Viewing Station: MA-MD-228 : Groton 4.2 WNW
Apr 6, 2023 - May 11, 20261,060 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.48"
May 1-11, 2026(11 of 11 days covered by obs)
NOAA Normal
1.30"
Departure from Normal
0.18" : 114% of Normal
Year-To-Date: 11.82"
Jan 1 to May 11, 2026(121 of 131 days covered by obs)
NOAA Normal
16.30"
Departure from Normal
-4.48" : 73% of Normal
Water Year-To-Date: 21.05"
Oct 1, 2025 to May 11, 2026(206 of 223 days covered by obs)
NOAA Normal
29.31"
Departure from Normal
-8.26" : 72% 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