Castro Valley

What is the climate like in Castro Valley?

The best time to visit Castro Valley is typically April – October, with trip comfort peaking in June (9.2/10). Castro Valley is warmest in August, when daily highs average 82°F (28°C), and coolest in December, when lows fall to about 43°F (6°C). The wettest month is typically January and the driest is July; the year sees roughly 19 in of precipitation.

• Best time to visitApril – October — comfort peaks in June (9.2/10)
• Warmest monthAugust — average high 82°F (28°C)
• Coolest monthDecember — average low 43°F (6°C)
• Wettest monthJanuary (4.1 in)
• Driest monthJuly (0.0 in)
• Annual precipitation19 in