Viewing Station: MD-MG-74 : Rockville 0.6 SE
Apr 15, 2012 - Sep 18, 20264,560 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.20"
September 1-19, 2026(18 of 19 days covered by obs)
NOAA Normal
2.70"
Departure from Normal
-1.50" : 44% of Normal
Year-To-Date: 29.38"
Jan 1 to Sep 19, 2026(234 of 262 days covered by obs)
NOAA Normal
32.29"
Departure from Normal
-2.91" : 91% of Normal
Water Year-To-Date: 34.09"
Oct 1, 2025 to Sep 19, 2026(310 of 354 days covered by obs)
NOAA Normal
42.86"
Departure from Normal
-8.77" : 80% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.01
3.04
-0.03
Feb
2.64
2.68
-0.04
Mar
3.74
3.81
-0.07
Apr
3.44
3.39
0.05
May
4.30
4.37
-0.07
Jun
4.28
4.24
0.04
Jul
4.43
4.33
0.10
Aug
3.75
3.78
-0.03
Sep
4.26
4.38
-0.12
Oct
3.79
3.87
-0.08
Nov
3.15
3.21
-0.06
Dec
3.63
3.66
-0.03
44.42
44.76
-0.34