30-year climate normals

Seneca County Climate and Weather Averages

Hottest month — July

81.4°

average daily high. The coldest month is January, averaging a low of 17.5°F.

Seneca County gets 30.24" of precipitation a year, and 33% 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
January	32.7°	17.5°	1.49"
February	34.8°	18.5°	1.26"
March	43.2°	25.4°	2.06"
April	56.2°	35.5°	2.81"
May	68.8°	47.0°	2.88"
June	76.6°	57.0°	2.77"
July	81.4°	61.8°	3.39"
August	79.7°	59.9°	2.84"
September	73.0°	52.6°	3.89"
October	60.6°	42.6°	2.88"
November	48.4°	32.7°	2.14"
December	37.9°	24.7°	1.83"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 33% falling in the wettest three months (Jul, Aug, Sep).

January 1.49"

February 1.26"

March 2.06"

April 2.81"

May 2.88"

June 2.77"

July 3.39"

August 2.84"

September 3.89"

October 2.88"

November 2.14"

December 1.83"

Annual total 30.24"

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 596

Heating degree days How much heating the climate demands 6,505

Approximate annual cooling cost At 29.93¢/kWh, New York average $178

Approximate annual electric heating cost Lower where heating is gas rather than electric $681

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 Seneca County, where electricity is one line of eight.

Common questions

What is the weather like in Seneca County?

Seneca County averages a high of 81.4°F in July and a low of 17.5°F in January. Annual precipitation is 30.24 inches, with essentially no snow.

When is the rainy season in Seneca County?

The wettest stretch is Jul, Aug, Sep, which accounts for 33% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Seneca County?

The average daily high in July, the hottest month, is 81.4°F. That drives 596 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Seneca County?

Effectively no. Measurable snowfall is rare in Seneca County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station PENN YAN AP, NY US (USW00054778), 15.1 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, New York residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.