30-year climate normals

Armstrong County Climate and Weather Averages

Hottest month — July

83.8°

average daily high. The coldest month is January, averaging a low of 17.2°F.

Armstrong County gets 44.32" of precipitation a year, and 30% of it falls in Jun, Jul, Aug.

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	35.7°	17.2°	3.20"
February	38.8°	18.1°	2.61"
March	48.4°	25.5°	3.25"
April	62.2°	35.1°	3.66"
May	72.0°	46.0°	3.99"
June	79.6°	55.4°	4.69"
July	83.8°	59.4°	4.45"
August	82.5°	58.0°	4.22"
September	75.8°	50.5°	4.22"
October	63.7°	39.3°	3.34"
November	50.9°	29.9°	3.31"
December	39.8°	22.9°	3.38"

Rainfall by month

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

January 3.20"

February 2.61"

March 3.25"

April 3.66"

May 3.99"

June 4.69"

July 4.45"

August 4.22"

September 4.22"

October 3.34"

November 3.31"

December 3.38"

Annual total 44.32"

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 617

Heating degree days How much heating the climate demands 6,194

Approximate annual cooling cost At 21.55¢/kWh, Pennsylvania average $133

Approximate annual electric heating cost Lower where heating is gas rather than electric $467

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 Armstrong County, where electricity is one line of eight.

Common questions

What is the weather like in Armstrong County?

Armstrong County averages a high of 83.8°F in July and a low of 17.2°F in January. Annual precipitation is 44.32 inches, with essentially no snow.

When is the rainy season in Armstrong County?

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

How hot does it get in Armstrong County?

The average daily high in July, the hottest month, is 83.8°F. That drives 617 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Armstrong County?

Effectively no. Measurable snowfall is rare in Armstrong County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station FORD CITY 4 S DAM, PA US (USC00362942), 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, Pennsylvania residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.