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Onawa city, Iowa

Official LSAD Designation: Onawa city • Census GEOID: 1959115 • Monona County

Climate Normals & Weather Observations

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

Reference Weather Station: ONAWA 3NW, IA US (ID: USC00136243) • Located 3.5 miles from community center • Elevation: 323.1 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 30.2° 8.5° 19.4° 0.54"
February 35.6° 12.5° 24.0° 0.78"
March 49.8° 23.9° 36.8° 1.57"
April 62.7° 34.7° 48.7° 3.28"
May 73.5° 47.9° 60.7° 4.58"
June 83.1° 59.0° 71.0° 4.18"
July 86.0° 62.6° 74.3° 3.39"
August 83.7° 59.4° 71.5° 4.07"
September 78.1° 50.3° 64.2° 2.97"
October 65.4° 37.3° 51.3° 2.31"
November 48.6° 23.7° 36.1° 1.50"
December 34.4° 13.5° 24.0° 0.69"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station ONAWA 3NW, IA US (ID: USC00136243) • 3.5 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 ONAWA 3NW, 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. 33.0 40.5 48.0 55.5 63.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 47.7°F 2010: Annual mean of daily highs 59.8°F 2010: Annual mean of daily lows 35.7°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 47.7 59.8 35.7
2011 Unavailable Unavailable 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 Unavailable
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.