Viewing Station: MA-WR-18 : Northborough 0.6 SSE
Jan 12, 2012 - May 18, 20262,828 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.62"
May 1-18, 2026(18 of 18 days covered by obs)
NOAA Normal
2.12"
Departure from Normal
0.50" : 124% of Normal
Year-To-Date: 12.51"
Jan 1 to May 18, 2026(129 of 138 days covered by obs)
NOAA Normal
17.66"
Departure from Normal
-5.15" : 71% of Normal
Water Year-To-Date: 21.17"
Oct 1, 2025 to May 18, 2026(221 of 230 days covered by obs)
NOAA Normal
30.89"
Departure from Normal
-9.72" : 69% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.57
3.57
0.00
Feb
3.35
3.27
0.08
Mar
4.36
4.25
0.11
Apr
4.26
4.15
0.11
May
3.65
3.53
0.12
Jun
4.21
4.14
0.07
Jul
3.75
3.67
0.08
Aug
3.90
3.93
-0.03
Sep
4.00
3.84
0.16
Oct
4.82
4.81
0.01
Nov
3.94
3.72
0.22
Dec
4.47
4.54
-0.07
48.28
47.42
0.86