Viewing Station: OR-CC-97 : Lake Oswego 2.1 SW
Dec 7, 2017 - Aug 25, 20252,777 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.50"
August 1-31, 2025(23 of 31 days covered by obs)
NOAA Normal
0.53"
Departure from Normal
-0.03" : 94% of Normal
Year-To-Date: 20.54"
Jan 1 to Aug 31, 2025(230 of 243 days covered by obs)
NOAA Normal
22.39"
Departure from Normal
-1.85" : 92% of Normal
Water Year-To-Date: 40.17"
Oct 1, 2024 to Aug 31, 2025(322 of 335 days covered by obs)
NOAA Normal
38.88"
Departure from Normal
1.29" : 103% 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