What is the weather in San Mateo right now?

Current weather in San Mateo is broken clouds.

Where can I find the hourly weather forecast for San Mateo?

This page shows hourly weather forecast for San Mateo, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for San Mateo updated regularly?

Weather data for San Mateo is updated regularly with the latest available observations and forecasts.

Now · 4:38 AM

San Mateo Weather & Hourly Forecast

United States · California · 94403

60°F

Mostly cloudy night

Feels like: 60°F

💧 Humidity 82% 🌡 Pressure 30.00 inHg 💨 Wind 5 mph 👁 Visibility 6.2 mi ☁ Clouds 83% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:40 AM 🌇 Sunset 7:37 PM

Hourly Forecast for San Mateo

Today

5:00 AM

Mostly cloudy night

60° 💧 None 💨 5 mph H 82%30.00 inHg

8:00 AM

Overcast

61° 💧 None 💨 4 mph H 80%30.03 inHg

11:00 AM

Mostly cloudy

73° 💧 None 💨 3 mph H 68%30.06 inHg

2:00 PM

Partly cloudy

76° 💧 None 💨 10 mph H 66%30.03 inHg

5:00 PM

Mostly cloudy

70° 💧 None 💨 10 mph H 72%30.00 inHg

8:00 PM

Partly cloudy night

65° 💧 None 💨 5 mph H 86%30.00 inHg

11:00 PM

Partly cloudy night

63° 💧 None 💨 4 mph H 91%30.03 inHg

Tomorrow

2:00 AM

Clear night

61° 💧 None 💨 3 mph H 90%30.00 inHg

5:00 AM

Clear night

60° 💧 None 💨 4 mph H 89%29.97 inHg

8:00 AM

Sunny

63° 💧 None 💨 5 mph H 81%29.97 inHg

11:00 AM

Sunny

74° 💧 None 💨 6 mph H 67%29.94 inHg

2:00 PM

Light rain

74° 💧 0.01 in 💨 11 mph H 80%29.91 inHg

5:00 PM

Overcast

68° 💧 None 💨 8 mph H 85%29.88 inHg

8:00 PM

Partly cloudy night

60° 💧 None 💨 5 mph H 91%29.91 inHg

11:00 PM

Partly cloudy night

58° 💧 None 💨 4 mph H 93%29.91 inHg

Friday

2:00 AM

Clear night

57° 💧 None 💨 3 mph H 92%29.91 inHg

Today

5:00 AM

Mostly cloudy night

60° 💧 None 💨 5 mph H 82%30.00 inHg

6:00 AM

Overcast night

60° 💧 None 💨 5 mph H 82%30.00 inHg

7:00 AM

Overcast

60° 💧 None 💨 6 mph H 83%30.00 inHg

8:00 AM

Overcast

61° 💧 None 💨 4 mph H 80%30.03 inHg

9:00 AM

Overcast

65° 💧 None 💨 4 mph H 78%30.06 inHg

10:00 AM

Overcast

70° 💧 None 💨 3 mph H 72%30.06 inHg

11:00 AM

Mostly cloudy

73° 💧 None 💨 3 mph H 68%30.06 inHg

12:00 PM

Mostly cloudy

75° 💧 None 💨 6 mph H 68%30.06 inHg

1:00 PM

Partly cloudy

77° 💧 None 💨 9 mph H 67%30.03 inHg

2:00 PM

Partly cloudy

76° 💧 None 💨 10 mph H 66%30.03 inHg

3:00 PM

Mostly cloudy

74° 💧 None 💨 11 mph H 68%30.03 inHg

4:00 PM

Mostly cloudy

73° 💧 None 💨 11 mph H 70%30.00 inHg

5:00 PM

Mostly cloudy

70° 💧 None 💨 10 mph H 72%30.00 inHg

6:00 PM

Partly cloudy

69° 💧 None 💨 10 mph H 73%30.00 inHg

7:00 PM

Partly cloudy

67° 💧 None 💨 7 mph H 77%30.00 inHg

8:00 PM

Partly cloudy night

65° 💧 None 💨 5 mph H 86%30.00 inHg

9:00 PM

Partly cloudy night

64° 💧 None 💨 4 mph H 89%30.03 inHg

10:00 PM

Partly cloudy night

64° 💧 None 💨 4 mph H 90%30.03 inHg

11:00 PM

Partly cloudy night

63° 💧 None 💨 4 mph H 91%30.03 inHg

Tomorrow

12:00 AM

Clear night

62° 💧 None 💨 3 mph H 91%30.00 inHg

1:00 AM

Clear night

61° 💧 None 💨 3 mph H 90%30.00 inHg

2:00 AM

Clear night

61° 💧 None 💨 3 mph H 90%30.00 inHg

3:00 AM

Clear night

60° 💧 None 💨 3 mph H 89%29.97 inHg

4:00 AM

Clear night

60° 💧 None 💨 4 mph H 89%29.97 inHg

5:00 AM

Clear night

60° 💧 None 💨 4 mph H 89%29.97 inHg

6:00 AM

Clear night

60° 💧 None 💨 4 mph H 89%29.94 inHg

7:00 AM

Sunny

61° 💧 None 💨 5 mph H 89%29.94 inHg

8:00 AM

Sunny

63° 💧 None 💨 5 mph H 81%29.97 inHg

9:00 AM

Sunny

67° 💧 None 💨 5 mph H 73%29.94 inHg

10:00 AM

Sunny

71° 💧 None 💨 5 mph H 69%29.94 inHg

11:00 AM

Sunny

74° 💧 None 💨 6 mph H 67%29.94 inHg

12:00 PM

Mostly cloudy

76° 💧 None 💨 10 mph H 68%29.94 inHg

1:00 PM

Mostly cloudy

77° 💧 None 💨 12 mph H 70%29.91 inHg

2:00 PM

Light rain

74° 💧 0.01 in 💨 11 mph H 80%29.91 inHg

3:00 PM

Overcast

71° 💧 None 💨 9 mph H 88%29.91 inHg

4:00 PM

Overcast

69° 💧 None 💨 8 mph H 91%29.91 inHg

5:00 PM

Overcast

68° 💧 None 💨 8 mph H 85%29.88 inHg

6:00 PM

Mostly cloudy

64° 💧 None 💨 8 mph H 83%29.88 inHg

7:00 PM

Partly cloudy

63° 💧 None 💨 7 mph H 86%29.91 inHg

8:00 PM

Partly cloudy night

60° 💧 None 💨 5 mph H 91%29.91 inHg

9:00 PM

Partly cloudy night

60° 💧 None 💨 5 mph H 90%29.91 inHg

10:00 PM

Partly cloudy night

59° 💧 None 💨 5 mph H 91%29.91 inHg

11:00 PM

Partly cloudy night

58° 💧 None 💨 4 mph H 93%29.91 inHg

Friday

12:00 AM

Clear night

57° 💧 None 💨 3 mph H 93%29.91 inHg

1:00 AM

Clear night

57° 💧 None 💨 3 mph H 93%29.91 inHg

2:00 AM

Clear night

57° 💧 None 💨 3 mph H 92%29.91 inHg

3:00 AM

Clear night

56° 💧 None 💨 3 mph H 91%29.91 inHg

4:00 AM

Clear night

56° 💧 None 💨 4 mph H 90%29.91 inHg

5:00 AM

Clear night

56° 💧 None 💨 4 mph H 89%29.91 inHg

6:00 AM

Clear night

55° 💧 None 💨 3 mph H 88%29.91 inHg

7:00 AM

Sunny

55° 💧 None 💨 3 mph H 86%29.94 inHg

8:00 AM

Sunny

58° 💧 None 💨 3 mph H 78%29.94 inHg

9:00 AM

Sunny

62° 💧 None 💨 3 mph H 68%29.94 inHg

10:00 AM

Sunny

64° 💧 None 💨 4 mph H 61%29.94 inHg

11:00 AM

Sunny

65° 💧 None 💨 6 mph H 56%29.94 inHg

12:00 PM

Sunny

66° 💧 None 💨 8 mph H 54%29.94 inHg

1:00 PM

Sunny

66° 💧 None 💨 10 mph H 52%29.94 inHg

2:00 PM

Sunny

67° 💧 None 💨 10 mph H 50%29.94 inHg

3:00 PM

Sunny

68° 💧 None 💨 11 mph H 50%29.91 inHg

4:00 PM

Sunny

67° 💧 None 💨 14 mph H 52%29.91 inHg

5:00 PM

Sunny

65° 💧 None 💨 13 mph H 56%29.91 inHg

6:00 PM

Sunny

64° 💧 None 💨 11 mph H 60%29.91 inHg

7:00 PM

Sunny

61° 💧 None 💨 10 mph H 70%29.91 inHg

8:00 PM

Clear night

58° 💧 None 💨 7 mph H 83%29.91 inHg

9:00 PM

Clear night

57° 💧 None 💨 6 mph H 87%29.94 inHg

10:00 PM

Clear night

57° 💧 None 💨 5 mph H 87%29.94 inHg

11:00 PM

Clear night

56° 💧 None 💨 5 mph H 87%29.94 inHg

Saturday

12:00 AM

Clear night

56° 💧 None 💨 4 mph H 88%29.94 inHg

1:00 AM

Clear night

56° 💧 None 💨 4 mph H 89%29.94 inHg

2:00 AM

Clear night

55° 💧 None 💨 4 mph H 89%29.91 inHg

3:00 AM

Clear night

55° 💧 None 💨 4 mph H 90%29.91 inHg

4:00 AM

Clear night

55° 💧 None 💨 4 mph H 90%29.91 inHg

5:00 AM

Clear night

55° 💧 None 💨 4 mph H 90%29.91 inHg

6:00 AM

Clear night

55° 💧 None 💨 4 mph H 91%29.94 inHg

7:00 AM

Sunny

55° 💧 None 💨 4 mph H 91%29.94 inHg

8:00 AM

Sunny

58° 💧 None 💨 4 mph H 86%29.97 inHg

9:00 AM

Sunny

61° 💧 None 💨 5 mph H 80%29.97 inHg

10:00 AM

Sunny

63° 💧 None 💨 5 mph H 73%29.97 inHg

11:00 AM

Sunny

65° 💧 None 💨 6 mph H 67%29.97 inHg

12:00 PM

Sunny

66° 💧 None 💨 8 mph H 62%29.97 inHg

1:00 PM

Sunny

67° 💧 None 💨 9 mph H 58%29.94 inHg

2:00 PM

Sunny

68° 💧 None 💨 11 mph H 56%29.94 inHg

3:00 PM

Sunny

68° 💧 None 💨 12 mph H 55%29.94 inHg

4:00 PM

Sunny

67° 💧 None 💨 13 mph H 59%29.94 inHg

5:00 PM

Sunny

66° 💧 None 💨 13 mph H 63%29.94 inHg

6:00 PM

Sunny

64° 💧 None 💨 10 mph H 67%29.94 inHg

7:00 PM

Sunny

62° 💧 None 💨 8 mph H 73%29.94 inHg

8:00 PM

Clear night

58° 💧 None 💨 8 mph H 84%29.94 inHg

