Viewing Station: OR-CC-97 : Lake Oswego 2.1 SW
Dec 7, 2017 - Sep 25, 20263,180 Total Observations
View:

Climatology

Precipitation Normals Comparison

Month-To-Date: 1.59"
September 1-26, 2026(25 of 26 days covered by obs)
NOAA Normal
1.31"
Departure from Normal
0.28" : 121% of Normal
Year-To-Date: 20.91"
Jan 1 to Sep 26, 2026(268 of 269 days covered by obs)
NOAA Normal
23.70"
Departure from Normal
-2.79" : 88% of Normal
Water Year-To-Date: 40.43"
Oct 1, 2025 to Sep 26, 2026(360 of 361 days covered by obs)
NOAA Normal
40.19"
Departure from Normal
0.24" : 101% 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