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 1990

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
January 1990
1-Month
6.06"
(153.92mm)
4.53"
(115.06mm)
1.53"
(38.86mm)
105th Driest
Driest since:
1985
24th Wettest
Wettest since:
1953
Dec 1989–Jan 1990
2-Month
7.99"
(202.95mm)
9.17"
(232.92mm)
-1.18"
(-29.97mm)
47th Driest
Driest since:
1977
81st Wettest
Wettest since:
1965
Nov 1989–Jan 1990
3-Month
11.34"
(288.04mm)
13.53"
(343.66mm)
-2.19"
(-55.62mm)
37th Driest
Driest since:
1977
91st Wettest
Wettest since:
1974
Oct 1989–Jan 1990
4-Month
13.63"
(346.20mm)
16.08"
(408.43mm)
-2.45"
(-62.23mm)
28th Driest
Driest since:
1977
100th Wettest
Wettest since:
1997
Sep 1989–Jan 1990
5-Month
14.44"
(366.78mm)
17.50"
(444.50mm)
-3.06"
(-77.72mm)
24th Driest
Driest since:
1977
104th Wettest
Wettest since:
1974
Aug 1989–Jan 1990
6-Month
16.01"
(406.65mm)
18.31"
(465.07mm)
-2.30"
(-58.42mm)
32nd Driest
Driest since:
1977
96th Wettest
Wettest since:
1974
Jul 1989–Jan 1990
7-Month
16.53"
(419.86mm)
19.04"
(483.62mm)
-2.51"
(-63.76mm)
32nd Driest
Driest since:
1977
96th Wettest
Wettest since:
1956
Jun 1989–Jan 1990
8-Month
17.48"
(443.99mm)
20.76"
(527.30mm)
-3.28"
(-83.31mm)
28th Driest
Driest since:
1977
100th Wettest
Wettest since:
1956
May 1989–Jan 1990
9-Month
19.77"
(502.16mm)
22.91"
(581.91mm)
-3.14"
(-79.75mm)
26th Driest
Driest since:
1977
102nd Wettest
Wettest since:
1997
Apr 1989–Jan 1990
10-Month
21.84"
(554.74mm)
25.27"
(641.86mm)
-3.43"
(-87.12mm)
26th Driest
Driest since:
1977
102nd Wettest
Wettest since:
1997
Mar 1989–Jan 1990
11-Month
27.29"
(693.17mm)
28.53"
(724.66mm)
-1.24"
(-31.49mm)
49th Driest
Driest since:
1977
79th Wettest
Wettest since:
1997
Feb 1989–Jan 1990
12-Month
29.47"
(748.54mm)
32.13"
(816.10mm)
-2.66"
(-67.56mm)
41st Driest
Driest since:
1977
87th Wettest
Wettest since:
1997
Aug 1988–Jan 1990
18-Month
46.28"
(1,175.51mm)
50.47"
(1,281.94mm)
-4.19"
(-106.43mm)
30th Driest
Driest since:
1930
97th Wettest
Wettest since:
1997
Feb 1988–Jan 1990
24-Month
59.10"
(1,501.14mm)
64.28"
(1,632.71mm)
-5.18"
(-131.57mm)
28th Driest
Driest since:
1931
99th Wettest
Wettest since:
1997
Feb 1987–Jan 1990
36-Month
85.34"
(2,167.64mm)
96.31"
(2,446.27mm)
-10.97"
(-278.63mm)
8th Driest
Driest since:
1931
118th Wettest
Wettest since:
1998
Feb 1986–Jan 1990
48-Month
117.24"
(2,977.90mm)
128.35"
(3,260.09mm)
-11.11"
(-282.19mm)
16th Driest
Driest since:
1932
109th Wettest
Wettest since:
1999
Feb 1985–Jan 1990
60-Month
145.33"
(3,691.38mm)
160.30"
(4,071.62mm)
-14.97"
(-380.24mm)
8th Driest
Driest since:
1933
116th Wettest
Wettest since:
2000

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