Average monthly snow and rainfall in Castro Valley (CA)
The mean monthly precipitation over the year in Castro Valley (California), including rain, snow, hail.
- Most rainfall (rainy season) is seen in December.
- Castro Valley has dry periods in May, June, July, August and September.
- On average, December is the wettest month with 111 mm of precipitation.
- On average, August is the driest month with 0 mm of precipitation.
- The average amount of annual precipitation is 512 mm.
Forecast for Castro Valley (CA)
Sun May 05
16°C | 7°C
W 
25 km/h
25 km/h
clear and no rain
Mon May 06
18°C | 9°C
W 22 km/h
22 km/h
almost clear and no rain
Tue May 07
20°C | 10°C
W 22 km/h
22 km/h
almost clear and no rain
