Live Weather & Forecast
Weather in South San Francisco
California, United States · Real-time conditions & 3-day outlook
12°C
Feels like 9°C
54°F / Feels 48°F
Partly cloudy
South San Francisco, California
🌙 Nighttime
Updated: 2026-04-12 03:15
Humidity
80%
Wind
40 km/h SW
Wind Gust
55 km/h
Pressure
1008 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0.01 mm
Cloud Cover
75%
Dew Point
6.5°C
Wind Degree
216°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
153.9 μg/m³
NO₂
3.5 μg/m³
O₃
89 μg/m³
SO₂
1.6 μg/m³
PM 2.5
6.6 μg/m³
PM 10
10.4 μg/m³
Today's Hourly Forecast
24-hour breakdown for South San Francisco, California
12 AM
11°
Overcast
1 AM
10°
Patchy rain nearby
2 AM
10°
Patchy rain nearby
3 AM
12°
Partly cloudy
4 AM
10°
Clear
5 AM
10°
Clear
6 AM
10°
Clear
7 AM
10°
Partly Cloudy
8 AM
11°
Patchy rain nearby
9 AM
12°
Light rain
10 AM
12°
Cloudy
11 AM
13°
Light rain
12 PM
13°
Patchy rain nearby
1 PM
13°
Moderate rain
2 PM
13°
Patchy rain nearby
3 PM
14°
Cloudy
4 PM
13°
Partly Cloudy
5 PM
13°
Light rain shower
6 PM
13°
Partly Cloudy
7 PM
12°
Partly Cloudy
8 PM
12°
Overcast
9 PM
12°
Partly Cloudy
10 PM
12°
Partly Cloudy
11 PM
12°
Patchy light drizzle
3-Day Forecast
Daily overview for South San Francisco, California
Today
Moderate rain
14°
/
9°
🌧️ 90% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 41 km/h
🌧️ Total precip: 13.08 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:38 AM
🌇 Sunset: 07:43 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Cloudy
14°
/
11°
🌧️ 0% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 22.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:37 AM
🌇 Sunset: 07:44 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Partly Cloudy
12°
/
9°
🌧️ 0% chance of rain
💧 Avg. humidity: 81%
💨 Max wind: 22 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:36 AM
🌇 Sunset: 07:45 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit South San Francisco
Plan your trip to South San Francisco, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in South San Francisco?
Current conditions in South San Francisco: Partly cloudy, temperature 12°C, humidity 80%.
What is the best time to visit South San Francisco?
The best time to visit South San Francisco is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in South San Francisco?
South San Francisco is located at approximately 37.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in South San Francisco?
The wettest period in South San Francisco is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to South San Francisco?
For visits to South San Francisco during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is South San Francisco in?
South San Francisco is located in United States, in the state of California.
What are the public holidays in South San Francisco in 2026?
View the 2026 public holidays for South San Francisco on our Holidays page.
What are the GPS coordinates used for the weather forecast in South San Francisco?
The weather forecast for South San Francisco uses coordinates 37.6535, -122.4169.