Viewing Station: WA-LN-2 : Grand Coulee 3.2 ESE
Jun 16, 2008 - Sep 17, 20256,005 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.52"
September 1-17, 2025(17 of 17 days covered by obs)
NOAA Normal
0.20"
Departure from Normal
0.32" : 262% of Normal
Year-To-Date: 4.54"
Jan 1 to Sep 17, 2025(261 of 260 days covered by obs)
NOAA Normal
6.75"
Departure from Normal
-2.21" : 67% of Normal
Water Year-To-Date: 10.42"
Oct 1, 2024 to Sep 17, 2025(353 of 352 days covered by obs)
NOAA Normal
10.07"
Departure from Normal
0.35" : 103% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.08
1.27
-0.19
Feb
0.76
0.88
-0.12
Mar
0.98
1.00
-0.02
Apr
0.87
0.93
-0.06
May
1.10
1.03
0.07
Jun
0.96
0.96
0.00
Jul
0.51
0.48
0.03
Aug
0.29
0.31
-0.02
Sep
0.35
0.34
0.01
Oct
0.81
0.79
0.02
Nov
1.10
1.20
-0.10
Dec
1.41
1.47
-0.06
10.22
10.66
-0.44