Viewing Station: MA-MD-251 : Chelmsford 2.8 SSW
Mar 31, 2025 - Jul 20, 2026410 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 3.06"
July 1-21, 2026(20 of 21 days covered by obs)
NOAA Normal
2.47"
Departure from Normal
0.59" : 124% of Normal
Year-To-Date: 16.65"
Jan 1 to Jul 21, 2026(199 of 202 days covered by obs)
NOAA Normal
25.03"
Departure from Normal
-8.38" : 67% of Normal
Water Year-To-Date: 25.56"
Oct 1, 2025 to Jul 21, 2026(289 of 294 days covered by obs)
NOAA Normal
37.77"
Departure from Normal
-12.21" : 68% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.36
3.57
-0.21
Feb
3.20
3.30
-0.10
Mar
4.15
4.32
-0.17
Apr
4.02
4.03
-0.01
May
3.70
3.63
0.07
Jun
4.13
4.13
0.00
Jul
3.64
3.71
-0.07
Aug
3.67
3.77
-0.10
Sep
3.80
3.78
0.02
Oct
4.67
4.78
-0.11
Nov
3.78
3.79
-0.01
Dec
4.29
4.53
-0.24
46.41
47.34
-0.93