South San Francisco, CA Weather Tomorrow

See tomorrow's forecast for South San Francisco together with a reliable 5 day outlook featuring precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the South San Francisco area and around San Mateo county, California.
Updated: Thu Aug 27th 2026 11:15 PM PDT
South San Francisco, CA Weather – 8-27 – Sunny
80° / 59°
Sunny
South San Francisco, CA Weather – 8-28 – Overcast
64° / 59°

Weather Tomorrow

Overcast
In South San Francisco, overcast is likely with a high near 64°F and a low around 59°F. There's a moderate 41% chance of rainfall with an estimated 0.02in. Wind will be moderate, blowing around 13mph on average and gusts of 17.9mph at 1 PM. High humidity with average of 82% is anticipated, the maximum being 91% at 6 AM and 74% being its lowest at 12 AM. Barometric pressure is its highest of 30.03inHg at 12 PM, a lowest point of 29.92inHg at 4 AM with an avg 29.97inHg.
South San Francisco, CA Weather – 8-29 – Sunny
63° / 58°
Sunny
It will be sunny in South San Francisco, with a high of 63°F and a low of 58°F. There might be light rainfall having a 13% chance. Wind will be moderate, blowing around 20mph on average and gusts of 31.3mph at 9 PM. High humidity with average of 82% is anticipated, the maximum being 90% at 4 AM and 72% being its lowest at 3 PM. Barometric pressure is its highest of 29.99inHg at 11 AM, a lowest point of 29.91inHg at 8 PM with an avg 29.95inHg.
South San Francisco, CA Weather – 8-30 – Sunny
63° / 57°
Sunny
In South San Francisco, sunshine is likely with a high near 63°F and a low around 57°F. There might be light rainfall having a 13% chance with an estimated 0in. Wind will be moderate, blowing around 17mph on average and gusts of 26mph at 12 AM. High humidity with average of 81% is anticipated, the maximum being 88% at 4 AM and 70% being its lowest at 2 PM. Barometric pressure is its highest of 29.95inHg at 10 AM, a lowest point of 29.87inHg at 8 PM with an avg 29.91inHg.
South San Francisco, CA Weather – 8-31 – Scattered Showers
63° / 58°
Scattered Showers
In South San Francisco, on and off showers are set to occur with highs near 63°F and lows around 58°F. There's a moderate 36% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 15mph on average and gusts of 17.5mph at 5 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 89% at 1 AM and 72% being its lowest at 2 PM. Barometric pressure is its highest of 29.92inHg at 11 AM, a lowest point of 29.85inHg at 3 AM with an avg 29.89inHg.
South San Francisco, CA Weather – 9-1 – Sunny
64° / 60°
Sunny
South San Francisco could see sunshine with daytime highs of 64°F and nighttime lows near 60°F. There might be light rainfall having a 22% chance with an estimated 0in. Wind will be moderate, blowing around 13mph on average and gusts of 16.8mph at 5 PM. The humidity will be on the higher side, averaging about 79%, the maximum being 88% at 11 PM and 71% being its lowest at 2 PM. Barometric pressure is its highest of 30inHg at 10 AM, a lowest point of 29.92inHg at 2 AM with an avg 29.96inHg.

Currently

Overcast 63°F
29.95 inHg.
Barometer
72%
Humidity
WSW 12.6 mph
Wind
Overcast

5 Day Forecast Nearby

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