Weather forecast for todayCastro Valley, CA

Weather forecast for today

Current condition 2:14 pm PDT

  • 84°F
  • Feels like:
    84°F
Sunny
Sunny
  • Precipitation: 0"
  • Wind: 8mphW 270°
  • Humidity: 24%
  • Dewpoint: 45°F
  • Pressure: 29.99"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
At the moment, in Castro Valley, the air is clear and fresh under a radiant sun.
The temperature is a moderately hot 84.2°F. The current temperature is almost at the maximum predicted 87.8°F for today.

Saturday Oct 17, 2026

  • 88°F
  • 54°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 11mphWNW 286°
  • Humidity: 25%
  • UV index: 4
  • Sunrise: 7:18 am PDT
  • Sunset: 6:28 pm PDT
  • ▼
On Saturday, October 17, sunny and dry conditions are anticipated.
Temperature changes will be remarkable, ranging from a high of a tropical 87.8°F to a low of a cool 53.6°F.
Temperatures are higher than average, more in line with September's norm of 79°F than with October's 72.5°F.
Sunrise was at 7:18 am and sunset will be at 6:28 pm; the daylight will last for 11h and 10min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 86°C.
Coldest hour: 12 am 61°C.

Chance of precipitation

Highest chance: 12 am 5%.

Hourly weather forecast

  • 3 pm
  • 86°F
  • Feels like:
    86°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphWNW 285°
  • Humidity: 23%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 4 pm
  • 84°F
  • Feels like:
    84°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 11mphWNW 289°
  • Humidity: 25%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 5 pm
  • 82°F
  • Feels like:
    82°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 10mphWNW 289°
  • Humidity: 29%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 77°F
  • Feels like:
    77°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 8mphWNW 290°
  • Humidity: 35%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:28 pm
  • 7 pm
  • 72°F
  • Feels like:
    72°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 6mphWNW 295°
  • Humidity: 43%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 68°F
  • Feels like:
    68°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphWNW 301°
  • Humidity: 52%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 pm
  • 66°F
  • Feels like:
    66°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 4mphWNW 284°
  • Humidity: 58%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 64°F
  • Feels like:
    64°F
Clear
Clear
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 4mphWNW 292°
  • Humidity: 63%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 11 pm
  • 63°F
  • Feels like:
    63°F
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 3mphW 275°
  • Humidity: 65%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 12 am
  • 61°F
  • Feels like:
    61°F
Clear
Clear
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 3mphNW 311°
  • Humidity: 67%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
For the remainder of Saturday, mostly cloudless and sunny weather is anticipated.
The temperature will be between the lowest temperature of 62.6°F and the highest temperature of 86°F. The hottest part of the day will be around 3 pm.
Today, the forecasted maximum will be more comparable to September's average high of 79°F than October's 72.5°F. The temperature low is forecasted to be comparable to the usual October value of 54.3°F.
Updated: Oct 17, 2026 @ 21:14:17 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The temperature at 2:14 pm PDT in Castro Valley is 84.2°F.

Today, sunshine is expected with little to no cloud cover.

Today, the highest temperature will be 87.8°F, while the lowest temperature will be 53.6°F.
Today, the highest temperature will be significantly higher than the average maximum of 72.5°F in October. The lowest temperature will be in line with the average low of 54.3°F.

On Saturday, in Castro Valley, sunrise was at 7:18 am and sunset will be at 6:28 pm (PDT).

In Castro Valley, the length of the day today will be 11h and 10min.

Castro Valley, California, USA

  • en: Castro Valley, California, USA
  • es: Castro Valley, California, EE.UU.
  • hr: Kastro Vali, Kalifornija, SAD
  • mk: Kastro Vali, Kalifornija, SAD
  • sr: Kastro Vali, Kalifornija, SAD
  • zh: 卡斯特罗谷, 加利福尼亚州, 美国
  • Latitude: 37.694097°
  • Longitude: -122.086352°
  • Elevation: 161 ft
  • Current time: 2:14pm PDT
  • Sunrise: 7:18 am PDT
  • Sunset: 6:28 pm PDT
  • Timezone: America/Los_Angeles

Nearby Castro Valley, California, USA

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