Weather in San Francisco in December 2024
Average weather
Average temperature in San Francisco in December
The temperature in December is +55°F on average, with a range between a maximum of +61°F during the day and a minimum of +37°F at night.
The average maximum temperature goes up 23% by the end of the month, compared with the beginning of the month, from +55°F to +61°F.
Is San Francisco warm or cold in December?
San Francisco is typically mild in December.
Maximum temperatures go down compared to the previous month from +63°F to +57°F. The minimum temperature also goes down from +48°F to +45°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
December is one of the coolest months in San Francisco, here is the comparison with other months:
Climate in San Francisco in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +63°F | +57°F | +57°F | ||||
| Min. temperature | ||||||
| +36°F | +25°F | +30°F | ||||
| Max. temperature | ||||||
| +81°F | +73°F | +75°F | ||||
| Rainfall | ||||||
| 64 mm | 115 mm | 109 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 80% | 80% | 82% | ||||
| Air pressure | ||||||
| 1017 HPa | 1018 HPa | 1018 HPa | ||||
| Sunny days | ||||||
| 8 | 7 | 5 | ||||
| Cloudy days | ||||||
| 17 | 16 | 18 | ||||
| Rainy days | ||||||
| 5 | 8 | 8 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
December weather is still as ok as in November. It’s getting colder in December. From +63°F in the day, the average maximum temperature lowers to +57°F. Prepare for more rain. Average rainfall goes from 64 mm to 115 mm. Humidity levels don’t change as the month goes on, averaging around 80%. The average wind speed doesn’t change much during December, staying around 2 m/s. The days becoming less sunny, going from 8 sunny days in November to 7 in December.
January brings much the same weather, it remains ok.
Wind
The average wind speed is 1 m/s getting up to 2 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in San Francisco is gradually increasing during December, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last December in San Francisco?
Climate Change Over the Years
The climate in San Francisco in December has not changed that much over the last 43 years.
The average temperature was the lowest in 1984 (+55°F) and the highest in 2020 (+63°F). The driest year was 1989 with only 0 mm of rainfall, and the wettest year was 2022 with 410 mm.
FAQ
Is December a good time to visit San Francisco?
Can you sunbathe in San Francisco in December?
Is San Francisco rainy in December?
Is it sunny in San Francisco in December?
Other cities in USA
Monthly weather in San Francisco
Source of the data
For this page, we’ve looked at the typical weather in San Francisco, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.