Viewing Station: IA-IA-21 : Williamsburg 0.6 SW
Mar 25, 2023 - Aug 18, 20261,198 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.83"
August 1-18, 2026(18 of 18 days covered by obs)
NOAA Normal
2.39"
Departure from Normal
2.44" : 202% of Normal
Year-To-Date: 30.88"
Jan 1 to Aug 18, 2026(225 of 230 days covered by obs)
NOAA Normal
24.58"
Departure from Normal
6.30" : 126% of Normal
Water Year-To-Date: 35.00"
Oct 1, 2025 to Aug 18, 2026(315 of 322 days covered by obs)
NOAA Normal
31.09"
Departure from Normal
3.91" : 113% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.09
1.13
-0.04
Feb
1.38
1.38
0.00
Mar
2.12
2.15
-0.03
Apr
3.73
3.58
0.15
May
4.66
4.82
-0.16
Jun
5.11
4.84
0.27
Jul
4.10
4.23
-0.13
Aug
4.11
4.26
-0.15
Sep
3.47
3.52
-0.05
Oct
2.93
2.78
0.15
Nov
2.08
2.09
-0.01
Dec
1.50
1.64
-0.14
36.28
36.42
-0.14