Weather forecast for todayCastro Valley, CA
Weather forecast for today
Current condition 2:14 pm PDT
- 84°F
- Feels like:84°F
Sunny
- Precipitation: 0"
- Wind: 8mphW 270°
- Humidity: 24%
- Dewpoint: 45°F
- Pressure: 29.99"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
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.
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
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphWNW 286°
- Humidity: 25%
- UV index: 4
- Sunrise: 7:18 am PDT
- Sunset: 6:28 pm PDT
- details ▼
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.
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.
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
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphWNW 285°
- Humidity: 23%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 4 pm
- 84°F
- Feels like:84°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphWNW 289°
- Humidity: 25%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 5 pm
- 82°F
- Feels like:82°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 10mphWNW 289°
- Humidity: 29%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 77°F
- Feels like:77°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphWNW 290°
- Humidity: 35%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:28 pm
- 7 pm
- 72°F
- Feels like:72°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 6mphWNW 295°
- Humidity: 43%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 8 pm
- 68°F
- Feels like:68°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphWNW 301°
- Humidity: 52%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 9 pm
- 66°F
- Feels like:66°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphWNW 284°
- Humidity: 58%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 64°F
- Feels like:64°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 4mphWNW 292°
- Humidity: 63%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 11 pm
- 63°F
- Feels like:63°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 3mphW 275°
- Humidity: 65%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 12 am
- 61°F
- Feels like:61°F
Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 3mphNW 311°
- Humidity: 67%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
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.
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
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.
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
- Cherryland (1 mi)
- Ashland (1 mi)
- Hayward (2 mi)
- San Lorenzo (2 mi)
- Fairview (2 mi)
- San Leandro (4 mi)
- Union City (7 mi)
- Dublin (8 mi)
- San Ramon (8 mi)
- Alameda (10 mi)
- Danville (10 mi)
- Moraga (10 mi)
- Canyon (11 mi)
- Piedmont Pines (11 mi)
- Fremont (11 mi)
- Newark (12 mi)
- Pleasanton (12 mi)
- Diablo (12 mi)
- Piedmont (12 mi)
- Oakland (12 mi)
- Sunol (13 mi)
- Blackhawk (13 mi)
- Lafayette (13 mi)
- Mowry Landing (14 mi)
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