30-year climate normals

Franklin County Climate and Weather Averages

Hottest month — July

82.7°

average daily high. The coldest month is February, averaging a low of 13.6°F.

Franklin County gets 49.39" of precipitation a year, and 28% of it falls in Aug, Sep, Oct.

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	33.3°	14.6°	3.52"
February	37.4°	13.6°	3.09"
March	45.3°	23.3°	3.93"
April	58.5°	34.3°	3.80"
May	69.6°	45.2°	3.98"
June	78.1°	53.9°	4.84"
July	82.7°	59.3°	4.06"
August	81.1°	57.3°	4.67"
September	74.1°	50.3°	4.24"
October	62.0°	38.9°	4.73"
November	49.6°	29.1°	3.80"
December	39.5°	20.7°	4.73"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 28% falling in the wettest three months (Aug, Sep, Oct).

January 3.52"

February 3.09"

March 3.93"

April 3.80"

May 3.98"

June 4.84"

July 4.06"

August 4.67"

September 4.24"

October 4.73"

November 3.80"

December 4.73"

Annual total 49.39"

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 519

Heating degree days How much heating the climate demands 6,683

Approximate annual cooling cost At 28.82¢/kWh, Massachusetts average $150

Approximate annual electric heating cost Lower where heating is gas rather than electric $674

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 Franklin County, where electricity is one line of eight.

Common questions

What is the weather like in Franklin County?

Franklin County averages a high of 82.7°F in July and a low of 13.6°F in February. Annual precipitation is 49.39 inches, with essentially no snow.

When is the rainy season in Franklin County?

The wettest stretch is Aug, Sep, Oct, which accounts for 28% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Franklin County?

The average daily high in July, the hottest month, is 82.7°F. That drives 519 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Franklin County?

Effectively no. Measurable snowfall is rare in Franklin County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station GREENFIELD #3, MA US (USC00193229), 0.9 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, Massachusetts residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.