Viewing Station: CA-SN-174 : Petaluma 1.4 S
Nov 8, 2021 - Sep 16, 20261,647 Total Observations
View:

Climatology

Precipitation Normals Comparison

Month-To-Date: 0.19"
September 1-17, 2026(16 of 17 days covered by obs)
NOAA Normal
0.06"
Departure from Normal
0.13" : 305% of Normal
Year-To-Date: 13.71"
Jan 1 to Sep 17, 2026(254 of 260 days covered by obs)
NOAA Normal
19.05"
Departure from Normal
-5.34" : 72% of Normal
Water Year-To-Date: 22.43"
Oct 1, 2025 to Sep 17, 2026(344 of 352 days covered by obs)
NOAA Normal
29.88"
Departure from Normal
-7.45" : 75% 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