Average annual temperature in Alexander County

Average annual temperature in Alexander County was 58.7 °F in 2025, according to NOAA National Centers for Environmental Information. That is down 2.7% from 2024. That is the 1st highest of 102 counties in 2025.

2025, °F58.7

Change on 2024-2.7%

Rank1st of 102Counties in Illinois ranked

Series high60.72012

Series low54.31979

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 Alexander 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	58.7
2024	60.3
2023	59.6
2022	57.7
2021	58.7
2020	58.4
2019	58.2
2018	58
2017	59.2
2016	59.4
2015	57.8
2014	55.4
2013	56.2
2012	60.7
2011	58.2
2010	58
2009	57
2008	56.2
2007	59
2006	58.2
2005	58.7
2004	57.6
2003	56.6
2002	58
2001	58.1
2000	57.3
1999	58.7
1998	59.9
1997	56.1
1996	55.9
1995	56.9
1994	57.1
1993	56.2
1992	56.9
1991	58.3
1990	58.3
1989	55.4
1988	56.2
1987	58.3
1986	58
1985	56.1
1984	56.5
1983	56.2
1982	56.4
1981	56.4
1980	56.4
1979	54.3
1978	54.6
1977	56.7
1976	55
1975	56.6
1974	56.6
1973	57.5
1972	55.8
1971	56.9
1970	56.1
1969	55.7
1968	55.4
1967	55.9
1966	55.1
1965	57.2
1964	57.3
1963	55.8
1962	56.2
1961	55.7
1960	55.3
1959	56.9
1958	54.9
1957	57
1956	57.7
1955	57.3
1954	58.6
1953	58.5
1952	57.8
1951	55.9
1950	55.6

Compared with Illinois and United States

Place	2025
Alexander County	58.7
Illinois	53.6
United States	54.6

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.

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, Alexander 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, Alexander 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/alexander-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, Alexander 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/alexander-county-illinois.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December average temperature, counties, Average annual temperature, Alexander 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/alexander-county-illinois (Accessed: 12 October 2026).

BibTeX

@misc{noaa_average_annual_temperature_alexander_2025,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December average temperature, counties: Average annual temperature, Alexander 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/alexander-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, Alexander 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/alexander-county-illinois
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/average-annual-temperature/alexander-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  -

Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Embed code

<iframe src="https://invokely.ai/embed/average-annual-temperature/alexander-county-illinois" width="760" height="440" title="Average annual temperature, Alexander County, chart from Invokely" loading="lazy" style="border:0;width:100%;max-width:760px" referrerpolicy="strict-origin-when-cross-origin"></iframe>

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

What is the latest average annual temperature in Alexander County? Cite the source.

get_value {"indicator":"average_temperature_annual","place":"us-county-17003"}
GET https://invokely.ai/api/v1/value?indicator=average_temperature_annual&place=us-county-17003

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

What is the average annual temperature in Alexander 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 Alexander County?

60.7 °F in 2012, the highest value since 1950 in this series.

Related statistics for Alexander County

All statistics for Alexander County | Alexander County in figures