Average annual temperature in Hardin County

Average annual temperature in Hardin County was 51.8 °F in 2025, according to NOAA National Centers for Environmental Information. That is down 5.8% from 2024. That is the 40th highest of 88 counties in 2025.

2025, °F51.8

Change on 2024-5.8%

Rank40th of 88Counties in Ohio ranked

Series high552024

Series low47.61978

Next release: Wednesday, 6 October 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Average annual temperature in Hardin County, 1950 to 2025

°F. Source: NOAA NCEI, NOAA Climate at a Glance, January to December average temperature, counties. Retrieved 2026-10-12, published 2026-10-06.

All 76 values

Period	°F
2025	51.8
2024	55
2023	53.6
2022	52.1
2021	53.3
2020	52.9
2019	52.2
2018	52
2017	52.6
2016	52.9
2015	50.8
2014	48.2
2013	50.2
2012	53.4
2011	51.6
2010	51
2009	49.7
2008	50
2007	51.6
2006	52.1
2005	50.9
2004	50.5
2003	49.5
2002	52
2001	51.8
2000	50
1999	51.7
1998	53.7
1997	49
1996	48.5
1995	49.5
1994	49.9
1993	49.4
1992	49.6
1991	52.5
1990	51.9
1989	48.7
1988	49.8
1987	51.8
1986	51
1985	49.8
1984	49.8
1983	50.5
1982	49.5
1981	49.2
1980	48.8
1979	48.4
1978	47.6
1977	49.6
1976	48.4
1975	50.5
1974	49.7
1973	51.6
1972	48.7
1971	50
1970	50
1969	48.8
1968	49.4
1967	48.7
1966	48.6
1965	49.7
1964	50.3
1963	48
1962	48.9
1961	49.5
1960	48.9
1959	50.6
1958	47.9
1957	50.1
1956	50
1955	51.1
1954	50.9
1953	51.7
1952	51.3
1951	49.3
1950	48.8

Compared with Ohio and United States

Place	2025
Hardin County	51.8
Ohio	51.9
United States	54.6

Rankings

US states by average annual temperature 50 places
Counties in Ohio by average annual temperature 88 places

Definition

Mean air temperature from January to December, in degrees Fahrenheit: the average of the 12 monthly mean temperatures. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.

Values are area averages, so a county with mountains and valleys has one value for very different local climates. NOAA revises the last two years every month.

How to cite

NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

NOAA National Centers for Environmental Information. (2026). NOAA Climate at a Glance, January to December average temperature, counties (Average annual temperature, Hardin County, 1950 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping

MLA 9

NOAA Climate at a Glance, January to December average temperature, counties, Average annual temperature, Hardin County, 1950 to 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Invokely, https://invokely.ai/en/average-annual-temperature/hardin-county-ohio. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December average temperature, counties. Average annual temperature, Hardin County, 1950 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Also distributed by Invokely, https://invokely.ai/en/average-annual-temperature/hardin-county-ohio.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December average temperature, counties, Average annual temperature, Hardin County, 1950 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping, via Invokely: https://invokely.ai/en/average-annual-temperature/hardin-county-ohio (Accessed: 12 October 2026).

BibTeX

@misc{noaa_average_annual_temperature_hardin_2025,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December average temperature, counties: Average annual temperature, Hardin County, 1950 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/average-annual-temperature/hardin-county-ohio. Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - NOAA National Centers for Environmental Information
TI  - NOAA Climate at a Glance, January to December average temperature, counties: Average annual temperature, Hardin County, 1950 to 2025
PY  - 2026
DA  - 2026/10/06
PB  - NOAA National Centers for Environmental Information
DB  - Invokely
UR  - https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
L2  - https://invokely.ai/en/average-annual-temperature/hardin-county-ohio
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/average-annual-temperature/hardin-county-ohio.
N1  - Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
ER  -

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Questions

What is the average annual temperature in Hardin County?

Where does this figure come from?

NOAA National Centers for Environmental Information. NOAA Climate at a Glance, January to December average temperature, counties. Retrieved by Invokely on 2026-10-12.

What was the highest average annual temperature in Hardin County?

55 °F in 2024, the highest value since 1950 in this series.

Related statistics for Hardin County

All statistics for Hardin County | Hardin County in figures