Viewing Station: WA-KG-319 : Mercer Island 2.3 SSE
Dec 27, 2024 - Aug 20, 2026480 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.02"
August 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
0.63"
Departure from Normal
-0.61" : 3% of Normal
Year-To-Date: 19.27"
Jan 1 to Aug 20, 2026(231 of 232 days covered by obs)
NOAA Normal
20.66"
Departure from Normal
-1.39" : 93% of Normal
Water Year-To-Date: 38.28"
Oct 1, 2025 to Aug 20, 2026(323 of 324 days covered by obs)
NOAA Normal
35.29"
Departure from Normal
2.99" : 108% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
5.13
5.53
-0.40
Feb
3.54
3.89
-0.35
Mar
4.00
4.26
-0.26
Apr
3.10
3.19
-0.09
May
2.01
2.02
-0.01
Jun
1.56
1.63
-0.07
Jul
0.69
0.69
0.00
Aug
0.97
0.93
0.04
Sep
1.57
1.60
-0.03
Oct
3.70
3.94
-0.24
Nov
5.66
6.10
-0.44
Dec
5.27
5.85
-0.58
37.20
39.63
-2.43