Viewing Station: CA-SF-21 : San Francisco 3.4 S
Aug 30, 2021 - Sep 17, 20251,125 Total Observations
View:

Climatology

Precipitation Normals Comparison

Month-To-Date: 0.12"
September 1-17, 2025(17 of 17 days covered by obs)
NOAA Normal
0.07"
Departure from Normal
0.05" : 176% of Normal
Year-To-Date: 8.27"
Jan 1 to Sep 17, 2025(250 of 260 days covered by obs)
NOAA Normal
15.17"
Departure from Normal
-6.90" : 55% of Normal
Water Year-To-Date: 19.89"
Oct 1, 2024 to Sep 17, 2025(333 of 352 days covered by obs)
NOAA Normal
23.81"
Departure from Normal
-3.92" : 84% 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