Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Northwest Climate Region

Precipitation Rankings, May 1928

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
May 1928
1-Month
0.68"
(17.27mm)
2.14"
(54.36mm)
-1.46"
(-37.09mm)
3rd Driest
Driest since:
1924
126th Wettest
Wettest since:
1998
Apr–May 1928
2-Month
3.51"
(89.15mm)
4.50"
(114.30mm)
-0.99"
(-25.15mm)
24th Driest
Driest since:
1924
105th Wettest
Wettest since:
1996
Mar–May 1928
3-Month
8.80"
(223.52mm)
7.76"
(197.10mm)
1.04"
(26.42mm)
92nd Driest
Driest since:
1924
37th Wettest
Wettest since:
2011
Feb–May 1928
4-Month
10.02"
(254.51mm)
11.37"
(288.80mm)
-1.35"
(-34.29mm)
42nd Driest
Driest since:
1924
87th Wettest
Wettest since:
1904
Ties: 1994
Jan–May 1928
5-Month
14.06"
(357.12mm)
15.90"
(403.86mm)
-1.84"
(-46.74mm)
34th Driest
Driest since:
1924
95th Wettest
Wettest since:
1904
Dec 1927–May 1928
6-Month
17.11"
(434.59mm)
20.54"
(521.72mm)
-3.43"
(-87.13mm)
21st Driest
Driest since:
1977
107th Wettest
Wettest since:
1997
Nov 1927–May 1928
7-Month
24.41"
(620.01mm)
24.89"
(632.21mm)
-0.48"
(-12.20mm)
59th Driest
Driest since:
1977
69th Wettest
Wettest since:
1974
Oct 1927–May 1928
8-Month
27.40"
(695.96mm)
27.45"
(697.23mm)
-0.05"
(-1.27mm)
65th Driest
Driest since:
1977
63rd Wettest
Wettest since:
1974
Ties: 1989
Sep 1927–May 1928
9-Month
30.72"
(780.29mm)
28.87"
(733.30mm)
1.85"
(46.99mm)
90th Driest
Driest since:
1977
38th Wettest
Wettest since:
1974
Aug 1927–May 1928
10-Month
31.59"
(802.39mm)
29.68"
(753.87mm)
1.91"
(48.52mm)
89th Driest
Driest since:
1977
39th Wettest
Wettest since:
1974
Jul 1927–May 1928
11-Month
31.86"
(809.24mm)
30.40"
(772.16mm)
1.46"
(37.08mm)
86th Driest
Driest since:
1977
42nd Wettest
Wettest since:
1974
Jun 1927–May 1928
12-Month
33.31"
(846.07mm)
32.13"
(816.10mm)
1.18"
(29.97mm)
86th Driest
Driest since:
1977
42nd Wettest
Wettest since:
1996
Dec 1926–May 1928
18-Month
54.56"
(1,385.82mm)
52.65"
(1,337.31mm)
1.91"
(48.51mm)
89th Driest
Driest since:
1930
38th Wettest
Wettest since:
1997
Jun 1926–May 1928
24-Month
68.25"
(1,733.55mm)
64.28"
(1,632.71mm)
3.97"
(100.84mm)
99th Driest
Driest since:
1930
28th Wettest
Wettest since:
1997
Jun 1925–May 1928
36-Month
94.07"
(2,389.38mm)
96.36"
(2,447.54mm)
-2.29"
(-58.16mm)
49th Driest
Driest since:
1931
77th Wettest
Wettest since:
1998
Jun 1924–May 1928
48-Month
127.59"
(3,240.79mm)
128.40"
(3,261.36mm)
-0.81"
(-20.57mm)
63rd Driest
Driest since:
1931
62nd Wettest
Wettest since:
1999
Jun 1923–May 1928
60-Month
152.70"
(3,878.58mm)
160.37"
(4,073.40mm)
-7.67"
(-194.82mm)
29th Driest
Driest since:
1933
95th Wettest
Wettest since:
1999

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