What is the weather like in Cass County?

Cass County averages a high of 88.3°F in July and a low of 22.1°F in January. Annual precipitation is 38.34 inches, with essentially no snow.

When is the rainy season in Cass County?

The wettest stretch is May, Jun, Jul, which accounts for 40% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Cass County?

The average daily high in July, the hottest month, is 88.3°F. That drives 1,446 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Cass County?

Effectively no. Measurable snowfall is rare in Cass County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station LEES SUMMIT MUNI AP, MO US (USW00053879), 21.7 miles from the county centroid.
Heating and cooling degree days — NOAA, same station and period.
Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Missouri residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.