Weather forecast for todaySan Mateo, CA

Weather forecast for today

Current condition 4:43 am PDT

  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precipitation: 0"
  • Wind: 2mphSW 220°
  • Humidity: 59%
  • Dewpoint: 43°F
  • Pressure: 30.05"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
At the moment, in San Mateo, no clouds in sight, just a completely clear atmosphere.
The temperature is a mild 57.2°F. The current temperature is almost at the minimum-expected 55.4°F for today.

Saturday Oct 17, 2026

  • 82°F
  • 55°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 11mphNNW 336°
  • Humidity: 46%
  • UV index: 5
  • Sunrise: 7:19 am PDT
  • Sunset: 6:29 pm PDT
  • ▼
Today, in San Mateo, a sun-drenched sky is anticipated.
Temperature changes will be considerable, from a high of a temperate 82.4°F to a low of a moderate 55.4°F.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is calculated to be 82.4°F.
The temperature of 82.4°F aligns more with what is typical in September than what is normal in October.
Sunrise will be at 7:19 am and sunset at 6:29 pm; the daylight will last for 11h and 10min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 81°C.
Coldest period: 5 am - 7 am 57°C.

Chance of precipitation

Highest chance: 11 pm 5%.

Hourly weather forecast

  • 6 am
  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphNW 326°
  • Humidity: 62%
  • Pressure: 30.03"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:19 am
  • 8 am
  • 59°F
  • Feels like:
    59°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 1mphNNW 333°
  • Humidity: 65%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 70°F
  • Feels like:
    70°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphNNE 23°
  • Humidity: 48%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 12 pm
  • 75°F
  • Feels like:
    75°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphNNE 17°
  • Humidity: 39%
  • Pressure: 30.03"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 2 pm
  • 81°F
  • Feels like:
    81°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphNNW 335°
  • Humidity: 33%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 4 pm
  • 81°F
  • Feels like:
    81°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphNW 306°
  • Humidity: 31%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 6 pm
  • 75°F
  • Feels like:
    75°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 11mphWNW 290°
  • Humidity: 38%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:29 pm
  • 8 pm
  • 68°F
  • Feels like:
    68°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 7mphWNW 285°
  • Humidity: 56%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 63°F
  • Feels like:
    63°F
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 5mphW 275°
  • Humidity: 68%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, in San Mateo, mainly sunny weather and a cloudless sky are anticipated.
The temperature will be between the lowest temperature of 57.2°F and the highest temperature of 80.6°F. The warmest part of the day will be from 2 pm to 4 pm.
The maximum temperature will align more closely with September's average high of 71.2°F than with October's 67.8°F. The night temperature will be similar to the standard October low of 55.2°F.
Updated: Oct 17, 2026 @ 11:43:09 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Currently (4:43 am PDT) it is 57.2°F in San Mateo.

On Saturday, sunshine will likely continue with scattered clouds at most.

Today, the maximum temperature will be 82.4°F, while the minimum temperature will be 55.4°F. The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is evaluated at 82.4°F.
The maximum temperature today will be significantly higher than the average highest temperature of 67.8°F in October. The lowest temperature will be in line with the average low of 55.2°F.

On Saturday, in San Mateo, sunrise will be at 7:19 am and sunset at 6:29 pm (PDT).

In San Mateo, today, there will be 11h and 10min of daylight.