Viewing Station: CA-SF-17 : San Francisco 1.6 SE
Oct 9, 1998 - Sep 22, 20262,205 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.02"
September 1-23, 2026(22 of 23 days covered by obs)
NOAA Normal
0.08"
Departure from Normal
-0.06" : 26% of Normal
Year-To-Date: 12.73"
Jan 1 to Sep 23, 2026(265 of 266 days covered by obs)
NOAA Normal
15.15"
Departure from Normal
-2.42" : 84% of Normal
Water Year-To-Date: 21.54"
Oct 1, 2025 to Sep 23, 2026(357 of 358 days covered by obs)
NOAA Normal
23.80"
Departure from Normal
-2.26" : 91% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
4.53
3.97
0.56
Feb
4.56
4.33
0.23
Mar
3.39
2.99
0.40
Apr
1.61
1.24
0.37
May
0.74
0.70
0.04
Jun
0.18
0.20
-0.02
Jul
0.01
0.02
-0.01
Aug
0.05
0.05
0.00
Sep
0.10
0.10
0.00
Oct
1.07
0.89
0.18
Nov
2.62
2.35
0.27
Dec
4.96
5.07
-0.11
23.82
21.91
1.91