Average Monthly Sunshine hours in Castro Valley (CA)

This graph shows the average number of hours per month that Castro Valley receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

• On average, May is the sunniest month with 324 hours of sunshine.
• December has on average the lowest amount of sunshine with 160 hours.
• On average, the total annual amount of sun is 3072 hours.

Forecast: is it sunny in Castro Valley (CA)?

Sat   Nov 23

17°C | 9°C

SW 14 km/h

2.8 mm

partly cloudy and chance of rain

hourly forecast

Sun   Nov 24

17°C | 9°C

S 14 km/h

5.6 mm

partly cloudy and rain

hourly forecast

Mon   Nov 25

16°C | 11°C

N 11 km/h

9.2 mm

overcast and heavy rain

hourly forecast

5-Day Forecast 10-Day Forecast