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 1933

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 1933
1-Month
2.81"
(71.37mm)
2.14"
(54.36mm)
0.67"
(17.01mm)
99th Driest
Driest since:
1924
30th Wettest
Wettest since:
1998
Ties: 1905
Apr–May 1933
2-Month
4.00"
(101.60mm)
4.50"
(114.30mm)
-0.50"
(-12.70mm)
44th Driest
Driest since:
1924
85th Wettest
Wettest since:
1996
Ties: 1969
Mar–May 1933
3-Month
7.40"
(187.96mm)
7.76"
(197.10mm)
-0.36"
(-9.14mm)
56th Driest
Driest since:
1924
73rd Wettest
Wettest since:
2011
Feb–May 1933
4-Month
10.58"
(268.73mm)
11.37"
(288.80mm)
-0.79"
(-20.07mm)
48th Driest
Driest since:
1924
81st Wettest
Wettest since:
1904
Jan–May 1933
5-Month
15.95"
(405.13mm)
15.90"
(403.86mm)
0.05"
(1.27mm)
64th Driest
Driest since:
1924
65th Wettest
Wettest since:
1904
Dec 1932–May 1933
6-Month
20.39"
(517.91mm)
20.54"
(521.72mm)
-0.15"
(-3.81mm)
59th Driest
Driest since:
1977
69th Wettest
Wettest since:
1997
Nov 1932–May 1933
7-Month
25.96"
(659.38mm)
24.89"
(632.21mm)
1.07"
(27.17mm)
82nd Driest
Driest since:
1977
46th Wettest
Wettest since:
1974
Oct 1932–May 1933
8-Month
28.32"
(719.33mm)
27.45"
(697.23mm)
0.87"
(22.10mm)
79th Driest
Driest since:
1977
49th Wettest
Wettest since:
1974
Sep 1932–May 1933
9-Month
28.59"
(726.19mm)
28.87"
(733.30mm)
-0.28"
(-7.11mm)
60th Driest
Driest since:
1977
68th Wettest
Wettest since:
1974
Aug 1932–May 1933
10-Month
29.19"
(741.43mm)
29.68"
(753.87mm)
-0.49"
(-12.44mm)
60th Driest
Driest since:
1977
68th Wettest
Wettest since:
1974
Jul 1932–May 1933
11-Month
30.18"
(766.57mm)
30.40"
(772.16mm)
-0.22"
(-5.59mm)
66th Driest
Driest since:
1977
62nd Wettest
Wettest since:
1974
Jun 1932–May 1933
12-Month
31.14"
(790.96mm)
32.13"
(816.10mm)
-0.99"
(-25.14mm)
53rd Driest
Driest since:
1977
75th Wettest
Wettest since:
1996
Dec 1931–May 1933
18-Month
54.45"
(1,383.03mm)
52.65"
(1,337.31mm)
1.80"
(45.72mm)
86th Driest
Driest since:
1930
41st Wettest
Wettest since:
1997
Jun 1931–May 1933
24-Month
65.34"
(1,659.64mm)
64.28"
(1,632.71mm)
1.06"
(26.93mm)
78th Driest
Driest since:
1930
49th Wettest
Wettest since:
1997
Jun 1930–May 1933
36-Month
88.40"
(2,245.36mm)
96.36"
(2,447.54mm)
-7.96"
(-202.18mm)
23rd Driest
Driest since:
1931
103rd Wettest
Wettest since:
1998
Jun 1929–May 1933
48-Month
113.22"
(2,875.79mm)
128.40"
(3,261.36mm)
-15.18"
(-385.57mm)
4th Driest
Driest since:
1931
121st Wettest
Wettest since:
1999
Jun 1928–May 1933
60-Month
135.94"
(3,452.88mm)
160.37"
(4,073.40mm)
-24.43"
(-620.52mm)
1st Driest
Driest since:
1933
123rd Wettest
Wettest since:
1999

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