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, October 1955

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
October 1955
1-Month
4.08"
(103.63mm)
2.54"
(64.52mm)
1.54"
(39.11mm)
119th Driest
Driest since:
1895
10th Wettest
Wettest since:
2016
Ties: 1997
Sep–Oct 1955
2-Month
5.55"
(140.97mm)
3.96"
(100.58mm)
1.59"
(40.39mm)
112th Driest
Driest since:
1987
17th Wettest
Wettest since:
2016
Aug–Oct 1955
3-Month
5.73"
(145.54mm)
4.76"
(120.90mm)
0.97"
(24.64mm)
97th Driest
Driest since:
1987
32nd Wettest
Wettest since:
2016
Jul–Oct 1955
4-Month
7.16"
(181.86mm)
5.49"
(139.45mm)
1.67"
(42.41mm)
110th Driest
Driest since:
1952
19th Wettest
Wettest since:
2016
Jun–Oct 1955
5-Month
8.54"
(216.92mm)
7.21"
(183.13mm)
1.33"
(33.79mm)
102nd Driest
Driest since:
1917, 2002
27th Wettest
Wettest since:
1947
May–Oct 1955
6-Month
10.16"
(258.06mm)
9.35"
(237.49mm)
0.81"
(20.57mm)
86th Driest
Driest since:
2002
43rd Wettest
Wettest since:
1941
Apr–Oct 1955
7-Month
13.90"
(353.06mm)
11.71"
(297.43mm)
2.19"
(55.63mm)
108th Driest
Driest since:
2002
21st Wettest
Wettest since:
1997
Mar–Oct 1955
8-Month
17.18"
(436.37mm)
14.97"
(380.24mm)
2.21"
(56.13mm)
105th Driest
Driest since:
1939
24th Wettest
Wettest since:
1997
Feb–Oct 1955
9-Month
19.82"
(503.43mm)
18.58"
(471.93mm)
1.24"
(31.50mm)
85th Driest
Driest since:
1929
44th Wettest
Wettest since:
2017
Jan–Oct 1955
10-Month
22.24"
(564.90mm)
23.10"
(586.74mm)
-0.86"
(-21.84mm)
44th Driest
Driest since:
1929
85th Wettest
Wettest since:
1950
Ties: 1918
Dec 1954–Oct 1955
11-Month
25.92"
(658.37mm)
27.75"
(704.85mm)
-1.83"
(-46.48mm)
39th Driest
Driest since:
1929
89th Wettest
Wettest since:
1997
Ties: 1930
Nov 1954–Oct 1955
12-Month
29.42"
(747.27mm)
32.10"
(815.34mm)
-2.68"
(-68.07mm)
33rd Driest
Driest since:
1977
95th Wettest
Wettest since:
1997
May 1954–Oct 1955
18-Month
38.30"
(972.82mm)
41.48"
(1,053.59mm)
-3.18"
(-80.77mm)
35th Driest
Driest since:
1929
93rd Wettest
Wettest since:
1997
Nov 1953–Oct 1955
24-Month
63.44"
(1,611.38mm)
64.23"
(1,631.44mm)
-0.79"
(-20.06mm)
60th Driest
Driest since:
1930
67th Wettest
Wettest since:
1997
Nov 1952–Oct 1955
36-Month
97.72"
(2,482.09mm)
96.31"
(2,446.27mm)
1.41"
(35.82mm)
74th Driest
Driest since:
1931
52nd Wettest
Wettest since:
1997
Nov 1951–Oct 1955
48-Month
125.43"
(3,185.92mm)
128.38"
(3,260.85mm)
-2.95"
(-74.93mm)
49th Driest
Driest since:
1931
76th Wettest
Wettest since:
1999
Nov 1950–Oct 1955
60-Month
160.60"
(4,079.24mm)
160.37"
(4,073.40mm)
0.23"
(5.84mm)
64th Driest
Driest since:
1932
60th Wettest
Wettest since:
1999

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