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Weather in South San Francisco, United States 🇺🇸

Current Weather in South San Francisco

Beach Hazards Statement issued September 2 at 9:26PM PDT until September 7 at 11:00PM PDT by NWS San Francisco CA
Clear
12°C
Feels like 11°C. Clear.
🌬️ 9 km/h S
💧 84% Humidity
🧭 1014 hPa
👁️ 10.0 km Visibility
☀️ UV Index: 0.0
🌡️ Dew Point: 10°C
🌅 Sunrise: 06:41 AM
🌇 Sunset: 07:36 PM
Map Overlays:
Temperature Precipitation Pressure Wind Speed Clear

As of now, South San Francisco is 12°C and clear, feeling like 11°C. Expect 84% humidity and winds of about 9 km/h, and the UV index is 0 (low). Over the next few days, temperatures in South San Francisco range from about 12°C to 18°C. ⚠️ Beach Hazards Statement issued September 2 at 9:26PM PDT until September 7 at 11:00PM PDT by NWS San Francisco CA

Hourly Forecast for South San Francisco

07:00
Sunny
12°
11%
08:00
Cloudy
15°
24%
09:00
Overcast
18°
21%
10:00
Partly Cloudy
18°
13%
11:00
Overcast
18°
21%
12:00
Light drizzle
18°
46%
13:00
Light drizzle
17°
66%
14:00
Patchy rain nearby
17°
33%
15:00
Patchy rain nearby
17°
31%
16:00
Patchy rain nearby
17°
25%
17:00
Patchy rain nearby
17°
29%
18:00
Patchy rain nearby
17°
24%
19:00
Partly Cloudy
16°
15%
20:00
Cloudy
16°
23%
21:00
Clear
16°
11%
22:00
Clear
16°
12%
23:00
Clear
15°
12%
00:00
Clear
15°
11%
01:00
Clear
15°
11%
02:00
Clear
15°
11%
03:00
Clear
15°
10%
04:00
Clear
15°
10%
05:00
Clear
15°
9%
06:00
Clear
14°
9%

14-Day Forecast for South San Francisco

Thu, Sep 03
Sunny Sunny
18° / 12°
Fri, Sep 04
Sunny Sunny
18° / 14°
Sat, Sep 05
Sunny Sunny
17° / 14°
Sun, Sep 06
Sunny Sunny
17° / 14°
Mon, Sep 07
Sunny Sunny
18° / 14°
Tue, Sep 08
Patchy rain nearby Patchy rain nearby
20° / 14°
Wed, Sep 09
Sunny Sunny
18° / 14°
Thu, Sep 10
Sunny Sunny
17° / 15°
Fri, Sep 11
Sunny Sunny
17° / 14°
Sat, Sep 12
Sunny Sunny
17° / 15°
Sun, Sep 13
Sunny Sunny
18° / 14°
Mon, Sep 14
Sunny Sunny
19° / 14°
Tue, Sep 15
Overcast Overcast
18° / 14°
Wed, Sep 16
Sunny Sunny
18° / 14°

Additional Forecasts for South San Francisco

Air Quality

💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 133.0 μg/m³
O₃ (Ozone) 50.0 μg/m³
NO₂ (Nitrogen Dioxide) 7.2 μg/m³
SO₂ (Sulphur Dioxide) 1.5 μg/m³
PM2.5 (Fine particles) 9.9 μg/m³
PM10 (Coarse particles) 15.1 μg/m³

Historical Weather

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Best Time to Be Outside in South San Francisco Today

The most comfortable window in South San Francisco today looks like 09:00 to 12:00, when it is around 18°C. It should stay dry through that window. The next likely rain is around 13:00.

Frequently Asked Questions about Weather in South San Francisco

What is the temperature in South San Francisco right now?

South San Francisco is sitting at 12°C (54°F) right now, clear (feels like 11°C).

What's the weather like in South San Francisco right now?

Current weather in South San Francisco: Clear, humidity 84%, wind 9 km/h S.

What is today's forecast for South San Francisco?

Today in South San Francisco: high 18°C, low 12°C, sunny. Chance of rain: 57%.

What is the 7-day weather forecast for South San Francisco?

Daily highs and lows for South San Francisco:

  • 2026-09-03: 18°C / 12°C
  • 2026-09-04: 18°C / 14°C
  • 2026-09-05: 17°C / 14°C
  • 2026-09-06: 17°C / 14°C
  • 2026-09-07: 18°C / 14°C
  • 2026-09-08: 20°C / 14°C
  • 2026-09-09: 18°C / 14°C
Is it going to rain in South San Francisco today?

There is a 57% chance of rain in South San Francisco today. Total expected precipitation: 0.99 mm.

What is the wind speed in South San Francisco right now?

Wind in South San Francisco is currently 9 km/h (6 mph) from the S.

What is the UV index in South San Francisco right now?

The UV index in South San Francisco is currently 0 (low). Sun protection is recommended when the index is 3 or higher.

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