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United States › Kansas › Riley County › Climate Station MANHATTAN MUNI AP, KS US Distance 11.1 mi Normals 1991–2020

30-year climate normals

Riley County Climate and Weather Averages

Hottest month — July

91.5°

average daily high. The coldest month is January, averaging a low of 17.8°F.

Riley County gets 32.17" of precipitation a year, and 42% 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.

20° 40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 41.0° 17.8° 0.65"
February 46.1° 21.8° 0.96"
March 57.6° 31.8° 1.83"
April 67.4° 41.8° 3.13"
May 76.8° 52.9° 4.65"
June 86.6° 63.4° 4.83"
July 91.5° 68.0° 4.01"
August 89.6° 65.3° 4.64"
September 81.6° 56.0° 2.69"
October 69.3° 42.9° 2.18"
November 55.4° 30.4° 1.54"
December 43.9° 20.7° 1.06"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 42% falling in the wettest three months (May, Jun, Jul).

January 0.65"
February 0.96"
March 1.83"
April 3.13"
May 4.65"
June 4.83"
July 4.01"
August 4.64"
September 2.69"
October 2.18"
November 1.54"
December 1.06"
Annual total 32.17"

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 1,490
Heating degree days How much heating the climate demands 5,104
Approximate annual cooling cost At 15.13¢/kWh, Kansas average $225
Approximate annual electric heating cost Lower where heating is gas rather than electric $270

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 Riley County, where electricity is one line of eight.

Common questions

What is the weather like in Riley County?

Riley County averages a high of 91.5°F in July and a low of 17.8°F in January. Annual precipitation is 32.17 inches, with essentially no snow.

When is the rainy season in Riley County?

The wettest stretch is May, Jun, Jul, which accounts for 42% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Riley County?

The average daily high in July, the hottest month, is 91.5°F. That drives 1,490 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Riley County?

Effectively no. Measurable snowfall is rare in Riley County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station MANHATTAN MUNI AP, KS US (USW00003936), 11.1 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, Kansas residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.