Viewing Station: OR-CC-97 : Lake Oswego 2.1 SW
Dec 7, 2017 - Aug 22, 20263,145 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.00"
August 1-24, 2026(21 of 24 days covered by obs)
NOAA Normal
0.41"
Departure from Normal
-0.41" : 0% of Normal
Year-To-Date: 19.28"
Jan 1 to Aug 24, 2026(233 of 236 days covered by obs)
NOAA Normal
22.27"
Departure from Normal
-2.99" : 87% of Normal
Water Year-To-Date: 38.80"
Oct 1, 2025 to Aug 24, 2026(325 of 328 days covered by obs)
NOAA Normal
38.76"
Departure from Normal
0.04" : 100% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
5.69
6.14
-0.45
Feb
4.20
4.37
-0.17
Mar
4.36
4.56
-0.20
Apr
3.27
3.42
-0.15
May
2.40
2.38
0.02
Jun
1.52
1.61
-0.09
Jul
0.42
0.41
0.01
Aug
0.53
0.48
0.05
Sep
1.51
1.48
0.03
Oct
3.74
3.82
-0.08
Nov
6.03
6.40
-0.37
Dec
6.72
7.21
-0.49
40.39
42.28
-1.89