Viewing Station: shem003 : Rockville 2.2 NW
Jun 16, 2004 - Dec 7, 20257,769 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.01"
December 1-7, 2025(5 of 7 days covered by obs)
NOAA Normal
0.15"
Departure from Normal
-0.14" : 7% of Normal
Year-To-Date: 28.80"
Jan 1 to Dec 7, 2025(329 of 341 days covered by obs)
NOAA Normal
25.44"
Departure from Normal
3.36" : 113% of Normal
Water Year-To-Date: 1.04"
Oct 1, 2025 to Dec 7, 2025(60 of 68 days covered by obs)
NOAA Normal
3.15"
Departure from Normal
-2.11" : 33% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.52
0.50
0.02
Feb
0.65
0.64
0.01
Mar
1.37
1.49
-0.12
Apr
2.73
2.92
-0.19
May
4.12
4.13
-0.01
Jun
4.06
4.18
-0.12
Jul
3.41
3.35
0.06
Aug
3.24
3.17
0.07
Sep
2.19
2.12
0.07
Oct
2.01
2.03
-0.02
Nov
0.99
1.01
-0.02
Dec
0.66
0.75
-0.09
25.95
26.29
-0.34