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Irrigon city, Oregon

Official LSAD Designation: Irrigon city • Census GEOID: 4136500 • Morrow County

Climate Normals & Weather Observations

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

Reference Weather Station: HERMISTON 2 NW, OR US (ID: USC00353818) • Located 8.9 miles from community center • Elevation: 140.2 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 41.7° 26.0° 33.8° 1.28"
February 47.9° 26.3° 37.1° 0.84"
March 57.9° 31.3° 44.6° 0.80"
April 65.6° 37.2° 51.4° 0.78"
May 74.2° 44.9° 59.5° 0.87"
June 80.6° 51.4° 66.0° 0.65"
July 89.4° 56.1° 72.7° 0.24"
August 88.7° 53.8° 71.3° 0.17"
September 79.8° 45.6° 62.7° 0.26"
October 65.6° 36.2° 50.9° 0.84"
November 50.5° 29.1° 39.8° 1.05"
December 41.5° 25.7° 33.6° 1.04"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station HERMISTON 2 NW, OR US (ID: USC00353818) • 8.9 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 HERMISTON 2 NW, OR 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. 34.0 44.3 54.5 64.8 75.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 52.5°F 2011: Annual mean 51.4°F 2012: Annual mean 52.8°F 2013: Annual mean 52.2°F 2016: Annual mean 53.4°F 2017: Annual mean 50.8°F 2018: Annual mean 51.4°F 2019: Annual mean 50.7°F 2020: Annual mean 53.5°F 2021: Annual mean 54.6°F 2023: Annual mean 55.0°F 2024: Annual mean 55.1°F 2025: Annual mean 56.4°F 2010: Annual mean of daily highs 64.6°F 2011: Annual mean of daily highs 64.2°F 2012: Annual mean of daily highs 66.0°F 2013: Annual mean of daily highs 65.7°F 2016: Annual mean of daily highs 66.5°F 2017: Annual mean of daily highs 63.6°F 2018: Annual mean of daily highs 65.1°F 2019: Annual mean of daily highs 63.4°F 2020: Annual mean of daily highs 67.7°F 2021: Annual mean of daily highs 68.7°F 2023: Annual mean of daily highs 69.2°F 2024: Annual mean of daily highs 69.2°F 2025: Annual mean of daily highs 71.1°F 2010: Annual mean of daily lows 40.3°F 2011: Annual mean of daily lows 38.5°F 2012: Annual mean of daily lows 39.7°F 2013: Annual mean of daily lows 38.8°F 2016: Annual mean of daily lows 40.3°F 2017: Annual mean of daily lows 38.1°F 2018: Annual mean of daily lows 37.5°F 2019: Annual mean of daily lows 38.0°F 2020: Annual mean of daily lows 39.4°F 2021: Annual mean of daily lows 40.4°F 2023: Annual mean of daily lows 40.8°F 2024: Annual mean of daily lows 41.0°F 2025: Annual mean of daily lows 41.6°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 52.5 64.6 40.3
2011 51.4 64.2 38.5
2012 52.8 66.0 39.7
2013 52.2 65.7 38.8
2014 Unavailable Unavailable Unavailable
2015 Unavailable Unavailable Unavailable
2016 53.4 66.5 40.3
2017 50.8 63.6 38.1
2018 51.4 65.1 37.5
2019 50.7 63.4 38.0
2020 53.5 67.7 39.4
2021 54.6 68.7 40.4
2022 Unavailable Unavailable Unavailable
2023 55.0 69.2 40.8
2024 55.1 69.2 41.0
2025 56.4 71.1 41.6
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.