9:00 PM

Clear night

57° 💧 None 💨 6 mph H 87%29.97 inHg

10:00 PM

Mostly clear night

57° 💧 None 💨 5 mph H 87%29.97 inHg

11:00 PM

Partly cloudy night

56° 💧 None 💨 5 mph H 88%29.97 inHg

Sunday

12:00 AM

Overcast night

56° 💧 None 💨 5 mph H 89%29.97 inHg

1:00 AM

Mostly cloudy night

56° 💧 None 💨 4 mph H 90%29.94 inHg

2:00 AM

Overcast night

55° 💧 None 💨 4 mph H 91%29.94 inHg

3:00 AM

Mostly cloudy night

55° 💧 None 💨 4 mph H 91%29.94 inHg

4:00 AM

Mostly cloudy night

55° 💧 None 💨 4 mph H 91%29.94 inHg

In San Mateo and, more broadly, across the state of California: Clear skies will persist through the evening, with temperatures remaining mild to warm, ranging from 70 to 77 degrees Fahrenheit. Winds from the northwest will be noticeable, with sustained speeds up to 19 mph and gusts reaching 36 mph. No precipitation is expected during this time, making for a dry and comfortable evening. It’s a good idea to be mindful of the gusty winds, especially for outdoor plans or activities. Temperatures will gradually cool but stay within the comfortable range as the night progresses. Overall, expect a clear and breezy evening with no weather-related concerns.

15-Day Weather Outlook for San Mateo

TomorrowTomorrow

Light rain 72°/58° 💧 0.01 in 💨 9 mph

Friday, Sep 4Fri Sep 4

Sunny 67°/54° 💧 None 💨 13 mph

Saturday, Sep 5Sat Sep 5

Sunny 68°/55° 💧 None 💨 11 mph

Sunday, Sep 6Sun Sep 6

Sunny 68°/55° 💧 None 💨 12 mph

Monday, Sep 7Mon Sep 7

Sunny 68°/55° 💧 None 💨 12 mph

Tuesday, Sep 8Tue Sep 8

Overcast 73°/56° 💧 None 💨 7 mph

Wednesday, Sep 9Wed Sep 9

Overcast 73°/60° 💧 None 💨 8 mph

Thursday, Sep 10Thu Sep 10

Overcast 72°/59° 💧 None 💨 7 mph

Friday, Sep 11Fri Sep 11

Sunny 71°/57° 💧 None 💨 9 mph

Saturday, Sep 12Sat Sep 12

Sunny 72°/58° 💧 None 💨 9 mph

Sunday, Sep 13Sun Sep 13

Mostly sunny 72°/58° 💧 None 💨 10 mph

Monday, Sep 14Mon Sep 14

Sunny 71°/57° 💧 None 💨 10 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 71°/57° 💧 None 💨 10 mph

Wednesday, Sep 16Wed Sep 16

Overcast 67°/57° 💧 None 💨 10 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 69°/58° 💧 None 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in San Mateo

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for San Mateo

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 5:00 AM

PM2.5 Fine particles Good 1,7µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 4,7µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 86,9µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,8µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in San Mateo

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 6,9High 🙂Fair

Tomorrow UV 3,7Moderate 🙂Fair

Friday UV 7,6High 🙂Fair

Saturday UV 7,6High 🙂Fair

Sunday UV 6,0High 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 6,0High —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,4 9:00 AMUV 1,2 10:00 AMUV 2,7 11:00 AMUV 4,6 12:00 PMUV 6,2 1:00 PMUV 6,5 2:00 PMUV 6,9 3:00 PMUV 5,7 4:00 PMUV 3,8 5:00 PMUV 1,9 6:00 PMUV 0,7

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for San Mateo

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 4.75 Population: 103,105

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Forecast data for San Mateo were last refreshed today at 4:38 AM. The current forecast period extends through 04/09/2026 at 2:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.