Viewing Station: VA-FX-1 : Herndon 3.3 S
Nov 8, 2005 - May 20, 20266,615 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.05"
May 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
2.75"
Departure from Normal
-1.70" : 38% of Normal
Year-To-Date: 12.17"
Jan 1 to May 20, 2026(141 of 140 days covered by obs)
NOAA Normal
15.15"
Departure from Normal
-2.98" : 80% of Normal
Water Year-To-Date: 16.92"
Oct 1, 2025 to May 20, 2026(233 of 232 days covered by obs)
NOAA Normal
25.33"
Departure from Normal
-8.41" : 67% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.98
3.07
-0.09
Feb
2.55
2.65
-0.10
Mar
3.54
3.80
-0.26
Apr
3.33
3.39
-0.06
May
4.27
4.52
-0.25
Jun
4.17
4.38
-0.21
Jul
4.22
4.33
-0.11
Aug
3.49
3.66
-0.17
Sep
4.06
4.30
-0.24
Oct
3.69
3.81
-0.12
Nov
3.06
3.20
-0.14
Dec
3.43
3.53
-0.10
42.79
44.64
-1.85