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Millbrae city, California

Official LSAD Designation: Millbrae city • Census GEOID: 0647486 • San Mateo County

Climate Normals & Weather Observations

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

Reference Weather Station: SAN FRANCISCO INTL AP, CA US (ID: USW00023234) • Located 2.5 miles from community center • Elevation: 2.4 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 58.0° 44.5° 51.3° 3.89"
February 60.8° 46.1° 53.5° 3.96"
March 63.4° 47.6° 55.5° 2.73"
April 65.6° 49.1° 57.3° 1.36"
May 68.3° 51.6° 59.9° 0.48"
June 71.5° 53.6° 62.5° 0.14"
July 72.6° 55.3° 64.0° 0.00"
August 73.4° 56.4° 64.9° 0.04"
September 74.8° 55.9° 65.3° 0.07"
October 72.3° 53.4° 62.9° 0.79"
November 64.3° 48.5° 56.4° 2.04"
December 58.2° 44.6° 51.4° 4.14"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station SAN FRANCISCO INTL AP, CA US (ID: USW00023234) • 2.5 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 SAN FRANCISCO INTL AP, CA 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. 47.0 53.3 59.5 65.8 72.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 58.6°F 2011: Annual mean 56.9°F 2012: Annual mean 57.6°F 2013: Annual mean 58.0°F 2014: Annual mean 62.0°F 2015: Annual mean 60.4°F 2016: Annual mean 59.7°F 2017: Annual mean 59.9°F 2019: Annual mean 59.8°F 2020: Annual mean 60.2°F 2021: Annual mean 59.5°F 2022: Annual mean 59.0°F 2023: Annual mean 59.6°F 2024: Annual mean 59.1°F 2025: Annual mean 58.9°F 2010: Annual mean of daily highs 65.5°F 2011: Annual mean of daily highs 64.2°F 2012: Annual mean of daily highs 64.9°F 2013: Annual mean of daily highs 66.0°F 2014: Annual mean of daily highs 69.6°F 2015: Annual mean of daily highs 67.9°F 2016: Annual mean of daily highs 66.8°F 2017: Annual mean of daily highs 67.6°F 2019: Annual mean of daily highs 67.6°F 2020: Annual mean of daily highs 68.9°F 2021: Annual mean of daily highs 66.9°F 2022: Annual mean of daily highs 67.0°F 2023: Annual mean of daily highs 66.9°F 2024: Annual mean of daily highs 66.6°F 2025: Annual mean of daily highs 65.9°F 2010: Annual mean of daily lows 51.7°F 2011: Annual mean of daily lows 49.7°F 2012: Annual mean of daily lows 50.2°F 2013: Annual mean of daily lows 50.1°F 2014: Annual mean of daily lows 54.4°F 2015: Annual mean of daily lows 52.9°F 2016: Annual mean of daily lows 52.5°F 2017: Annual mean of daily lows 52.2°F 2019: Annual mean of daily lows 51.9°F 2020: Annual mean of daily lows 51.5°F 2021: Annual mean of daily lows 52.0°F 2022: Annual mean of daily lows 51.0°F 2023: Annual mean of daily lows 52.4°F 2024: Annual mean of daily lows 51.6°F 2025: Annual mean of daily lows 52.0°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 58.6 65.5 51.7
2011 56.9 64.2 49.7
2012 57.6 64.9 50.2
2013 58.0 66.0 50.1
2014 62.0 69.6 54.4
2015 60.4 67.9 52.9
2016 59.7 66.8 52.5
2017 59.9 67.6 52.2
2018 Unavailable Unavailable Unavailable
2019 59.8 67.6 51.9
2020 60.2 68.9 51.5
2021 59.5 66.9 52.0
2022 59.0 67.0 51.0
2023 59.6 66.9 52.4
2024 59.1 66.6 51.6
2025 58.9 65.9 52.0
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.