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 1930

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 1930
1-Month
2.77"
(70.36mm)
4.53"
(115.06mm)
-1.76"
(-44.70mm)
18th Driest
Driest since:
1985
111th Wettest
Wettest since:
1953
Dec 1929–Jan 1930
2-Month
9.20"
(233.68mm)
9.17"
(232.92mm)
0.03"
(0.76mm)
67th Driest
Driest since:
1977
61st Wettest
Wettest since:
1965
Nov 1929–Jan 1930
3-Month
9.66"
(245.36mm)
13.53"
(343.66mm)
-3.87"
(-98.30mm)
15th Driest
Driest since:
1977
113th Wettest
Wettest since:
1974
Oct 1929–Jan 1930
4-Month
10.78"
(273.81mm)
16.08"
(408.43mm)
-5.30"
(-134.62mm)
9th Driest
Driest since:
1977
119th Wettest
Wettest since:
1997
Sep 1929–Jan 1930
5-Month
11.25"
(285.75mm)
17.50"
(444.50mm)
-6.25"
(-158.75mm)
6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1974
Aug 1929–Jan 1930
6-Month
11.60"
(294.64mm)
18.31"
(465.07mm)
-6.71"
(-170.43mm)
6th Driest
Driest since:
1977
122nd Wettest
Wettest since:
1974
Jul 1929–Jan 1930
7-Month
11.74"
(298.20mm)
19.04"
(483.62mm)
-7.30"
(-185.42mm)
3rd Driest
Driest since:
1977
125th Wettest
Wettest since:
1956
Ties: 2001
Jun 1929–Jan 1930
8-Month
13.90"
(353.06mm)
20.76"
(527.30mm)
-6.86"
(-174.24mm)
5th Driest
Driest since:
1977
123rd Wettest
Wettest since:
1956
May 1929–Jan 1930
9-Month
14.94"
(379.48mm)
22.91"
(581.91mm)
-7.97"
(-202.43mm)
2nd Driest
Driest since:
1977
126th Wettest
Wettest since:
1997
Apr 1929–Jan 1930
10-Month
17.80"
(452.12mm)
25.27"
(641.86mm)
-7.47"
(-189.74mm)
4th Driest
Driest since:
1977
124th Wettest
Wettest since:
1997
Mar 1929–Jan 1930
11-Month
20.42"
(518.67mm)
28.53"
(724.66mm)
-8.11"
(-205.99mm)
5th Driest
Driest since:
1977
123rd Wettest
Wettest since:
1997
Feb 1929–Jan 1930
12-Month
21.75"
(552.45mm)
32.13"
(816.10mm)
-10.38"
(-263.65mm)
2nd Driest
Driest since:
1977
126th Wettest
Wettest since:
1997
Aug 1928–Jan 1930
18-Month
34.85"
(885.19mm)
50.47"
(1,281.94mm)
-15.62"
(-396.75mm)
1st Driest
Driest since:
1930
126th Wettest
Wettest since:
1997
Feb 1928–Jan 1930
24-Month
46.64"
(1,184.66mm)
64.28"
(1,632.71mm)
-17.64"
(-448.05mm)
2nd Driest
Driest since:
1931
125th Wettest
Wettest since:
1997
Feb 1927–Jan 1930
36-Month
82.62"
(2,098.55mm)
96.31"
(2,446.27mm)
-13.69"
(-347.72mm)
5th Driest
Driest since:
1931
121st Wettest
Wettest since:
1998
Feb 1926–Jan 1930
48-Month
114.55"
(2,909.57mm)
128.35"
(3,260.09mm)
-13.80"
(-350.52mm)
6th Driest
Driest since:
1932
119th Wettest
Wettest since:
1999
Feb 1925–Jan 1930
60-Month
142.02"
(3,607.31mm)
160.30"
(4,071.62mm)
-18.28"
(-464.31mm)
5th Driest
Driest since:
1933
119th Wettest
Wettest since:
2000

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