30-year climate normals

Grand County Climate and Weather Averages

Hottest month — July

79.2°

average daily high. The coldest month is January, averaging a low of 0.1°F.

Grand County gets 14.25" of precipitation a year and 81.2" of snow, and 30% of it falls in Jul, Aug, Sep.

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	Snow
January	25.9°	0.1°	1.00"	14.2"
February	31.1°	3.7°	0.95"	13.6"
March	42.3°	14.6°	0.98"	10.4"
April	52.1°	23.7°	1.46"	11.9"
May	62.1°	31.7°	1.53"	2.7"
June	73.1°	38.4°	0.99"	0.1"
July	79.2°	44.5°	1.44"	0.0"
August	77.1°	43.0°	1.44"	0.0"
September	70.1°	34.9°	1.40"	0.3"
October	56.9°	25.1°	1.26"	4.8"
November	41.0°	14.7°	0.92"	9.9"
December	28.2°	3.5°	0.88"	13.3"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 30% falling in the wettest three months (Jul, Aug, Sep).

January 1.00"

February 0.95"

March 0.98"

April 1.46"

May 1.53"

June 0.99"

July 1.44"

August 1.44"

September 1.40"

October 1.26"

November 0.92"

December 0.88"

Annual total 14.25"

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 18

Heating degree days How much heating the climate demands 9,756

Approximate annual cooling cost At 16.16¢/kWh, Colorado average $3

Approximate annual electric heating cost Lower where heating is gas rather than electric $552

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 Grand County, where electricity is one line of eight.

Common questions

What is the weather like in Grand County?

Grand County averages a high of 79.2°F in July and a low of 0.1°F in January. Annual precipitation is 14.25 inches, including 81.2 inches of snow.

When is the rainy season in Grand County?

The wettest stretch is Jul, Aug, Sep, which accounts for 30% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Grand County?

The average daily high in July, the hottest month, is 79.2°F. That drives 18 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Grand County?

Yes. Grand County averages 81.2 inches of snow a year.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station WILLIAMS FORK DAM, CO US (USC00059096), 7.2 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, Colorado residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.