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 1929

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 1929
1-Month
1.04"
(26.42mm)
2.14"
(54.36mm)
-1.10"
(-27.94mm)
8th Driest
Driest since:
1924
121st Wettest
Wettest since:
1998
Apr–May 1929
2-Month
3.90"
(99.06mm)
4.50"
(114.30mm)
-0.60"
(-15.24mm)
39th Driest
Driest since:
1924
90th Wettest
Wettest since:
1996
Mar–May 1929
3-Month
6.52"
(165.61mm)
7.76"
(197.10mm)
-1.24"
(-31.49mm)
28th Driest
Driest since:
1924
101st Wettest
Wettest since:
2011
Feb–May 1929
4-Month
7.85"
(199.39mm)
11.37"
(288.80mm)
-3.52"
(-89.41mm)
6th Driest
Driest since:
1924
123rd Wettest
Wettest since:
1904
Jan–May 1929
5-Month
11.23"
(285.24mm)
15.90"
(403.86mm)
-4.67"
(-118.62mm)
7th Driest
Driest since:
1924
122nd Wettest
Wettest since:
1904
Dec 1928–May 1929
6-Month
14.92"
(378.97mm)
20.54"
(521.72mm)
-5.62"
(-142.75mm)
8th Driest
Driest since:
1977
120th Wettest
Wettest since:
1997
Nov 1928–May 1929
7-Month
17.83"
(452.88mm)
24.89"
(632.21mm)
-7.06"
(-179.33mm)
6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1974
Oct 1928–May 1929
8-Month
20.05"
(509.27mm)
27.45"
(697.23mm)
-7.40"
(-187.96mm)
7th Driest
Driest since:
1977
121st Wettest
Wettest since:
1974
Sep 1928–May 1929
9-Month
20.73"
(526.54mm)
28.87"
(733.30mm)
-8.14"
(-206.76mm)
6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1974
Aug 1928–May 1929
10-Month
20.95"
(532.13mm)
29.68"
(753.87mm)
-8.73"
(-221.74mm)
3rd Driest
Driest since:
1977
125th Wettest
Wettest since:
1974
Jul 1928–May 1929
11-Month
21.51"
(546.35mm)
30.40"
(772.16mm)
-8.89"
(-225.81mm)
3rd Driest
Driest since:
1977
125th Wettest
Wettest since:
1974
Jun 1928–May 1929
12-Month
22.72"
(577.09mm)
32.13"
(816.10mm)
-9.41"
(-239.01mm)
3rd Driest
Driest since:
1977
125th Wettest
Wettest since:
1996
Dec 1927–May 1929
18-Month
39.83"
(1,011.68mm)
52.65"
(1,337.31mm)
-12.82"
(-325.63mm)
2nd Driest
Driest since:
1930
125th Wettest
Wettest since:
1997
Jun 1927–May 1929
24-Month
56.03"
(1,423.16mm)
64.28"
(1,632.71mm)
-8.25"
(-209.55mm)
11th Driest
Driest since:
1930
116th Wettest
Wettest since:
1997
Jun 1926–May 1929
36-Month
90.97"
(2,310.64mm)
96.36"
(2,447.54mm)
-5.39"
(-136.90mm)
34th Driest
Driest since:
1931
92nd Wettest
Wettest since:
1998
Jun 1925–May 1929
48-Month
116.79"
(2,966.47mm)
128.40"
(3,261.36mm)
-11.61"
(-294.89mm)
14th Driest
Driest since:
1931
111th Wettest
Wettest since:
1999
Jun 1924–May 1929
60-Month
150.31"
(3,817.87mm)
160.37"
(4,073.40mm)
-10.06"
(-255.53mm)
22nd Driest
Driest since:
1933
102nd Wettest
Wettest since:
1999

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