San Francisco - Recent December Temperatures and Rainfall





The numbers here describe what the December weather in San Francisco, California was like for every year since 2010. A series of tables gives December data by year for temperature and precipitation.

They begin with average maximum and minimum temperatures in degrees Fahrenheit and Celsius. That's followed by how many hot or cold days occurred each December. Then there's information on how much rain actually landed this month during recent years, as well as how often San Francisco had wet weather.

The climate data come from weather measurements made in downtown San Francisco.

Temperature Weather iconTemperature

December temperature averages by year in San Francisco
High °F Low °F Year High °C Low °C
60 47 2020 15 9
58 50 2019 14 10
59 49 2018 15 10
61 48 2017 16 9
57 46 2016 14 8
56 47 2015 14 8
61 52 2014 16 11
59 45 2013 15 7
56 48 2012 14 9
58 46 2011 15 8
57 49 2010 14 10
Number of days in December when the temperature in San Francisco dropped to 32 or below, or rose to at least 70 degrees Fahrenheit
32 °F
0 °C
Year 70 °F
21 °C
0 2020 2
0 2019 0
0 2018 0
0 2017 0
0 2016 0
0 2015 0
0 2014 0
0 2013 0
0 2012 0
0 2011 1
0 2010 0

Rainy Weather iconRain

This table gives the total precipitation that fell on San Francisco during December in each year from 2010. The number of days with precipitation counts the days when rainfall amounted to 0.01 inches (0.3 millimeters) or more.

Total rainfall for December in San Francisco
Days Year Inches Milli­metres
7 2020 2.0 52
19 2019 4.9 125
10 2018 2.2 56
2 2017 0.2 4
8 2016 4.4 112
15 2015 5.2 132
17 2014 11.7 297
2 2013 0.4 10
16 2012 7.1 181
3 2011 0.1 4
19 2010 6.7 170
Reference

Jay Lawrimore. 2016. Global Summary of the Month, Version 1.0. NOAA National Centers for Environmental Information. 

San Francisco - Recent Years
San Francisco - Extremes
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