Average annual temperature in Hardin County

Average annual temperature in Hardin County was 57.8 °F in 2025, according to NOAA National Centers for Environmental Information. That is down 2.4% from 2024. That is the 4th highest of 102 counties in 2025.

2025, °F57.8

Change on 2024-2.4%

Rank4th of 102Counties in Illinois ranked

Series high602012

Series low53.71979

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	57.8
2024	59.2
2023	58.6
2022	56.9
2021	57.4
2020	57.3
2019	57.2
2018	56.9
2017	58.7
2016	58.6
2015	57.1
2014	54.5
2013	55.3
2012	60
2011	57.7
2010	57.1
2009	56.5
2008	56.1
2007	58.6
2006	57.7
2005	58
2004	57.1
2003	56.1
2002	57.8
2001	57.3
2000	56.5
1999	58.3
1998	59.1
1997	55.1
1996	54.9
1995	56.2
1994	56.2
1993	55.2
1992	56.1
1991	58.1
1990	57.7
1989	54.6
1988	55.6
1987	57.5
1986	57.1
1985	55.1
1984	55.9
1983	55.5
1982	55.8
1981	55.7
1980	55.5
1979	53.7
1978	53.9
1977	56.1
1976	54.4
1975	56.3
1974	56.2
1973	57
1972	55.4
1971	56.1
1970	55.7
1969	54.8
1968	54.9
1967	55.3
1966	54.7
1965	56.6
1964	56.6
1963	54.9
1962	55.3
1961	55
1960	54.3
1959	56.2
1958	53.9
1957	56.3
1956	57.2
1955	56.7
1954	58.2
1953	58
1952	57.3
1951	55.4
1950	55.1

Compared with Illinois and United States

Place	2025
Hardin County	57.8
Illinois	53.6
United States	54.6

Hardin County compared with nearby places

Under 51
51 to 53
53 to 54
54 to 55
55 to 57
57 and over

Average annual temperature, 2025, °F. Hardin County is outlined. Same source and period for every area shown. Source: NOAA National Centers for Environmental Information. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

US states by average annual temperature 50 places
Counties in Illinois by average annual temperature 102 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.

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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-illinois. 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-illinois.

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-illinois (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-illinois. 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-illinois
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/average-annual-temperature/hardin-county-illinois.
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?

60 °F in 2012, the highest value since 1950 in this series.

Related statistics for Hardin County

All statistics for Hardin County | Hardin County in figures