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San Francisco Weather Records

San Francisco, California weather data and records from 1921–2022 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 San Francisco, California was 106.0 °F41.1 °C which occurred on September 1, 2017.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in San Francisco, California was 27.0 °F-2.8 °C which occurred on December 11, 1932.
Lowest Temperatures: All-Time By Year
San Francisco 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) 58.414.7 61.016.1 62.817.1 63.717.6 64.718.2 67.219.5 67.119.5 68.620.3 70.821.6 70.421.3 64.217.9 58.514.7 64.818.2
🌙 Average low (°F°C) 46.98.3 48.29.0 49.29.5 49.910.0 51.710.9 53.311.8 54.712.6 55.813.2 55.913.3 54.712.6 50.910.5 47.28.4 51.510.9
☀️ Record high (°F°C) 79.026.1 81.027.2 87.130.6 93.934.4 97.036.1 102.939.4 99.037.2 98.136.7 106.041.1 102.038.9 86.030.0 75.924.4 106.041.1
🌙 Record low (°F°C) 30.0-1.1 30.9-0.6 35.11.7 39.94.4 43.06.1 46.98.3 46.98.3 48.08.9 48.08.9 43.06.1 39.03.9 27.0-2.8 27.0-2.8
💧 Average precipitation (inchescm) 4.411.2 4.411.1 3.28.0 1.64.1 0.71.8 0.20.5 0.00.0 0.10.1 0.10.3 0.92.4 2.66.6 4.812.1 22.958.1
💧 Daily % chance precipitation 36.0 38.0 34.7 22.8 12.8 5.2 2.2 3.7 3.9 11.3 26.2 37.6 19.4
More San Francisco Weather Records
1921–2022
Highest daily low 75.0 °F23.9 °C September 2, 2017
Lowest daily high 35.1 °F1.7 °C December 11, 1932
Most daily precipitation 5.5 inches14.1 cm November 5, 1994
Most monthly precipitation 14.9 inches37.8 cm February 1998
Most yearly precipitation 43.8 inches111.2 cm 1983
Earliest freeze December 9 1972
Latest freeze February 6 1989
San Francisco Weather Streaks
Most consecutive days...
With precipitation 19 days Jan 27 – Feb 14, 1938
Without precipitation 142 days May 4 – Sep 22, 1930
High temperature ≥ 80 °F27 °C 8 days Oct 4–11, 1992
High temperature ≥ 90 °F32 °C 4 days Oct 25–28, 2003
Facts About San Francisco Weather
  • It almost never rains in San Francisco in July. During the entire thirty year period from 1991–2020, San Francisco received a total of less of 1" of rain during the month of July. Even Death Valley gets more rain than San Francisco in July.
San Francisco Weather by Year
More
Weather Station Details
Years Station Coordinates
1921–2022 Downtown San Francisco location