Viewing Station: VA-HV-11 : Rockville 5.1 W
Apr 13, 2020 - Aug 20, 20251,923 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.96"
August 1-20, 2025(18 of 20 days covered by obs)
NOAA Normal
2.64"
Departure from Normal
-0.68" : 74% of Normal
Year-To-Date: 36.28"
Jan 1 to Aug 20, 2025(225 of 232 days covered by obs)
NOAA Normal
28.62"
Departure from Normal
7.66" : 127% of Normal
Water Year-To-Date: 41.11"
Oct 1, 2024 to Aug 20, 2025(317 of 324 days covered by obs)
NOAA Normal
39.31"
Departure from Normal
1.80" : 105% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.30
3.24
0.06
Feb
2.80
2.75
0.05
Mar
3.82
3.69
0.13
Apr
3.40
3.35
0.05
May
4.11
4.13
-0.02
Jun
4.23
4.01
0.22
Jul
4.32
4.07
0.25
Aug
4.09
4.20
-0.11
Sep
4.45
4.30
0.15
Oct
3.76
3.60
0.16
Nov
3.39
3.21
0.18
Dec
3.54
3.53
0.01
45.21
44.08
1.13