Live Weather & Forecast
Weather in San Mateo
California, United States · Real-time conditions & 3-day outlook
14°C
Feels like 12°C
57°F / Feels 53°F
Partly cloudy
San Mateo, California
🌞 Daytime
Updated: 2026-04-12 10:30
Humidity
72%
Wind
28.4 km/h SW
Wind Gust
45.6 km/h
Pressure
1012 mb
Visibility
16 km
UV Index
1.8
(Low)
Precipitation
1.22 mm
Cloud Cover
75%
Dew Point
8.3°C
Wind Degree
229°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
153.9 μg/m³
NO₂
3.7 μg/m³
O₃
89 μg/m³
SO₂
1.8 μg/m³
PM 2.5
6.8 μg/m³
PM 10
10.2 μg/m³
Today's Hourly Forecast
24-hour breakdown for San Mateo, 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
14°
Partly cloudy
11 AM
13°
Patchy rain nearby
12 PM
14°
Patchy rain nearby
1 PM
14°
Patchy rain nearby
2 PM
14°
Sunny
3 PM
14°
Cloudy
4 PM
14°
Cloudy
5 PM
14°
Light rain shower
6 PM
13°
Cloudy
7 PM
12°
Partly Cloudy
8 PM
12°
Overcast
9 PM
12°
Partly Cloudy
10 PM
11°
Partly Cloudy
11 PM
11°
Patchy rain nearby
3-Day Forecast
Daily overview for San Mateo, California
Today
Moderate rain
15°
/
9°
🌧️ 89% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 37.4 km/h
🌧️ Total precip: 5.39 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:38 AM
🌇 Sunset: 07:43 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Cloudy
15°
/
11°
🌧️ 0% chance of rain
💧 Avg. humidity: 78%
💨 Max wind: 21.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:37 AM
🌇 Sunset: 07:43 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Partly Cloudy
14°
/
10°
🌧️ 0% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 19.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:35 AM
🌇 Sunset: 07:44 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit San Mateo
Plan your trip to San Mateo, 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 San Mateo?
Current conditions in San Mateo: Partly cloudy, temperature 14°C, humidity 72%.
What is the best time to visit San Mateo?
The best time to visit San Mateo is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in San Mateo?
San Mateo is located at approximately 37.6° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in San Mateo?
The wettest period in San Mateo is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to San Mateo?
For visits to San Mateo during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is San Mateo in?
San Mateo is located in United States, in the state of California.
What are the public holidays in San Mateo in 2026?
View the 2026 public holidays for San Mateo on our Holidays page.
What are the GPS coordinates used for the weather forecast in San Mateo?
The weather forecast for San Mateo uses coordinates 37.563, -122.3253.