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Half Moon Bay Weather Records

Half Moon Bay, California weather data and records from 1939–2022 based on data compiled by the NOAA.
All data displayed in U.S. customary units.
All data displayed in metric units.
All-Time Recorded High
The highest temperature ever recorded in Half Moon Bay, California was 93.9 °F34.4 °C which occurred on October 27, 2003.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Half Moon Bay, California was 19.0 °F-7.2 °C which occurred on December 23, 1990.
Lowest Temperatures: All-Time By Year
Half Moon Bay Weather by Month
Averages based on the years 1991–2020
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
☀️ Average high (°F°C) 59.615.3 60.015.6 60.515.8 61.216.2 62.216.8 63.817.7 65.018.3 65.918.8 66.519.1 66.419.1 62.516.9 59.515.3 62.817.1
🌙 Average low (°F°C) 43.26.2 43.16.1 43.86.6 44.77.1 48.19.0 50.210.1 53.011.7 53.912.1 51.510.8 48.08.9 44.67.0 42.86.0 47.38.5
☀️ Record high (°F°C) 75.924.4 78.125.6 82.928.3 84.028.9 82.027.8 89.131.7 81.027.2 88.031.1 91.933.3 93.934.4 87.130.6 79.026.1 93.934.4
🌙 Record low (°F°C) 27.0-2.8 21.9-5.6 28.0-2.2 30.9-0.6 33.10.6 36.02.2 39.94.4 41.05.0 35.11.7 33.10.6 30.0-1.1 19.0-7.2 19.0-7.2
💧 Average precipitation (inchescm) 5.012.8 4.711.8 3.58.9 1.84.7 1.02.5 0.40.9 0.20.4 0.20.6 0.20.6 1.33.3 2.56.3 4.711.8 25.364.4
💧 Daily % chance precipitation 46.4 46.5 43.7 29.3 23.1 17.6 22.7 23.9 20.3 24.4 37.1 43.2 31.6
❄️ Average snow (inchescm) 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0 0.00.0
More Half Moon Bay Weather Records
1939–2022
Highest daily low 70.0 °F21.1 °C September 19, 1983
Lowest daily high 37.0 °F2.8 °C December 9, 1972
Most daily precipitation 5.5 inches14.0 cm December 16, 2002
Most monthly precipitation 15.7 inches39.9 cm February 1998
Most yearly precipitation 52.3 inches132.9 cm 1983
Earliest freeze November 9 2020
Latest freeze April 30 2008
Most daily snow none -
Half Moon Bay Weather Streaks
Most consecutive days...
With precipitation 20 days Feb 26 – Mar 17, 2006
Without precipitation 168 days May 1 – Oct 15, 1978
High temperature ≥ 80 °F27 °C 5 days Oct 21–25, 1965
Half Moon Bay Weather by Year
More
Weather Station Details
Years Station Coordinates
1939–2022 Half Moon Bay location