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, January 1931

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
January 1931
1-Month
3.63"
(92.20mm)
4.53"
(115.06mm)
-0.90"
(-22.86mm)
45th Driest
Driest since:
1985
84th Wettest
Wettest since:
1953
Ties: 1941
Dec 1930–Jan 1931
2-Month
5.30"
(134.62mm)
9.17"
(232.92mm)
-3.87"
(-98.30mm)
8th Driest
Driest since:
1977
120th Wettest
Wettest since:
1965
Nov 1930–Jan 1931
3-Month
7.87"
(199.90mm)
13.53"
(343.66mm)
-5.66"
(-143.76mm)
6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1974
Oct 1930–Jan 1931
4-Month
10.06"
(255.52mm)
16.08"
(408.43mm)
-6.02"
(-152.91mm)
7th Driest
Driest since:
1977
121st Wettest
Wettest since:
1997
Sep 1930–Jan 1931
5-Month
11.67"
(296.42mm)
17.50"
(444.50mm)
-5.83"
(-148.08mm)
7th Driest
Driest since:
1977
121st Wettest
Wettest since:
1974
Aug 1930–Jan 1931
6-Month
12.39"
(314.71mm)
18.31"
(465.07mm)
-5.92"
(-150.36mm)
7th Driest
Driest since:
1977
121st Wettest
Wettest since:
1974
Jul 1930–Jan 1931
7-Month
12.60"
(320.04mm)
19.04"
(483.62mm)
-6.44"
(-163.58mm)
6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1956
Jun 1930–Jan 1931
8-Month
13.67"
(347.22mm)
20.76"
(527.30mm)
-7.09"
(-180.08mm)
4th Driest
Driest since:
1977
124th Wettest
Wettest since:
1956
May 1930–Jan 1931
9-Month
16.00"
(406.40mm)
22.91"
(581.91mm)
-6.91"
(-175.51mm)
7th Driest
Driest since:
1977
121st Wettest
Wettest since:
1997
Apr 1930–Jan 1931
10-Month
18.25"
(463.55mm)
25.27"
(641.86mm)
-7.02"
(-178.31mm)
5th Driest
Driest since:
1977
123rd Wettest
Wettest since:
1997
Mar 1930–Jan 1931
11-Month
20.31"
(515.87mm)
28.53"
(724.66mm)
-8.22"
(-208.79mm)
4th Driest
Driest since:
1977
124th Wettest
Wettest since:
1997
Feb 1930–Jan 1931
12-Month
24.59"
(624.59mm)
32.13"
(816.10mm)
-7.54"
(-191.51mm)
6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1997
Aug 1929–Jan 1931
18-Month
36.19"
(919.23mm)
50.47"
(1,281.94mm)
-14.28"
(-362.71mm)
2nd Driest
Driest since:
1930
125th Wettest
Wettest since:
1997
Feb 1929–Jan 1931
24-Month
46.34"
(1,177.04mm)
64.28"
(1,632.71mm)
-17.94"
(-455.67mm)
1st Driest
Driest since:
1931
126th Wettest
Wettest since:
1997
Feb 1928–Jan 1931
36-Month
71.23"
(1,809.24mm)
96.31"
(2,446.27mm)
-25.08"
(-637.03mm)
1st Driest
Driest since:
1931
125th Wettest
Wettest since:
1998
Feb 1927–Jan 1931
48-Month
107.21"
(2,723.13mm)
128.35"
(3,260.09mm)
-21.14"
(-536.96mm)
2nd Driest
Driest since:
1932
123rd Wettest
Wettest since:
1999
Feb 1926–Jan 1931
60-Month
139.14"
(3,534.16mm)
160.30"
(4,071.62mm)
-21.16"
(-537.46mm)
3rd Driest
Driest since:
1933
121st Wettest
Wettest since:
2000

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