Viewing Station: ME-CM-128 : South Portland 1.6 S
Jul 18, 2018 - Sep 17, 20262,966 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.16"
September 1-17, 2026(17 of 17 days covered by obs)
NOAA Normal
2.20"
Departure from Normal
-1.04" : 53% of Normal
Year-To-Date: 29.40"
Jan 1 to Sep 17, 2026(259 of 260 days covered by obs)
NOAA Normal
32.69"
Departure from Normal
-3.29" : 90% of Normal
Water Year-To-Date: 39.30"
Oct 1, 2025 to Sep 17, 2026(351 of 352 days covered by obs)
NOAA Normal
46.59"
Departure from Normal
-7.29" : 84% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.43
3.55
-0.12
Feb
3.50
3.62
-0.12
Mar
4.17
4.26
-0.09
Apr
4.42
4.56
-0.14
May
3.75
3.67
0.08
Jun
4.33
4.27
0.06
Jul
3.46
3.51
-0.05
Aug
3.43
3.51
-0.08
Sep
3.88
3.71
0.17
Oct
4.97
5.32
-0.35
Nov
4.37
4.29
0.08
Dec
4.56
4.75
-0.19
48.27
49.02
-0.75