Viewing Station: OR-MT-89 : Portland 9.8 ESE
Dec 4, 2015 - Sep 20, 20263,525 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.38"
September 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
1.21"
Departure from Normal
0.17" : 114% of Normal
Year-To-Date: 22.56"
Jan 1 to Sep 20, 2026(262 of 263 days covered by obs)
NOAA Normal
28.69"
Departure from Normal
-6.13" : 79% of Normal
Water Year-To-Date: 45.60"
Oct 1, 2025 to Sep 20, 2026(354 of 355 days covered by obs)
NOAA Normal
48.22"
Departure from Normal
-2.62" : 95% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
6.72
7.06
-0.34
Feb
5.03
5.14
-0.11
Mar
5.33
5.56
-0.23
Apr
4.11
4.28
-0.17
May
3.01
3.14
-0.13
Jun
2.10
2.19
-0.09
Jul
0.52
0.54
-0.02
Aug
0.66
0.68
-0.02
Sep
1.81
1.88
-0.07
Oct
4.52
4.65
-0.13
Nov
7.30
7.14
0.16
Dec
7.71
7.82
-0.11
48.82
50.08
-1.26