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Castro Valley
Average rainfall
ClimateForecastNovemberDecember >>

Castro Valley (CA) Precipitation: Average Monthly Rainfall and Snowfall

This graph shows the average amount of rainfall per month in Castro Valley (California). The numbers are calculated over a 30-year period to provide a reliable average.

  • 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.

Current rainfall in Castro Valley (CA)

Sat   Nov 23
17°C | 9°C
SW 14 km/h
2.8 mm
partly cloudy and chance of rain

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

partly cloudy and rain

hourly forecast
Mon   Nov 25
16°C | 11°C
N 11 km/h
9.2 mm
overcast and heavy rain

overcast and heavy rain

hourly forecast
5-Day Forecast 10-Day Forecast

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