Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. 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 1957

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2023)
Wettest/Driest
Since
Record
January 1957
1-Month
2.69"
(68.33mm)
4.53"
(115.06mm)
-1.84"
(-46.73mm)
10th Driest
Driest since:
1985
120th Wettest
Wettest since:
1953
Ties: 1979, 2005
Dec 1956–Jan 1957
2-Month
6.87"
(174.50mm)
9.17"
(232.92mm)
-2.30"
(-58.42mm)
23rd Driest
Driest since:
1977
106th Wettest
Wettest since:
1965
Nov 1956–Jan 1957
3-Month
8.24"
(209.30mm)
13.53"
(343.66mm)
-5.29"
(-134.36mm)
8th Driest
Driest since:
1977
121st Wettest
Wettest since:
1974
Oct 1956–Jan 1957
4-Month
13.28"
(337.31mm)
16.08"
(408.43mm)
-2.80"
(-71.12mm)
23rd Driest
Driest since:
1977
106th Wettest
Wettest since:
1997
Sep 1956–Jan 1957
5-Month
14.26"
(362.20mm)
17.50"
(444.50mm)
-3.24"
(-82.30mm)
22nd Driest
Driest since:
1977
107th Wettest
Wettest since:
1974
Aug 1956–Jan 1957
6-Month
15.24"
(387.10mm)
18.31"
(465.07mm)
-3.07"
(-77.97mm)
25th Driest
Driest since:
1977
104th Wettest
Wettest since:
1974
Jul 1956–Jan 1957
7-Month
15.90"
(403.86mm)
19.04"
(483.62mm)
-3.14"
(-79.76mm)
26th Driest
Driest since:
1977
103rd Wettest
Wettest since:
1956
Jun 1956–Jan 1957
8-Month
17.82"
(452.63mm)
20.76"
(527.30mm)
-2.94"
(-74.67mm)
32nd Driest
Driest since:
1977
97th Wettest
Wettest since:
1956
May 1956–Jan 1957
9-Month
20.34"
(516.64mm)
22.91"
(581.91mm)
-2.57"
(-65.27mm)
32nd Driest
Driest since:
1977
97th Wettest
Wettest since:
1997
Apr 1956–Jan 1957
10-Month
21.34"
(542.04mm)
25.27"
(641.86mm)
-3.93"
(-99.82mm)
22nd Driest
Driest since:
1977
107th Wettest
Wettest since:
1997
Mar 1956–Jan 1957
11-Month
24.81"
(630.17mm)
28.53"
(724.66mm)
-3.72"
(-94.49mm)
25th Driest
Driest since:
1977
104th Wettest
Wettest since:
1997
Ties: 1966
Feb 1956–Jan 1957
12-Month
28.44"
(722.38mm)
32.13"
(816.10mm)
-3.69"
(-93.72mm)
29th Driest
Driest since:
1977
100th Wettest
Wettest since:
1997
Aug 1955–Jan 1957
18-Month
55.41"
(1,407.41mm)
50.47"
(1,281.94mm)
4.94"
(125.47mm)
107th Driest
Driest since:
1930
21st Wettest
Wettest since:
1997
Ties: 1969
Feb 1955–Jan 1957
24-Month
69.50"
(1,765.30mm)
64.28"
(1,632.71mm)
5.22"
(132.59mm)
106th Driest
Driest since:
1931
22nd Wettest
Wettest since:
1997
Feb 1954–Jan 1957
36-Month
96.16"
(2,442.46mm)
96.31"
(2,446.27mm)
-0.15"
(-3.81mm)
66th Driest
Driest since:
1931
61st Wettest
Wettest since:
1998
Feb 1953–Jan 1957
48-Month
131.74"
(3,346.20mm)
128.35"
(3,260.09mm)
3.39"
(86.11mm)
89th Driest
Driest since:
1932
37th Wettest
Wettest since:
1999
Feb 1952–Jan 1957
60-Month
161.05"
(4,090.67mm)
160.30"
(4,071.62mm)
0.75"
(19.05mm)
68th Driest
Driest since:
1933
57th Wettest
Wettest since:
2000

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