30-year climate normals

Benton County Climate and Weather Averages

Hottest month — July

89.7°

average daily high. The coldest month is January, averaging a low of 21.9°F.

Benton County gets 43.54" of precipitation a year, and 36% 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	42.5°	21.9°	1.75"
February	46.8°	25.1°	2.14"
March	57.0°	33.9°	3.04"
April	67.7°	43.7°	4.60"
May	76.1°	55.1°	5.52"
June	84.9°	64.9°	5.24"
July	89.7°	69.4°	4.70"
August	88.8°	67.3°	3.96"
September	81.6°	58.5°	4.11"
October	69.9°	46.3°	3.45"
November	57.3°	35.6°	3.06"
December	46.4°	26.7°	1.97"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 36% falling in the wettest three months (May, Jun, Jul).

January 1.75"

February 2.14"

March 3.04"

April 4.60"

May 5.52"

June 5.24"

July 4.70"

August 3.96"

September 4.11"

October 3.45"

November 3.06"

December 1.97"

Annual total 43.54"

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 1,523

Heating degree days How much heating the climate demands 4,568

Approximate annual cooling cost At 13.68¢/kWh, Missouri average $208

Approximate annual electric heating cost Lower where heating is gas rather than electric $219

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 Benton County, where electricity is one line of eight.

Common questions

What is the weather like in Benton County?

Benton County averages a high of 89.7°F in July and a low of 21.9°F in January. Annual precipitation is 43.54 inches, with essentially no snow.

When is the rainy season in Benton County?

The wettest stretch is May, Jun, Jul, which accounts for 36% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Benton County?

The average daily high in July, the hottest month, is 89.7°F. That drives 1,523 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Benton County?

Effectively no. Measurable snowfall is rare in Benton County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station TRUMAN DAM & RSVR, MO US (USC00238466), 7.4 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.