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Prosser city, Washington

Official LSAD Designation: Prosser city • Census GEOID: 5356450 • Benton County

Climate Normals & Weather Observations

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

Reference Weather Station: PROSSER, WA US (ID: USC00456768) • Located 0.7 miles from community center • Elevation: 253.0 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 40.1° 26.8° 33.5° 1.24"
February 46.7° 28.6° 37.6° 0.90"
March 55.9° 34.9° 45.4° 0.69"
April 64.6° 39.9° 52.2° 0.74"
May 74.1° 47.9° 61.0° 0.88"
June 80.9° 53.6° 67.2° 0.68"
July 90.4° 59.5° 75.0° 0.21"
August 89.2° 57.7° 73.4° 0.16"
September 79.7° 50.1° 64.9° 0.27"
October 64.7° 40.8° 52.8° 0.77"
November 49.3° 31.7° 40.5° 0.86"
December 39.5° 26.3° 32.9° 1.33"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station PROSSER, WA US (ID: USC00456768) • 0.7 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 PROSSER, WA 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. 37.0 45.3 53.5 61.8 70.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2016: Annual mean 54.4°F 2018: Annual mean 54.0°F 2019: Annual mean 50.8°F 2020: Annual mean 54.4°F 2011: Annual mean of daily highs 63.4°F 2016: Annual mean of daily highs 65.6°F 2018: Annual mean of daily highs 65.9°F 2019: Annual mean of daily highs 61.8°F 2020: Annual mean of daily highs 66.5°F 2021: Annual mean of daily highs 66.6°F 2022: Annual mean of daily highs 63.1°F 2023: Annual mean of daily highs 64.7°F 2024: Annual mean of daily highs 65.3°F 2025: Annual mean of daily highs 67.0°F 2016: Annual mean of daily lows 43.3°F 2018: Annual mean of daily lows 42.2°F 2019: Annual mean of daily lows 39.8°F 2020: Annual mean of daily lows 42.3°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 63.4 Unavailable
2012 Unavailable Unavailable Unavailable
2013 Unavailable Unavailable Unavailable
2014 Unavailable Unavailable Unavailable
2015 Unavailable Unavailable Unavailable
2016 54.4 65.6 43.3
2017 Unavailable Unavailable Unavailable
2018 54.0 65.9 42.2
2019 50.8 61.8 39.8
2020 54.4 66.5 42.3
2021 Unavailable 66.6 Unavailable
2022 Unavailable 63.1 Unavailable
2023 Unavailable 64.7 Unavailable
2024 Unavailable 65.3 Unavailable
2025 Unavailable 67.0 Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.