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United States › Idaho › Boundary County › Climate Station BONNERS FERRY, ID US Distance 11.2 mi Normals 1991–2020

30-year climate normals

Boundary County Climate and Weather Averages

Hottest month — July

84.8°

average daily high. The coldest month is January, averaging a low of 23.7°F.

Boundary County gets 21.07" of precipitation a year and 53.8" of snow, and 40% 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 PrecipSnow
January 33.7° 23.7° 2.63" 15.0"
February 38.6° 24.6° 1.83" 10.8"
March 48.4° 29.7° 2.01" 3.7"
April 59.2° 35.5° 1.26" 0.4"
May 69.4° 43.1° 1.78" 0.0"
June 74.6° 49.2° 1.92" 0.0"
July 84.8° 53.2° 0.64" 0.0"
August 84.7° 52.0° 0.53" 0.0"
September 73.3° 44.5° 1.02" 0.0"
October 56.3° 35.6° 1.73" 0.2"
November 41.5° 29.7° 2.55" 6.4"
December 33.1° 23.8° 3.17" 17.3"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 40% falling in the wettest three months (Nov, Dec, Jan).

January 2.63"
February 1.83"
March 2.01"
April 1.26"
May 1.78"
June 1.92"
July 0.64"
August 0.53"
September 1.02"
October 1.73"
November 2.55"
December 3.17"
Annual total 21.07"

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 355
Heating degree days How much heating the climate demands 6,674
Approximate annual cooling cost At 12.35¢/kWh, Idaho average $44
Approximate annual electric heating cost Lower where heating is gas rather than electric $288

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 Boundary County, where electricity is one line of eight.

Common questions

What is the weather like in Boundary County?

Boundary County averages a high of 84.8°F in July and a low of 23.7°F in January. Annual precipitation is 21.07 inches, including 53.8 inches of snow.

When is the rainy season in Boundary County?

The wettest stretch is Nov, Dec, Jan, which accounts for 40% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Boundary County?

The average daily high in July, the hottest month, is 84.8°F. That drives 355 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Boundary County?

Yes. Boundary County averages 53.8 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station BONNERS FERRY, ID US (USC00101079), 11.2 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.