30-year climate normals

Gallia County Climate and Weather Averages

Hottest month — July

86.2°

average daily high. The coldest month is January, averaging a low of 23.1°F.

Gallia County gets 44.53" of precipitation a year, and 30% of it falls in May, Jun, Jul.

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	41.0°	23.1°	3.07"
February	45.5°	25.2°	3.08"
March	54.7°	32.2°	4.05"
April	67.1°	41.7°	3.92"
May	75.1°	52.4°	4.48"
June	82.9°	61.4°	4.61"
July	86.2°	65.7°	4.47"
August	85.6°	64.1°	3.55"
September	79.8°	57.0°	3.75"
October	68.4°	44.8°	3.12"
November	56.1°	34.2°	2.63"
December	45.4°	28.2°	3.80"

Rainfall by month

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

January 3.07"

February 3.08"

March 4.05"

April 3.92"

May 4.48"

June 4.61"

July 4.47"

August 3.55"

September 3.75"

October 3.12"

November 2.63"

December 3.80"

Annual total 44.53"

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 1,148

Heating degree days How much heating the climate demands 4,793

Approximate annual cooling cost At 19.52¢/kWh, Ohio average $224

Approximate annual electric heating cost Lower where heating is gas rather than electric $327

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 Gallia County, where electricity is one line of eight.

Common questions

What is the weather like in Gallia County?

Gallia County averages a high of 86.2°F in July and a low of 23.1°F in January. Annual precipitation is 44.53 inches, with essentially no snow.

When is the rainy season in Gallia County?

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

How hot does it get in Gallia County?

The average daily high in July, the hottest month, is 86.2°F. That drives 1,148 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Gallia County?

Effectively no. Measurable snowfall is rare in Gallia County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station GALLIPOLIS, OH US (USC00333029), 6.5 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, Ohio residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.