Viewing Station: MA-MD-228 : Groton 4.2 WNW
Apr 6, 2023 - Aug 9, 20261,137 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.87"
August 1-9, 2026(8 of 9 days covered by obs)
NOAA Normal
1.07"
Departure from Normal
3.80" : 453% of Normal
Year-To-Date: 27.19"
Jan 1 to Aug 9, 2026(200 of 221 days covered by obs)
NOAA Normal
27.59"
Departure from Normal
-0.40" : 99% of Normal
Water Year-To-Date: 36.42"
Oct 1, 2025 to Aug 9, 2026(285 of 313 days covered by obs)
NOAA Normal
40.60"
Departure from Normal
-4.18" : 90% 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