Viewing Station: CA-AL-43 : Castro Valley 1.7 WNW
Oct 2, 2018 - May 10, 2025248 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.02"
May 1-11, 2025(9 of 11 days covered by obs)
NOAA Normal
0.26"
Departure from Normal
-0.24" : 8% of Normal
Year-To-Date: 8.20"
Jan 1 to May 11, 2025(128 of 131 days covered by obs)
NOAA Normal
12.42"
Departure from Normal
-4.22" : 66% of Normal
Water Year-To-Date: 13.34"
Oct 1, 2024 to May 11, 2025(156 of 223 days covered by obs)
NOAA Normal
19.39"
Departure from Normal
-6.05" : 69% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.86
4.42
-0.56
Feb
3.79
4.31
-0.52
Mar
3.00
3.53
-0.53
Apr
1.51
1.80
-0.29
May
0.72
0.83
-0.11
Jun
0.15
0.24
-0.09
Jul
0.01
0.01
0.00
Aug
0.03
0.05
-0.02
Sep
0.11
0.12
-0.01
Oct
0.93
1.11
-0.18
Nov
2.09
2.36
-0.27
Dec
3.95
4.43
-0.48
20.15
23.21
-3.06