Weather in Castro Valley, United States 🇺🇸
Castro Valley currently sits at 19°C, partly cloudy, feeling like 19°C. Relative humidity is 73%, with winds around 7 km/h, and the UV index is 6 (high). The next few days in Castro Valley look set for about 14°C up to 31°C.
Hourly Forecast for Castro Valley
14-Day Forecast for Castro Valley
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Additional Forecasts for Castro Valley
Air Quality
Historical Weather
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Best Time to Be Outside in Castro Valley Today
The most comfortable window in Castro Valley today looks like 16:00 to 19:00, when it is around 22°C. It should stay dry through that window. No significant rain is expected in the next several hours.
Frequently Asked Questions about Weather in Castro Valley
What is the temperature in Castro Valley right now?
Castro Valley is sitting at 19°C (67°F) right now, partly cloudy (feels like 19°C).
What's the weather like in Castro Valley right now?
Conditions in Castro Valley right now: Partly Cloudy, humidity 73%, wind 7 km/h WSW.
What is today's forecast for Castro Valley?
Today in Castro Valley: high 24°C, low 14°C, overcast. Chance of rain: 16%.
What is the 7-day weather forecast for Castro Valley?
Daily highs and lows for Castro Valley:
- 2026-08-22: 24°C / 14°C
- 2026-08-23: 31°C / 14°C
- 2026-08-24: 30°C / 14°C
- 2026-08-25: 29°C / 13°C
- 2026-08-26: 30°C / 12°C
- 2026-08-27: 31°C / 13°C
- 2026-08-28: 31°C / 14°C
Is it going to rain in Castro Valley today?
There is a 16% chance of rain in Castro Valley today.
What is the wind speed in Castro Valley right now?
Wind in Castro Valley is currently 7 km/h (4 mph) from the WSW.
What is the UV index in Castro Valley right now?
The UV index in Castro Valley is currently 6.2 (high). Sun protection is recommended when the index is 3 or higher.
