Weather forecast for todaySan Mateo, CA

Weather forecast for today

Current condition 5:45 am PDT

  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precipitation: 0"
  • Wind: 0mphSE 130°
  • Humidity: 59%
  • Dewpoint: 43°F
  • Pressure: 30.05"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
In San Mateo, currently, an expansive clear sky makes for a picture-perfect day.
The temperature is a mild 57.2°F. The current temperature is almost at the minimum-predicted 55.4°F for today.

Saturday Oct 17, 2026

  • 82°F
  • 55°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 11mphNNW 335°
  • Humidity: 46%
  • UV index: 5
  • Sunrise: 7:19 am PDT
  • Sunset: 6:29 pm PDT
  • ▼
Today, on Saturday, October 17, expect sunny weather with a crisp, clear sky.
Day and night temperatures will sharply contrast, oscillating between a moderately hot 82.4°F and a moderate 55.4°F.
The maximum heat index, which reflects the perceived temperature due to humidity levels, is computed to be 82.4°F.
Meteorological data shows 82.4°F is more characteristic of September's climate profile than October's.
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 period: 2 pm - 4 pm 81°C.
Coldest period: 6 am - 8 am 57°C.

Chance of precipitation

Highest chance: 10 pm 4%.

Hourly weather forecast

  • 6 am
  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 1mphNNW 329°
  • Humidity: 60%
  • Pressure: 30.03"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 7 am
  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 1mphNNW 333°
  • Humidity: 64%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:19 am
  • 8 am
  • 57°F
  • Feels like:
    57°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 1mphNNW 333°
  • Humidity: 66%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 am
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphNNW 329°
  • Humidity: 55%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 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
  • ▼
  • 11 am
  • 72°F
  • Feels like:
    72°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphNNE 22°
  • Humidity: 43%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 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
  • ▼
  • 1 pm
  • 79°F
  • Feels like:
    79°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphN 355°
  • Humidity: 35%
  • 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
  • ▼
  • 3 pm
  • 82°F
  • Feels like:
    82°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphNW 313°
  • Humidity: 31%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 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
  • ▼
  • 5 pm
  • 79°F
  • Feels like:
    79°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 10mphWNW 299°
  • Humidity: 32%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 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
  • 7 pm
  • 72°F
  • Feels like:
    72°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphWNW 284°
  • Humidity: 45%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 68°F
  • Feels like:
    68°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 7mphWNW 285°
  • Humidity: 55%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 pm
  • 64°F
  • Feels like:
    64°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 6mphWNW 282°
  • Humidity: 63%
  • 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: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 11 pm
  • 63°F
  • Feels like:
    63°F
Clear
Clear
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 4mphW 269°
  • Humidity: 72%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, mainly sunny weather and a cloudless sky are anticipated.
The temperature will vary between the highest temperature of 82.4°F and the lowest temperature of 57.2°F. The warmest part of the day is expected around 3 pm.
The forecasted maximum is more consistent with September's typical high of 71.2°F than the average for October. Today, the lowest temperature will be consistent with October's usual minimum.
Updated: Oct 17, 2026 @ 12:45:09 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The current temperature (5:45 am PDT) is 57.2°F.

Today, in San Mateo, sunny skies are in store, with excellent visibility.

Today, the maximum temperature will be 82.4°F, while the minimum temperature will be 55.4°F. The maximum heat index, which combines air temperature and relative humidity, is estimated at 82.4°F.
The maximum temperature today will be notably higher than the average highest temperature of 67.8°F in October. Today, the lowest temperature will be in line with the average low temperature.

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

Today, the daylight will last for 11h and 10min.