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Get the monthly weather forecast for South San Francisco, CA, including daily high/low, historical averages, to help you plan ahead.
Jun 5, 2024 · December is the month when South San Francisco experiences its coldest temperatures, averaging a high of 55.6°F (13.1°C) and a low of 47.8°F (8.8°C). Humidity. The average relative humidity in December is 72%. Rainfall. In South San Francisco, during December, the rain falls for 7.7 days and regularly aggregates up to 0.71" (18mm) of precipitation.
In South San Francisco during December average daily high temperatures decrease from 59°F to 55°F and the fraction of time spent overcast or mostly cloudy increases from 49% to 53%.
South San Francisco in December usually receives high rainfall, averaging around 114 mm (show in inches) for the month. With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower.
Weather.com brings you the most accurate monthly weather forecast for South San Francisco, CA with average/record and high/low temperatures, precipitation and more.
Jun 5, 2024 · December, the first month of the winter in South San Francisco, is still a mild month, with an average temperature fluctuating between 55.6°F (13.1°C) and 47.8°F (8.8°C). December is the month when South San Francisco experiences its coldest temperatures, averaging a high of 55.6°F (13.1°C) and a low of 47.8°F (8.8°C).
South San Francisco starts January with an average high-temperature of a still moderate 56.3°F, hinting at a minimal fluctuation from December. Weather in January » Weather in February.
