Viewing Station: CA-NP-7 : St. Helena 1.1 S
Oct 14, 2009 - Dec 22, 2025867 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.26"
December 1-22, 2025(5 of 22 days covered by obs)
NOAA Normal
5.18"
Departure from Normal
-0.92" : 82% of Normal
Year-To-Date: 28.26"
Jan 1 to Dec 22, 2025(55 of 356 days covered by obs)
NOAA Normal
32.69"
Departure from Normal
-4.43" : 86% of Normal
Water Year-To-Date: 10.76"
Oct 1, 2025 to Dec 22, 2025(19 of 83 days covered by obs)
NOAA Normal
10.38"
Departure from Normal
0.38" : 104% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
7.00
6.71
0.29
Feb
6.69
6.72
-0.03
Mar
4.89
4.72
0.17
Apr
2.14
2.01
0.13
May
1.19
1.16
0.03
Jun
0.26
0.22
0.04
Jul
0.00
0.00
0.00
Aug
0.04
0.04
0.00
Sep
0.10
0.08
0.02
Oct
1.70
1.55
0.15
Nov
3.50
3.38
0.12
Dec
7.30
7.28
0.02
34.81
33.87
0.94