Viewing Station: MA-SF-31 : Boston 6.5 SW
Sep 30, 2021 - Aug 9, 20261,724 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.94"
August 1-9, 2026(9 of 9 days covered by obs)
NOAA Normal
1.04"
Departure from Normal
0.90" : 187% of Normal
Year-To-Date: 19.76"
Jan 1 to Aug 9, 2026(221 of 221 days covered by obs)
NOAA Normal
28.37"
Departure from Normal
-8.61" : 70% of Normal
Water Year-To-Date: 29.42"
Oct 1, 2025 to Aug 9, 2026(313 of 313 days covered by obs)
NOAA Normal
41.78"
Departure from Normal
-12.36" : 70% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.76
3.82
-0.06
Feb
3.44
3.43
0.01
Mar
4.59
4.66
-0.07
Apr
4.17
4.30
-0.13
May
3.65
3.61
0.04
Jun
4.17
4.06
0.11
Jul
3.55
3.54
0.01
Aug
3.58
3.65
-0.07
Sep
3.88
3.80
0.08
Oct
4.76
4.79
-0.03
Nov
3.94
3.96
-0.02
Dec
4.71
4.84
-0.13
48.20
48.46
-0.26