El SalvadorThe weather in December in San Francisco
It's hot in December in San Francisco with an average temperature of 31°C. Temperatures this month range from a low of 30°C to a high of 31°C. At night, you can expect temperatures between 17°C and 20°C.
December is an awesome month to be in San Francisco for sunny weather. You’ll have high temperatures and not much chance of rain this month.
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, El Salvador. 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 34°C in 2019, San Francisco reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 24°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of 11°C to a highest value of 23°C.
Rainfall amount
According to weather history, there is only 8 mm of precipitation in December. The wind speed is around 3 Bft, mostly coming from the Southeast.
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 | 31°C | 9°C |
| Max. temperature | 31°C | 12°C |
| Min. temperature | 17°C | -5°C |
| Total precipitation | 8 mm | 133 mm |
| Rainy days | 2 days | 17 days |
Start of December
The month of December starts in San Francisco with hot temps, averaging around 31°C during the day and nights around 20°C.
Mid December
By mid-December, daytime temps stay steady at around 31°C, with nights around 19°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of December
By the end of December, the average daytime temperature in San Francisco is around 31°C, while nighttime temps are about 18°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
The hurricane season in San Francisco runs from June to November.
Check out the climate of San Francisco for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in December in San Francisco, El Salvador. 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, El Salvador. 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
Have you been to San Francisco in December?
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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.