Monthly Historical AveragesCastro Valley, CA
Average Temperature
High
24°
Feels 24
Low
12°
Feels 11
Average Precipitation
1 Days
5.4mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastTuesday, June 9, 2026
Day
22°Feels 22
Wind
22 km/h W
Gust
33 km/h
Humidity
53%
P.O.P
30%
Night
13°Feels 13
Wind
11 km/h S
Gust
17 km/h
Humidity
85%
P.O.P
0%
Historical AveragesJun 9
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity