Weather in Castro Valley, United States 🇺🇸
Castro Valley currently sits at 10°C, clear, feeling like 9°C. Relative humidity is 93%, with winds around 8 km/h, and the UV index is 0 (low). The next few days in Castro Valley look set for about 8°C up to 22°C.
Hourly Forecast for Castro Valley
14-Day Forecast for Castro Valley
Sunny
Overcast
Patchy rain nearby
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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 11:00 to 14:00, when it is around 18°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 10°C (49°F) right now, clear (feels like 9°C).
What's the weather like in Castro Valley right now?
Conditions in Castro Valley right now: Clear, humidity 93%, wind 8 km/h SW.
What is today's forecast for Castro Valley?
Today in Castro Valley: high 18°C, low 9°C, sunny. Chance of rain: 9%.
What is the 7-day weather forecast for Castro Valley?
Daily highs and lows for Castro Valley:
- 2026-10-19: 18°C / 9°C
- 2026-10-20: 22°C / 8°C
- 2026-10-21: 17°C / 11°C
- 2026-10-22: 19°C / 10°C
- 2026-10-23: 24°C / 9°C
- 2026-10-24: 27°C / 11°C
- 2026-10-25: 29°C / 13°C
Is it going to rain in Castro Valley today?
There is a 9% chance of rain in Castro Valley today.
What is the wind speed in Castro Valley right now?
Wind in Castro Valley is currently 8 km/h (5 mph) from the SW.
What is the UV index in Castro Valley right now?
The UV index in Castro Valley is currently 0 (low). Sun protection is recommended when the index is 3 or higher.
