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Mount Vernon city, Oregon

Official LSAD Designation: Mount Vernon city • Census GEOID: 4150250 • Grant County

Climate Normals & Weather Observations

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

Reference Weather Station: JOHN DAY, OR US (ID: USC00354291) • Located 7.6 miles from community center • Elevation: 933.6 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 40.3° 21.2° 30.8° 1.09"
February 44.8° 22.6° 33.7° 0.60"
March 51.5° 26.4° 38.9° 1.14"
April 57.3° 30.3° 43.8° 1.49"
May 66.4° 37.1° 51.8° 1.83"
June 74.5° 42.7° 58.6° 1.30"
July 86.2° 47.8° 67.0° 0.43"
August 85.8° 46.1° 65.9° 0.50"
September 76.7° 39.1° 57.9° 0.52"
October 62.2° 31.1° 46.7° 1.04"
November 47.5° 25.6° 36.6° 1.19"
December 39.0° 20.8° 29.9° 1.14"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station JOHN DAY, OR US (ID: USC00354291) • 7.6 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 JOHN DAY, 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. 29.0 38.5 48.0 57.5 67.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 48.3°F 2011: Annual mean 47.2°F 2013: Annual mean 46.5°F 2016: Annual mean 48.1°F 2018: Annual mean 47.1°F 2019: Annual mean 46.0°F 2020: Annual mean 47.7°F 2022: Annual mean 46.9°F 2023: Annual mean 47.2°F 2010: Annual mean of daily highs 62.1°F 2011: Annual mean of daily highs 61.3°F 2012: Annual mean of daily highs 63.3°F 2013: Annual mean of daily highs 60.6°F 2016: Annual mean of daily highs 62.3°F 2018: Annual mean of daily highs 61.3°F 2019: Annual mean of daily highs 59.6°F 2020: Annual mean of daily highs 62.1°F 2022: Annual mean of daily highs 61.1°F 2023: Annual mean of daily highs 60.7°F 2010: Annual mean of daily lows 34.5°F 2011: Annual mean of daily lows 33.2°F 2013: Annual mean of daily lows 32.5°F 2016: Annual mean of daily lows 33.8°F 2018: Annual mean of daily lows 32.9°F 2019: Annual mean of daily lows 32.5°F 2020: Annual mean of daily lows 33.4°F 2022: Annual mean of daily lows 32.8°F 2023: Annual mean of daily lows 33.7°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 48.3 62.1 34.5
2011 47.2 61.3 33.2
2012 Unavailable 63.3 Unavailable
2013 46.5 60.6 32.5
2014 Unavailable Unavailable Unavailable
2015 Unavailable Unavailable Unavailable
2016 48.1 62.3 33.8
2017 Unavailable Unavailable Unavailable
2018 47.1 61.3 32.9
2019 46.0 59.6 32.5
2020 47.7 62.1 33.4
2021 Unavailable Unavailable Unavailable
2022 46.9 61.1 32.8
2023 47.2 60.7 33.7
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.