Viewing Station: OR-CC-143 : Lake Oswego 0.8 SSW
Aug 2, 2026 - Sep 22, 202652 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.33"
September 1-22, 2026(22 of 22 days covered by obs)
NOAA Normal
1.14"
Departure from Normal
0.19" : 116% of Normal
Year-To-Date: 1.35"
Jan 1 to Sep 22, 2026(52 of 265 days covered by obs)
NOAA Normal
24.70"
Departure from Normal
-23.35" : 5% of Normal
Water Year-To-Date: 1.35"
Oct 1, 2025 to Sep 22, 2026(52 of 357 days covered by obs)
NOAA Normal
41.97"
Departure from Normal
-40.62" : 3% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
5.97
6.30
-0.33
Feb
4.41
4.56
-0.15
Mar
4.58
4.86
-0.28
Apr
3.48
3.68
-0.20
May
2.52
2.52
0.00
Jun
1.60
1.67
-0.07
Jul
0.44
0.42
0.02
Aug
0.56
0.54
0.02
Sep
1.56
1.56
0.00
Oct
3.92
4.00
-0.08
Nov
6.36
6.59
-0.23
Dec
6.99
7.33
-0.34
42.39
44.03
-1.64