Viewing Station: MA-SF-31 : Boston 6.5 SW
Sep 30, 2021 - May 11, 20261,636 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.95"
May 1-11, 2026(11 of 11 days covered by obs)
NOAA Normal
1.30"
Departure from Normal
-0.35" : 73% of Normal
Year-To-Date: 10.38"
Jan 1 to May 11, 2026(131 of 131 days covered by obs)
NOAA Normal
17.26"
Departure from Normal
-6.88" : 60% of Normal
Water Year-To-Date: 20.04"
Oct 1, 2025 to May 11, 2026(223 of 223 days covered by obs)
NOAA Normal
30.67"
Departure from Normal
-10.63" : 65% 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