30-year climate normals

Monroe County Climate and Weather Averages

Hottest month — July

83.3°

average daily high. The coldest month is January, averaging a low of 20.4°F.

Monroe County gets 45.02" 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	38.3°	20.4°	3.67"
February	41.8°	22.2°	3.13"
March	51.0°	28.7°	3.89"
April	63.9°	37.8°	3.90"
May	72.6°	48.3°	4.50"
June	80.0°	57.3°	4.51"
July	83.3°	62.0°	4.67"
August	82.8°	61.0°	3.58"
September	77.0°	54.4°	3.70"
October	65.5°	42.7°	3.04"
November	53.0°	32.0°	2.85"
December	42.5°	25.7°	3.58"

Rainfall by month

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

January 3.67"

February 3.13"

March 3.89"

April 3.90"

May 4.50"

June 4.51"

July 4.67"

August 3.58"

September 3.70"

October 3.04"

November 2.85"

December 3.58"

Annual total 45.02"

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 743

Heating degree days How much heating the climate demands 5,507

Approximate annual cooling cost At 19.52¢/kWh, Ohio average $145

Approximate annual electric heating cost Lower where heating is gas rather than electric $376

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 Monroe County, where electricity is one line of eight.

Common questions

What is the weather like in Monroe County?

Monroe County averages a high of 83.3°F in July and a low of 20.4°F in January. Annual precipitation is 45.02 inches, with essentially no snow.

When is the rainy season in Monroe 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 Monroe County?

The average daily high in July, the hottest month, is 83.3°F. That drives 743 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Monroe County?

Effectively no. Measurable snowfall is rare in Monroe County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station HANNIBAL LOCKS & DAM, OH US (USC00333500), 12.6 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.