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Birch Bay CDP, Washington

Official LSAD Designation: Birch Bay CDP • Census GEOID: 5306190 • Whatcom County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Birch Bay CDP.

Reference Weather Station: BLAINE, WA US (ID: USC00450729) • Located 4.3 miles from community center • Elevation: 18.3 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 44.7° 33.9° 39.3° 6.17"
February 47.7° 34.6° 41.1° 3.37"
March 52.1° 37.7° 44.9° 4.21"
April 57.6° 41.9° 49.8° 2.97"
May 64.0° 47.3° 55.7° 2.57"
June 68.5° 52.1° 60.3° 1.93"
July 72.8° 55.1° 64.0° 1.14"
August 72.7° 54.9° 63.8° 1.13"
September 66.9° 50.4° 58.6° 2.22"
October 57.4° 44.0° 50.7° 4.39"
November 49.6° 37.9° 43.8° 6.08"
December 44.2° 34.1° 39.2° 5.63"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station BLAINE, WA US (ID: USC00450729) • 4.3 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 BLAINE, 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. 42.0 47.3 52.5 57.8 63.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 51.6°F 2012: Annual mean 50.9°F 2013: Annual mean 51.3°F 2015: Annual mean 53.6°F 2016: Annual mean 52.6°F 2019: Annual mean 51.0°F 2020: Annual mean 51.3°F 2010: Annual mean of daily highs 58.3°F 2012: Annual mean of daily highs 57.4°F 2013: Annual mean of daily highs 57.8°F 2015: Annual mean of daily highs 60.9°F 2016: Annual mean of daily highs 59.6°F 2019: Annual mean of daily highs 57.7°F 2020: Annual mean of daily highs 57.4°F 2010: Annual mean of daily lows 44.9°F 2012: Annual mean of daily lows 44.3°F 2013: Annual mean of daily lows 44.8°F 2015: Annual mean of daily lows 46.3°F 2016: Annual mean of daily lows 45.6°F 2019: Annual mean of daily lows 44.2°F 2020: Annual mean of daily lows 45.2°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 51.6 58.3 44.9
2011 Unavailable Unavailable Unavailable
2012 50.9 57.4 44.3
2013 51.3 57.8 44.8
2014 Unavailable Unavailable Unavailable
2015 53.6 60.9 46.3
2016 52.6 59.6 45.6
2017 Unavailable Unavailable Unavailable
2018 Unavailable Unavailable Unavailable
2019 51.0 57.7 44.2
2020 51.3 57.4 45.2
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.