30-year climate normals

Teton County Climate and Weather Averages

Hottest month — July

82.9°

average daily high. The coldest month is January, averaging a low of 9.3°F.

Teton County gets 19.35" of precipitation a year, and 32% of it falls in Apr, May, Jun.

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	32.8°	9.3°	1.95"
February	36.0°	12.3°	1.07"
March	44.3°	20.3°	1.37"
April	53.9°	27.5°	1.90"
May	64.6°	35.2°	2.30"
June	73.2°	41.2°	1.97"
July	82.9°	47.5°	1.06"
August	81.8°	45.6°	1.23"
September	72.7°	38.2°	1.47"
October	58.1°	28.7°	1.77"
November	43.7°	19.0°	1.52"
December	32.8°	10.5°	1.74"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 32% falling in the wettest three months (Apr, May, Jun).

January 1.95"

February 1.07"

March 1.37"

April 1.90"

May 2.30"

June 1.97"

July 1.06"

August 1.23"

September 1.47"

October 1.77"

November 1.52"

December 1.74"

Annual total 19.35"

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 120

Heating degree days How much heating the climate demands 8,414

Approximate annual cooling cost At 12.35¢/kWh, Idaho average $15

Approximate annual electric heating cost Lower where heating is gas rather than electric $364

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 Teton County, where electricity is one line of eight.

Common questions

What is the weather like in Teton County?

Teton County averages a high of 82.9°F in July and a low of 9.3°F in January. Annual precipitation is 19.35 inches, with essentially no snow.

When is the rainy season in Teton County?

The wettest stretch is Apr, May, Jun, which accounts for 32% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Teton County?

The average daily high in July, the hottest month, is 82.9°F. That drives 120 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Teton County?

Effectively no. Measurable snowfall is rare in Teton County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station DRIGGS, ID US (USC00102676), 5.4 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, Idaho residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.