Help shape the future of Weather Underground. Join our Discord! You are currently viewing the new Weather Underground website. To go back to the old site, .

Home

My Profile

Favorites

until 10:00 PM PDT

Elev undefined ft, undefined °undefined undefined °undefined

Castro Valley, CA

undefined Station77°

Summary

Temperature (°F)	Max	Average	Min
Max Temperature	85	76.13	67
Avg Temperature	75	64.04	60.47
Min Temperature	75	58.25	53

Precipitation (in)	Max	Average	Min	Sum
Precipitation	0	0	0	0

Dew Point (°F)	Max	Average	Min
Dew Point	59	54.13	51.44

Wind (mph)	Max	Average	Min
Wind	18	13.38	3
Gust Wind	29	22.09	17

Sea Level Pressure (in)	Max	Average	Min
Sea Level Pressure	29.88	29.82	29.72

Daily Observations

Date	Temp High/Low	Dew Pt High/Low	Humidity	Wind	Max Wind	Wind Gust	Pressure	Precip.	Condition
9/26/2026	72 °F / 53 °F	54 °F / 49 °F	75 %		16 mph	-	29.87 in	0 in
9/27/2026	64 °F / 58 °F	54 °F / 51 °F	77 %		17 mph	-	29.86 in	0 in
9/28/2026	71 °F / 57 °F	55 °F / 50 °F	72 %		18 mph	-	29.86 in	0 in
9/29/2026	80 °F / 53 °F	56 °F / 49 °F	68 %		14 mph	-	29.74 in	0 in
9/30/2026	85 °F / 57 °F	58 °F / 48 °F	64 %		12 mph	-	29.74 in	0 in
10/1/2026	79 °F / 54 °F	58 °F / 52 °F	82 %		13 mph	-	29.81 in	0 in
10/2/2026	80 °F / 57 °F	60 °F / 55 °F	83 %		9 mph	-	29.84 in	0 in