Viewing Station: CA-SN-174 : Petaluma 1.4 S
Nov 8, 2021 - Dec 16, 20251,408 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.00"
December 1-20, 2025(16 of 20 days covered by obs)
NOAA Normal
3.94"
Departure from Normal
-3.94" : 0% of Normal
Year-To-Date: 17.03"
Jan 1 to Dec 20, 2025(349 of 354 days covered by obs)
NOAA Normal
27.77"
Departure from Normal
-10.74" : 61% of Normal
Water Year-To-Date: 4.57"
Oct 1, 2025 to Dec 20, 2025(76 of 81 days covered by obs)
NOAA Normal
8.67"
Departure from Normal
-4.10" : 53% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
5.77
6.23
-0.46
Feb
5.84
6.29
-0.45
Mar
4.12
3.71
0.41
Apr
1.91
1.93
-0.02
May
1.06
1.00
0.06
Jun
0.24
0.27
-0.03
Jul
0.01
0.00
0.01
Aug
0.04
0.04
0.00
Sep
0.11
0.08
0.03
Oct
1.48
1.29
0.19
Nov
3.25
2.69
0.56
Dec
6.10
6.24
-0.14
29.93
29.77
0.16