Viewing Station: OR-CC-100 : Lake Oswego 1.4 NNE
Nov 16, 2018 - Sep 21, 20262,834 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.33"
September 1-22, 2026(21 of 22 days covered by obs)
NOAA Normal
1.16"
Departure from Normal
0.17" : 115% of Normal
Year-To-Date: 21.51"
Jan 1 to Sep 22, 2026(264 of 265 days covered by obs)
NOAA Normal
25.35"
Departure from Normal
-3.84" : 85% of Normal
Water Year-To-Date: 43.46"
Oct 1, 2025 to Sep 22, 2026(356 of 357 days covered by obs)
NOAA Normal
43.23"
Departure from Normal
0.23" : 101% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
6.23
6.34
-0.11
Feb
4.56
4.64
-0.08
Mar
4.67
5.00
-0.33
Apr
3.54
3.75
-0.21
May
2.56
2.59
-0.03
Jun
1.63
1.69
-0.06
Jul
0.43
0.42
0.01
Aug
0.57
0.56
0.01
Sep
1.58
1.59
-0.01
Oct
4.01
4.05
-0.04
Nov
6.59
6.61
-0.02
Dec
7.28
7.37
-0.09
43.65
44.61
-0.96