Viewing Station: OR-MT-155 : Portland 3.8 SE
Apr 18, 2023 - Sep 18, 20261,194 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.01"
September 1-20, 2026(18 of 20 days covered by obs)
NOAA Normal
1.05"
Departure from Normal
-0.04" : 96% of Normal
Year-To-Date: 20.22"
Jan 1 to Sep 20, 2026(261 of 263 days covered by obs)
NOAA Normal
24.53"
Departure from Normal
-4.31" : 82% of Normal
Water Year-To-Date: 41.09"
Oct 1, 2025 to Sep 20, 2026(353 of 355 days covered by obs)
NOAA Normal
41.43"
Departure from Normal
-0.34" : 99% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
5.88
6.31
-0.43
Feb
4.29
4.54
-0.25
Mar
4.51
4.91
-0.40
Apr
3.43
3.73
-0.30
May
2.60
2.69
-0.09
Jun
1.72
1.75
-0.03
Jul
0.47
0.47
0.00
Aug
0.58
0.58
0.00
Sep
1.58
1.56
0.02
Oct
3.85
3.97
-0.12
Nov
6.25
6.44
-0.19
Dec
6.80
7.22
-0.42
41.96
44.17
-2.21