Viewing Station: MA-MD-228 : Groton 4.2 WNW
Apr 6, 2023 - Sep 8, 20261,166 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.06"
September 1-8, 2026(8 of 8 days covered by obs)
NOAA Normal
1.07"
Departure from Normal
-0.01" : 99% of Normal
Year-To-Date: 28.76"
Jan 1 to Sep 8, 2026(229 of 251 days covered by obs)
NOAA Normal
31.29"
Departure from Normal
-2.53" : 92% of Normal
Water Year-To-Date: 37.99"
Oct 1, 2025 to Sep 8, 2026(314 of 343 days covered by obs)
NOAA Normal
44.30"
Departure from Normal
-6.31" : 86% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.39
3.39
0.00
Feb
3.28
3.25
0.03
Mar
4.13
4.16
-0.03
Apr
4.20
3.96
0.24
May
3.66
3.47
0.19
Jun
4.19
4.09
0.10
Jul
3.67
3.65
0.02
Aug
3.70
3.68
0.02
Sep
4.02
3.77
0.25
Oct
4.83
4.73
0.10
Nov
3.84
3.65
0.19
Dec
4.34
4.45
-0.11
47.25
46.25
1.00