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Anna city, Illinois

Official LSAD Designation: Anna city • Census GEOID: 1701543 • Union County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Anna city.

Reference Weather Station: ANNA 2 NNE, IL US (ID: USC00110187) • Located 1.4 miles from community center • Elevation: 195.1 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 45.2° 25.4° 35.3° 3.53"
February 50.0° 29.1° 39.6° 3.40"
March 60.8° 37.0° 48.9° 4.82"
April 71.4° 46.4° 58.9° 5.63"
May 79.0° 56.1° 67.6° 5.93"
June 87.0° 64.7° 75.9° 4.95"
July 89.7° 68.7° 79.2° 3.70"
August 89.4° 67.0° 78.2° 3.15"
September 83.5° 59.2° 71.3° 3.49"
October 72.7° 47.5° 60.1° 3.89"
November 59.0° 37.0° 48.0° 4.54"
December 48.0° 29.7° 38.9° 4.10"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station ANNA 2 NNE, IL US (ID: USC00110187) • 1.4 miles from community center .

This is the same reference station used for monthly normals.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at ANNA 2 NNE, IL US Year is the horizontal axis. Annual mean temperature in degrees Fahrenheit is the vertical axis. Dots show recorded years; lines connect consecutive available years only. Missing years are gaps, with no interpolation. Optional dashed lines show annual mean of daily highs and lows. Exact values appear in the data table below. 43.0 50.5 58.0 65.5 73.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2025: Annual mean 56.5°F 2011: Annual mean of daily highs 70.5°F 2025: Annual mean of daily highs 66.7°F 2010: Annual mean of daily lows 47.0°F 2023: Annual mean of daily lows 47.2°F 2025: Annual mean of daily lows 46.4°F

Source: NOAA NCEI Global Summary of the Year.

Annual temperature data table (°F)
Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year Annual mean (°F) Annual mean of daily highs (°F) Annual mean of daily lows (°F)
2010 Unavailable Unavailable 47.0
2011 Unavailable 70.5 Unavailable
2012 Unavailable Unavailable Unavailable
2013 Unavailable Unavailable Unavailable
2014 Unavailable Unavailable Unavailable
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 Unavailable Unavailable Unavailable
2018 Unavailable Unavailable Unavailable
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 Unavailable Unavailable Unavailable
2023 Unavailable Unavailable 47.2
2024 Unavailable Unavailable Unavailable
2025 56.5 66.7 46.4
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.