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United States › Idaho › Bonneville County › Climate Station IDAHO FALLS 16 SE, ID US Distance 8.9 mi Normals 1991–2020

30-year climate normals

Bonneville County Climate and Weather Averages

Hottest month — July

80.9°

average daily high. The coldest month is December, averaging a low of 13.2°F.

Bonneville County gets 17.32" of precipitation a year and 65.7" of snow, and 30% of it falls in Mar, Apr, May.

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 PrecipSnow
January 30.7° 13.9° 1.78" 17.0"
February 33.9° 15.2° 1.16" 11.8"
March 42.3° 23.6° 1.39" 7.6"
April 51.2° 29.2° 1.64" 2.9"
May 61.8° 36.7° 2.17" 0.9"
June 70.7° 42.9° 1.37" 0.2"
July 80.9° 49.5° 0.85" 0.0"
August 79.4° 47.7° 0.89" 0.0"
September 69.6° 40.1° 1.38" 0.0"
October 55.5° 30.3° 1.41" 1.7"
November 41.1° 21.1° 1.40" 7.6"
December 30.3° 13.2° 1.88" 16.0"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 30% falling in the wettest three months (Mar, Apr, May).

January 1.78"
February 1.16"
March 1.39"
April 1.64"
May 2.17"
June 1.37"
July 0.85"
August 0.89"
September 1.38"
October 1.41"
November 1.40"
December 1.88"
Annual total 17.32"

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 136
Heating degree days How much heating the climate demands 8,450
Approximate annual cooling cost At 12.35¢/kWh, Idaho average $17
Approximate annual electric heating cost Lower where heating is gas rather than electric $365

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 Bonneville County, where electricity is one line of eight.

Common questions

What is the weather like in Bonneville County?

Bonneville County averages a high of 80.9°F in July and a low of 13.2°F in December. Annual precipitation is 17.32 inches, including 65.7 inches of snow.

When is the rainy season in Bonneville County?

The wettest stretch is Mar, Apr, May, which accounts for 30% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Bonneville County?

The average daily high in July, the hottest month, is 80.9°F. That drives 136 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Bonneville County?

Yes. Bonneville County averages 65.7 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station IDAHO FALLS 16 SE, ID US (USC00104456), 8.9 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.