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 1981

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
October 1981
1-Month
3.43"
(87.12mm)
2.54"
(64.52mm)
0.89"
(22.60mm)
99th Driest
Driest since:
1895
30th Wettest
Wettest since:
2016
Sep–Oct 1981
2-Month
5.11"
(129.79mm)
3.96"
(100.58mm)
1.15"
(29.21mm)
105th Driest
Driest since:
1987
24th Wettest
Wettest since:
2016
Aug–Oct 1981
3-Month
5.36"
(136.14mm)
4.76"
(120.90mm)
0.60"
(15.24mm)
89th Driest
Driest since:
1987
40th Wettest
Wettest since:
2016
Jul–Oct 1981
4-Month
6.09"
(154.69mm)
5.49"
(139.45mm)
0.60"
(15.24mm)
86th Driest
Driest since:
1952
43rd Wettest
Wettest since:
2016
Jun–Oct 1981
5-Month
8.80"
(223.52mm)
7.21"
(183.13mm)
1.59"
(40.39mm)
106th Driest
Driest since:
1917, 2002
23rd Wettest
Wettest since:
1947
Ties: 1959
May–Oct 1981
6-Month
11.80"
(299.72mm)
9.35"
(237.49mm)
2.45"
(62.23mm)
115th Driest
Driest since:
2002
14th Wettest
Wettest since:
1941
Apr–Oct 1981
7-Month
14.67"
(372.62mm)
11.71"
(297.43mm)
2.96"
(75.19mm)
118th Driest
Driest since:
2002
11th Wettest
Wettest since:
1997
Mar–Oct 1981
8-Month
17.41"
(442.21mm)
14.97"
(380.24mm)
2.44"
(61.97mm)
109th Driest
Driest since:
1939
20th Wettest
Wettest since:
1997
Feb–Oct 1981
9-Month
21.28"
(540.51mm)
18.58"
(471.93mm)
2.70"
(68.58mm)
106th Driest
Driest since:
1929
23rd Wettest
Wettest since:
2017
Jan–Oct 1981
10-Month
23.21"
(589.53mm)
23.10"
(586.74mm)
0.11"
(2.79mm)
64th Driest
Driest since:
1929
65th Wettest
Wettest since:
1950
Dec 1980–Oct 1981
11-Month
29.23"
(742.44mm)
27.75"
(704.85mm)
1.48"
(37.59mm)
88th Driest
Driest since:
1929
40th Wettest
Wettest since:
1997
Nov 1980–Oct 1981
12-Month
33.69"
(855.73mm)
32.10"
(815.34mm)
1.59"
(40.39mm)
84th Driest
Driest since:
1977
44th Wettest
Wettest since:
1997
May 1980–Oct 1981
18-Month
43.68"
(1,109.47mm)
41.48"
(1,053.59mm)
2.20"
(55.88mm)
88th Driest
Driest since:
1929
40th Wettest
Wettest since:
1997
Nov 1979–Oct 1981
24-Month
65.48"
(1,663.19mm)
64.23"
(1,631.44mm)
1.25"
(31.75mm)
78th Driest
Driest since:
1930
49th Wettest
Wettest since:
1997
Nov 1978–Oct 1981
36-Month
93.76"
(2,381.50mm)
96.31"
(2,446.27mm)
-2.55"
(-64.77mm)
46th Driest
Driest since:
1931
80th Wettest
Wettest since:
1997
Nov 1977–Oct 1981
48-Month
129.55"
(3,290.57mm)
128.38"
(3,260.85mm)
1.17"
(29.72mm)
72nd Driest
Driest since:
1931
53rd Wettest
Wettest since:
1999
Nov 1976–Oct 1981
60-Month
150.81"
(3,830.57mm)
160.37"
(4,073.40mm)
-9.56"
(-242.83mm)
21st Driest
Driest since:
1932
103rd Wettest
Wettest since:
1999

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