Live Weather & Forecast
Weather in Foster City
California, United States · Real-time conditions & 3-day outlook
16°C
Feels like 16°C
61°F / Feels 61°F
Partly cloudy
Foster City, California
🌞 Daytime
Updated: 2026-04-12 17:15
Humidity
63%
Wind
24.1 km/h WSW
Wind Gust
27.8 km/h
Pressure
1014 mb
Visibility
16 km
UV Index
1.7
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
10.3°C
Wind Degree
252°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
149.9 μg/m³
NO₂
15.4 μg/m³
O₃
69 μg/m³
SO₂
2.7 μg/m³
PM 2.5
8.8 μg/m³
PM 10
11.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for Foster City, California
12 AM
10°
Clear
1 AM
10°
Clear
2 AM
10°
Patchy rain nearby
3 AM
10°
Light drizzle
4 AM
10°
Overcast
5 AM
10°
Patchy rain nearby
6 AM
10°
Clear
7 AM
10°
Sunny
8 AM
11°
Patchy rain nearby
9 AM
12°
Light rain
10 AM
12°
Patchy rain nearby
11 AM
14°
Moderate rain
12 PM
14°
Patchy rain nearby
1 PM
15°
Cloudy
2 PM
15°
Partly Cloudy
3 PM
16°
Sunny
4 PM
16°
Partly Cloudy
5 PM
16°
Partly cloudy
6 PM
15°
Sunny
7 PM
13°
Sunny
8 PM
12°
Clear
9 PM
11°
Clear
10 PM
11°
Clear
11 PM
10°
Patchy rain nearby
3-Day Forecast
Daily overview for Foster City, California
Today
Moderate rain
16°
/
9°
🌧️ 89% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 37.4 km/h
🌧️ Total precip: 8.59 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:38 AM
🌇 Sunset: 07:43 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Patchy rain nearby
17°
/
9°
🌧️ 79% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 23.4 km/h
🌧️ Total precip: 0.55 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:37 AM
🌇 Sunset: 07:43 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Cloudy
14°
/
9°
🌧️ 0% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 22.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:35 AM
🌇 Sunset: 07:44 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Foster City
Plan your trip to Foster City, 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 Foster City?
Current conditions in Foster City: Partly cloudy, temperature 16°C, humidity 63%.
What is the best time to visit Foster City?
The best time to visit Foster City is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Foster City?
Foster City is located at approximately 37.6° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Foster City?
The wettest period in Foster City is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Foster City?
For visits to Foster City during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Foster City in?
Foster City is located in United States, in the state of California.
What are the public holidays in Foster City in 2026?
View the 2026 public holidays for Foster City on our Holidays page.
What are the GPS coordinates used for the weather forecast in Foster City?
The weather forecast for Foster City uses coordinates 37.56, -122.2689.