Viewing Station: ME-CM-18 : Portland 5.5 WNW
Aug 1, 2009 - Sep 17, 20266,331 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.87"
September 1-17, 2026(17 of 17 days covered by obs)
NOAA Normal
2.20"
Departure from Normal
-1.33" : 39% of Normal
Year-To-Date: 27.43"
Jan 1 to Sep 17, 2026(260 of 260 days covered by obs)
NOAA Normal
32.57"
Departure from Normal
-5.14" : 84% of Normal
Water Year-To-Date: 37.91"
Oct 1, 2025 to Sep 17, 2026(352 of 352 days covered by obs)
NOAA Normal
46.44"
Departure from Normal
-8.53" : 82% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.38
3.47
-0.09
Feb
3.43
3.59
-0.16
Mar
4.08
4.22
-0.14
Apr
4.37
4.55
-0.18
May
3.75
3.67
0.08
Jun
4.37
4.33
0.04
Jul
3.52
3.54
-0.02
Aug
3.47
3.51
-0.04
Sep
3.89
3.77
0.12
Oct
5.02
5.38
-0.36
Nov
4.36
4.21
0.15
Dec
4.49
4.71
-0.22
48.13
48.95
-0.82