Viewing Station: CA-SF-20 : San Francisco 3.1 W
Jan 18, 2021 - Dec 22, 20251,383 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.56"
December 1-22, 2025(20 of 22 days covered by obs)
NOAA Normal
3.91"
Departure from Normal
-1.35" : 65% of Normal
Year-To-Date: 17.04"
Jan 1 to Dec 22, 2025(281 of 356 days covered by obs)
NOAA Normal
24.69"
Departure from Normal
-7.65" : 69% of Normal
Water Year-To-Date: 6.73"
Oct 1, 2025 to Dec 22, 2025(68 of 83 days covered by obs)
NOAA Normal
7.99"
Departure from Normal
-1.26" : 84% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
4.97
4.63
0.34
Feb
5.02
4.96
0.06
Mar
3.69
3.45
0.24
Apr
1.80
1.51
0.29
May
0.82
0.79
0.03
Jun
0.21
0.21
0.00
Jul
0.01
0.02
-0.01
Aug
0.06
0.06
0.00
Sep
0.12
0.11
0.01
Oct
1.18
1.02
0.16
Nov
2.90
2.63
0.27
Dec
5.51
5.71
-0.20
26.29
25.10
1.19