10-day forecast

Today Clear 0% 68° 88° Today · UV 5 · Wind 12 mph · ☀ 7:18 AM – 6:31 PM
Sat 17 Clear 0% 63° 86° Saturday, October 17 · UV 5 · Wind 7 mph · ☀ 7:19 AM – 6:29 PM
Sun 18 Clear 0% 55° 70° Sunday, October 18 · UV 5 · Wind 11 mph · ☀ 7:20 AM – 6:28 PM
Mon 19 Partly cloudy 0% 54° 63° Monday, October 19 · UV 5 · Wind 11 mph · ☀ 7:21 AM – 6:27 PM
Tue 20 Cloudy 15% 53° 66° Tuesday, October 20 · UV 4 · Wind 7 mph · ☀ 7:22 AM – 6:25 PM
Wed 21 Mostly cloudy 0% 53° 71° Wednesday, October 21 · UV 3 · Wind 7 mph · ☀ 7:23 AM – 6:24 PM
Thu 22 Mostly cloudy 0% 54° 66° Thursday, October 22 · UV 3 · Wind 9 mph · ☀ 7:24 AM – 6:23 PM
Fri 23 Clear 0% 53° 67° Friday, October 23 · UV 4 · Wind 7 mph · ☀ 7:25 AM – 6:22 PM
Sat 24 Mostly clear 0% 52° 66° Saturday, October 24 · UV 4 · Wind 7 mph · ☀ 7:26 AM – 6:20 PM
Sun 25 Mostly cloudy 0% 53° 66° Sunday, October 25 · UV 3 · Wind 7 mph · ☀ 7:27 AM – 6:19 PM

14-day outlook & extended hourly ★ Premium

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About Castro Valley weather

Castro Valley is in Alameda County, California, United States at 37.69°, -122.09°. Right now it’s 79° and mostly clear; today’s high is 88° with a 0% chance of rain.

California encompasses an extraordinary range of climates, from the Mediterranean coast to alpine peaks, scorching deserts, and temperate rainforests. The state's Central Valley is one of the most productive agricultural regions in the world, benefiting from warm, dry summers and mild, wet winters. Death Valley holds the record for the highest reliably recorded air temperature on Earth at 134 degrees Fahrenheit.