Viewing Station: WA-TH-40 : Olympia 8.5 WSW
May 10, 2015 - Sep 17, 20253,661 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.16"
September 1-17, 2025(17 of 17 days covered by obs)
NOAA Normal
1.33"
Departure from Normal
-1.17" : 12% of Normal
Year-To-Date: 32.75"
Jan 1 to Sep 17, 2025(260 of 260 days covered by obs)
NOAA Normal
34.83"
Departure from Normal
-2.08" : 94% of Normal
Water Year-To-Date: 68.11"
Oct 1, 2024 to Sep 17, 2025(352 of 352 days covered by obs)
NOAA Normal
60.43"
Departure from Normal
7.68" : 113% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
9.36
10.94
-1.58
Feb
6.12
7.55
-1.43
Mar
6.97
8.09
-1.12
Apr
4.63
5.14
-0.51
May
2.74
3.04
-0.30
Jun
1.87
2.02
-0.15
Jul
0.70
0.81
-0.11
Aug
1.11
1.28
-0.17
Sep
2.35
2.72
-0.37
Oct
6.02
7.00
-0.98
Nov
9.91
12.03
-2.12
Dec
9.67
10.87
-1.20
61.45
71.49
-10.04