Weather forecast for todayCastro Valley, CA

Weather forecast for today

Current condition 7:51 pm PST

• 55°F
• Feels like:
  55°F

Clear

• Precipitation: 0"
• Wind: 2mphW 280°
• Humidity: 74%
• Dewpoint: 48°F
• Pressure: 30.03"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

At the moment, perfect visibility under a vast, clear sky.
The temperature is a mild 55.4°F. The current temperature is a few degrees off the minimum of 48.2°F.

Friday Oct 23, 2026

• min.
• 48°F

Clear

• Precip. probability: 4%
• Precipitation: 0"
• Wind: 4mphNNE 25°
• Humidity: 71%
• UV index: 0
• Sunrise: 7:24 am PDT
• Sunset: 6:20 pm PDT
• details ▼

In Castro Valley, for the rest of Friday, the sky will remain completely clear.
The lowest temperature will be a brisk 48.2°F.
Sunrise was at 7:24 am and sunset at 6:20 pm; the daylight lasted for 10h and 56min.

Hourly overview

Hourly weather forecast

• 9 pm

• 57°F
• Feels like:
  57°F

Clear

• Precip. probability: 2%
• Precipitation: 0"
• Wind: 2mphNW 306°
• Humidity: 73%
• Pressure: 30"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 10 pm

• 55°F
• Feels like:
  55°F

Clear

• Precip. probability: 2%
• Precipitation: 0"
• Wind: 1mphWNW 303°
• Humidity: 73%
• Pressure: 30.03"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 11 pm

• 54°F
• Feels like:
  54°F

Clear

• Precip. probability: 2%
• Precipitation: 0"
• Wind: 2mphNW 308°
• Humidity: 70%
• Pressure: 30.03"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 12 am

• 54°F
• Feels like:
  54°F

Clear

• Precip. probability: 2%
• Precipitation: 0"
• Wind: 2mphNNE 23°
• Humidity: 72%
• Pressure: 30"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 1 am

• 54°F
• Feels like:
  54°F

Clear

• Precip. probability: 2%
• Precipitation: 0"
• Wind: 2mphNNE 19°
• Humidity: 73%
• Pressure: 30"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 2 am

• 52°F
• Feels like:
  52°F

Clear

• Precip. probability: 2%
• Precipitation: 0"
• Wind: 3mphENE 60°
• Humidity: 72%
• Pressure: 30"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 3 am

• 52°F
• Feels like:
  50°F

Clear

• Precip. probability: 2%
• Precipitation: 0"
• Wind: 4mphENE 65°
• Humidity: 71%
• Pressure: 30"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 4 am

• 50°F
• Feels like:
  50°F

Clear

• Precip. probability: 4%
• Precipitation: 0"
• Wind: 3mphE 83°
• Humidity: 71%
• Pressure: 30"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 5 am

• 50°F
• Feels like:
  48°F

Clear

• Precip. probability: 3%
• Precipitation: 0"
• Wind: 4mphENE 60°
• Humidity: 71%
• Pressure: 30"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

• 6 am

• 50°F
• Feels like:
  48°F

Clear

• Precip. probability: 3%
• Precipitation: 0"
• Wind: 4mphENE 61°
• Humidity: 68%
• Pressure: 30"Hg
• Visibility: 10mi
• UV index: 0
• details ▼

For the rest of the night, the weather will be unstable. The temperature will vary between a maximum of 57.2°F and a minimum of 53.6°F.

Updated: Oct 24, 2026 @ 03:51:57 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

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