Viewing Station: CA-SF-21 : San Francisco 3.4 S
Aug 30, 2021 - Dec 22, 20251,204 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.08"
December 1-22, 2025(21 of 22 days covered by obs)
NOAA Normal
3.51"
Departure from Normal
-1.43" : 59% of Normal
Year-To-Date: 14.42"
Jan 1 to Dec 22, 2025(329 of 356 days covered by obs)
NOAA Normal
22.43"
Departure from Normal
-8.01" : 64% of Normal
Water Year-To-Date: 6.13"
Oct 1, 2025 to Dec 22, 2025(68 of 83 days covered by obs)
NOAA Normal
7.21"
Departure from Normal
-1.08" : 85% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
4.50
4.25
0.25
Feb
4.56
4.54
0.02
Mar
3.39
3.19
0.20
Apr
1.64
1.42
0.22
May
0.76
0.72
0.04
Jun
0.19
0.20
-0.01
Jul
0.01
0.02
-0.01
Aug
0.05
0.06
-0.01
Sep
0.12
0.10
0.02
Oct
1.09
0.94
0.15
Nov
2.61
2.31
0.30
Dec
4.94
4.96
-0.02
23.86
22.71
1.15