30-year climate normals

Oswego County Climate and Weather Averages

Hottest month — July

80.3°

average daily high. The coldest month is January, averaging a low of 15.8°F.

Oswego County gets 39.56" of precipitation a year, and 30% of it falls in Sep, Oct, Nov.

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	30.5°	15.8°	2.69"
February	32.6°	17.1°	2.16"
March	40.7°	24.5°	2.62"
April	54.6°	34.9°	3.27"
May	67.6°	45.8°	3.49"
June	75.8°	54.5°	3.24"
July	80.3°	59.7°	3.70"
August	78.7°	58.6°	3.28"
September	71.7°	51.2°	3.62"
October	59.3°	41.7°	4.48"
November	47.1°	32.2°	3.83"
December	36.1°	23.2°	3.18"

Rainfall by month

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

January 2.69"

February 2.16"

March 2.62"

April 3.27"

May 3.49"

June 3.24"

July 3.70"

August 3.28"

September 3.62"

October 4.48"

November 3.83"

December 3.18"

Annual total 39.56"

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 468

Heating degree days How much heating the climate demands 6,898

Approximate annual cooling cost At 29.93¢/kWh, New York average $140

Approximate annual electric heating cost Lower where heating is gas rather than electric $723

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 Oswego County, where electricity is one line of eight.

Common questions

What is the weather like in Oswego County?

Oswego County averages a high of 80.3°F in July and a low of 15.8°F in January. Annual precipitation is 39.56 inches, with essentially no snow.

When is the rainy season in Oswego County?

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

How hot does it get in Oswego County?

The average daily high in July, the hottest month, is 80.3°F. That drives 468 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Oswego County?

Effectively no. Measurable snowfall is rare in Oswego County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station FULTON OSWEGO CO AP, NY US (USW00054773), 11.7 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.