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United States › Idaho › Canyon County › Climate Station DEER FLAT DAM, ID US Distance 3.9 mi Normals 1991–2020

30-year climate normals

Canyon County Climate and Weather Averages

Hottest month — July

89.9°

average daily high. The coldest month is December, averaging a low of 24.0°F.

Canyon County gets 10" of precipitation a year, and 34% of it falls in Nov, Dec, Jan.

Temperature through the year

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

40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 39.8° 24.5° 1.22"
February 47.4° 27.3° 0.99"
March 58.4° 33.8° 1.10"
April 64.5° 38.4° 1.06"
May 73.1° 46.0° 1.15"
June 80.9° 52.1° 0.70"
July 89.9° 59.2° 0.29"
August 89.1° 57.0° 0.19"
September 80.0° 49.0° 0.37"
October 66.4° 39.2° 0.75"
November 50.3° 30.5° 1.07"
December 40.1° 24.0° 1.11"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 34% falling in the wettest three months (Nov, Dec, Jan).

January 1.22"
February 0.99"
March 1.10"
April 1.06"
May 1.15"
June 0.70"
July 0.29"
August 0.19"
September 0.37"
October 0.75"
November 1.07"
December 1.11"
Annual total 10"

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 771
Heating degree days How much heating the climate demands 5,288
Approximate annual cooling cost At 12.35¢/kWh, Idaho average $95
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 Canyon County, where electricity is one line of eight.

Common questions

What is the weather like in Canyon County?

Canyon County averages a high of 89.9°F in July and a low of 24.0°F in December. Annual precipitation is 10 inches, with essentially no snow.

When is the rainy season in Canyon County?

The wettest stretch is Nov, Dec, Jan, which accounts for 34% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Canyon County?

The average daily high in July, the hottest month, is 89.9°F. That drives 771 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Canyon County?

Effectively no. Measurable snowfall is rare in Canyon County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station DEER FLAT DAM, ID US (USC00102444), 3.9 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, Idaho residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.