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SpainThe weather in December in San Francisco
It's cool to moderate in December in San Francisco with an average temperature of 18°C. Temperatures this month range from a low of 17°C to a high of 20°C. At night, you can expect temperatures between 9°C and 13°C.
Looking for great weather? December is a good time to be in San Francisco. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for San Francisco, Spain. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 27°C in 2023, San Francisco reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 12°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 1°C to a highest value of 18°C.
Rainfall amount
In December, there is an average of 51 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in December for San Francisco
Click on any day in December to get detailed info about the usual weather on that day in San Francisco. Check out the historical temperatures and precipitation over the past 10 years on this day.
December weather comparison
| San Francisco | New York | |
|---|---|---|
| Average temperature | 18°C | 9°C |
| Max. temperature | 20°C | 12°C |
| Min. temperature | 9°C | -5°C |
| Total precipitation | 51 mm | 133 mm |
| Rainy days | 8 days | 17 days |
Start of December
The month of December starts in San Francisco with mild temps, averaging around 19°C during the day and nights around 12°C.
Mid December
By mid-December, daytime temps stay steady at around 19°C, with nights around 11°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of December
By the end of December, the average daytime temperature in San Francisco is around 19°C, while nighttime temps are about 10°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
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UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of San Francisco for all months and discover the best travel time
Curious about the weather in other parts of Spain? Check out the climate and weather for spots like Ibiza, Majorca, Tenerife, or explore other destinations in Spain.
Temperature charts
These charts show the average temperatures in December in San Francisco, Spain. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in San Francisco
Temperature in December in San Francisco over the years
Precipitation charts
These charts show the average amount of precipitation in December in San Francisco, Spain. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in December in San Francisco
Total precipitation in December in San Francisco over the years
Daily UV index in December in San Francisco
This chart shows the average daily UV index in December in San Francisco, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in December in San Francisco
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Average weather in San Francisco by month
Click on a month below to see detailed weather info for San Francisco. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.