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Knoxville city, Iowa

Official LSAD Designation: Knoxville city • Census GEOID: 1942015 • Marion County

Climate Normals & Weather Observations

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

Reference Weather Station: KNOXVILLE, IA US (ID: USC00134502) • Located 0.4 miles from community center • Elevation: 272.8 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 29.9° 12.5° 21.2° 1.15"
February 35.1° 17.0° 26.0° 1.67"
March 47.6° 27.6° 37.6° 1.87"
April 60.6° 39.2° 49.9° 3.85"
May 70.9° 51.2° 61.1° 4.98"
June 80.6° 61.3° 70.9° 5.61"
July 84.6° 65.6° 75.1° 4.34"
August 82.7° 63.1° 72.9° 3.89"
September 76.2° 54.3° 65.3° 3.66"
October 63.0° 42.2° 52.6° 3.06"
November 48.1° 29.9° 39.0° 1.80"
December 35.5° 18.9° 27.2° 1.57"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station KNOXVILLE, IA US (ID: USC00134502) • 0.4 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 KNOXVILLE, IA 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. 35.0 42.5 50.0 57.5 65.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2013: Annual mean 48.7°F 2015: Annual mean 51.0°F 2016: Annual mean 52.3°F 2017: Annual mean 52.0°F 2018: Annual mean 49.2°F 2019: Annual mean 48.9°F 2022: Annual mean 48.7°F 2013: Annual mean of daily highs 58.6°F 2015: Annual mean of daily highs 60.6°F 2016: Annual mean of daily highs 61.8°F 2017: Annual mean of daily highs 62.0°F 2018: Annual mean of daily highs 58.7°F 2019: Annual mean of daily highs 58.4°F 2022: Annual mean of daily highs 59.7°F 2013: Annual mean of daily lows 38.9°F 2015: Annual mean of daily lows 41.5°F 2016: Annual mean of daily lows 42.8°F 2017: Annual mean of daily lows 41.9°F 2018: Annual mean of daily lows 39.7°F 2019: Annual mean of daily lows 39.3°F 2022: Annual mean of daily lows 37.6°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 Unavailable
2011 Unavailable Unavailable Unavailable
2012 Unavailable Unavailable Unavailable
2013 48.7 58.6 38.9
2014 Unavailable Unavailable Unavailable
2015 51.0 60.6 41.5
2016 52.3 61.8 42.8
2017 52.0 62.0 41.9
2018 49.2 58.7 39.7
2019 48.9 58.4 39.3
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 48.7 59.7 37.6
2023 Unavailable Unavailable Unavailable
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.