Castro Valley (CA)
Today
Today weather in Castro Valley
Saturday, June 20th, 2026
23°
Partly cloudy
Official weather alert: Beach Hazards Statement. Castro Valley will experience a pleasantly warm today, reaching temperatures of up to 22 °F and cooling to about 14 °F in the evening. It'll be quite breezy in Castro Valley Today with average wind speeds of 19 km/h. There's a slight chance of rain at 12%.
23° / 14°
Temp
12%
Rain
19 km/h
Wind
76%
Humidity
Castro Valley Weather Pages
Castro Valley hourly forecast for today
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| 12:00 AM | 01:00 AM | 02:00 AM | 03:00 AM | 04:00 AM | 05:00 AM | 05:46 AM | 06:00 AM | 07:00 AM | 08:00 AM | 09:00 AM | 10:00 AM | 11:00 AM | 12:00 PM | 01:00 PM | 02:00 PM | 03:00 PM | 04:00 PM | 05:00 PM | 06:00 PM | 07:00 PM | 08:00 PM | 08:33 PM | 09:00 PM | 10:00 PM | 11:00 PM | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  |  | | |  | |  |  | | | |  | |  | | | | | | | | |  | |  | | Next |
| temperatures | 15.4° | 15° | 14.7° | 15.3° | 15.4° | 15.3° | Sunrise | 15.3° | 15.6° | 16° | 17° | 18.1° | 19.1° | 20° | 21.1° | 21.8° | 22.2° | 22° | 20.6° | 19.4° | 17.8° | 16.3° | Sunset | 15.3° | 14.7° | 14.3° | |
| wind speed | 8 km/h | 7 km/h | 4 km/h | 2 km/h | 1 km/h | 2 km/h | 2 km/h | 2 km/h | 4 km/h | 5 km/h | 7 km/h | 9 km/h | 12 km/h | 16 km/h | 19 km/h | 18 km/h | 18 km/h | 18 km/h | 18 km/h | 16 km/h | 12 km/h | 9 km/h | 8 km/h | 7 km/h | |||
| wind degree | 250° | 258° | 244° | 247° | 220° | 187° | 206° | 212° | 243° | 242° | 253° | 266° | 269° | 272° | 275° | 276° | 276° | 277° | 277° | 274° | 271° | 261° | 257° | 254° | |||
| wind direction | WSW | WSW | WSW | WSW | SW | S | SSW | SSW | WSW | WSW | WSW | W | W | W | W | W | W | W | W | W | W | W | WSW | WSW | |||
| Precipitation | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | |||
| chance for rain | 14% | 16% | 19% | 16% | 22% | 24% | 26% | 25% | 24% | 22% | 13% | 8% | 5% | 5% | 4% | 4% | 4% | 4% | 6% | 8% | 7% | 13% | 25% | 30% | |||
| chance for snow | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |||
| humidity | 87% | 89% | 91% | 92% | 75% | 81% | 85% | 83% | 81% | 79% | 70% | 66% | 63% | 61% | 60% | 60% | 60% | 55% | 64% | 74% | 74% | 88% | 91% | 91% | |||
| dew point | 13° | 13.2° | 13.2° | 13.1° | 11.5° | 12.2° | 12.6° | 12.5° | 12.6° | 12.8° | 12.3° | 12.6° | 13° | 13.2° | 14.1° | 14.4° | 14.3° | 14° | 13.8° | 12.7° | 11.6° | 13° | 12.8° | 12.8° | |||
| visibility | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 16 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | |||
| cloud cover | 22% | 30% | 45% | 31% | 100% | 100% | 100% | 100% | 100% | 100% | 75% | 44% | 24% | 20% | 14% | 11% | 10% | 0% | 9% | 13% | 6% | 15% | 80% | 100% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.3 | 1.2 | 2.8 | 5.1 | 7.4 | 9.2 | 10 | 9.4 | 7.8 | 5.6 | 3.3 | 1.6 | 0.5 | 0 | 0 | 0 | 0 |
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Weather in Castro Valley today
temperatures
23 °F
rain
0 mm
wind
19 km/h
UV
Very High
Castro Valley daylight overview ☀️
Today in Castro Valley, The sun rises at 05:46 and sets at 20:33, giving a total daylight duration of 14 hours and 47 minutes.
Quick links
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What to wear today in Castro Valley? clothing recommendations
Stay comfortably stylish - your tailored guide for today's Castro Valley forecast.
Long-sleeve shirt
Long pant
Closed-toe shoes
Light jacket
The weather today in Castro Valley - FAQ
What is the maximum temperature for today in Castro Valley?
The maximum temperature for today in Castro Valley is expected to be 23° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain today in Castro Valley? 🌧️
Yes, there is a 12% chance of rain in Castro Valley today. We recommend carrying an umbrella or rain gear to stay dry.
What will be the wind speed today in Castro Valley? 🌀
The wind in Castro Valley is expected to blow at 19 km/h. This could affect outdoor activities, so plan accordingly.
How should I dress for the weather in Castro Valley today?
Given the forecast of 23 °F with a 12% chance of rain, we advise checking our "What to wear today" section for recommendations. There, you will find tailored advice to help you stay comfortable and prepared for the weather conditions in Castro Valley today.
What is the sunrise and sunset time for Castro Valley today?
The sun is expected to rise at 05:46 and set at 20:33 in Castro Valley.
How accurate is the weather forecast Castro Valley today? ✅
Castro Valley weather forecast for today is based on the most current and sophisticated meteorological models available. While we strive for accuracy, weather conditions can change unexpectedly, so we recommend checking for updates regularly.
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Where is Castro Valley?Get accurate weather forecasts for Castro Valley, located at latitude 37.694 and longitude -122.086. Stay updated with localized weather information tailored for Castro Valley.
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