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 1939

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 1939
1-Month
2.28"
(57.91mm)
2.54"
(64.52mm)
-0.26"
(-6.61mm)
56th Driest
Driest since:
1895
73rd Wettest
Wettest since:
2016
Sep–Oct 1939
2-Month
3.19"
(81.03mm)
3.96"
(100.58mm)
-0.77"
(-19.55mm)
40th Driest
Driest since:
1987
89th Wettest
Wettest since:
2016
Aug–Oct 1939
3-Month
3.56"
(90.42mm)
4.76"
(120.90mm)
-1.20"
(-30.48mm)
30th Driest
Driest since:
1987
99th Wettest
Wettest since:
2016
Jul–Oct 1939
4-Month
4.30"
(109.22mm)
5.49"
(139.45mm)
-1.19"
(-30.23mm)
27th Driest
Driest since:
1952
102nd Wettest
Wettest since:
2016
Ties: 2003
Jun–Oct 1939
5-Month
5.69"
(144.53mm)
7.21"
(183.13mm)
-1.52"
(-38.60mm)
27th Driest
Driest since:
1917, 2002
102nd Wettest
Wettest since:
1947
May–Oct 1939
6-Month
7.01"
(178.05mm)
9.35"
(237.49mm)
-2.34"
(-59.44mm)
16th Driest
Driest since:
2002
113th Wettest
Wettest since:
1941
Apr–Oct 1939
7-Month
7.80"
(198.12mm)
11.71"
(297.43mm)
-3.91"
(-99.31mm)
4th Driest
Driest since:
2002
125th Wettest
Wettest since:
1997
Mar–Oct 1939
8-Month
10.22"
(259.59mm)
14.97"
(380.24mm)
-4.75"
(-120.65mm)
1st Driest
Driest since:
1939
128th Wettest
Wettest since:
1997
Feb–Oct 1939
9-Month
14.03"
(356.36mm)
18.58"
(471.93mm)
-4.55"
(-115.57mm)
7th Driest
Driest since:
1929
122nd Wettest
Wettest since:
2017
Jan–Oct 1939
10-Month
17.77"
(451.36mm)
23.10"
(586.74mm)
-5.33"
(-135.38mm)
5th Driest
Driest since:
1929
124th Wettest
Wettest since:
1950
Dec 1938–Oct 1939
11-Month
20.96"
(532.38mm)
27.75"
(704.85mm)
-6.79"
(-172.47mm)
6th Driest
Driest since:
1929
122nd Wettest
Wettest since:
1997
Nov 1938–Oct 1939
12-Month
24.43"
(620.52mm)
32.10"
(815.34mm)
-7.67"
(-194.82mm)
7th Driest
Driest since:
1977
121st Wettest
Wettest since:
1997
May 1938–Oct 1939
18-Month
32.32"
(820.93mm)
41.48"
(1,053.59mm)
-9.16"
(-232.66mm)
6th Driest
Driest since:
1929
122nd Wettest
Wettest since:
1997
Nov 1937–Oct 1939
24-Month
60.91"
(1,547.11mm)
64.23"
(1,631.44mm)
-3.32"
(-84.33mm)
39th Driest
Driest since:
1930
88th Wettest
Wettest since:
1997
Nov 1936–Oct 1939
36-Month
90.11"
(2,288.79mm)
96.31"
(2,446.27mm)
-6.20"
(-157.48mm)
29th Driest
Driest since:
1931
97th Wettest
Wettest since:
1997
Nov 1935–Oct 1939
48-Month
118.40"
(3,007.36mm)
128.38"
(3,260.85mm)
-9.98"
(-253.49mm)
18th Driest
Driest since:
1931
107th Wettest
Wettest since:
1999
Nov 1934–Oct 1939
60-Month
147.14"
(3,737.36mm)
160.37"
(4,073.40mm)
-13.23"
(-336.04mm)
15th Driest
Driest since:
1932
109th Wettest
Wettest since:
1999

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