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, December 1989

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
December 1989
1-Month
1.93"
(49.02mm)
4.63"
(117.60mm)
-2.70"
(-68.58mm)
5th Driest
Driest since:
1976
123rd Wettest
Wettest since:
1964
Nov–Dec 1989
2-Month
5.28"
(134.11mm)
8.97"
(227.84mm)
-3.69"
(-93.73mm)
10th Driest
Driest since:
1976
118th Wettest
Wettest since:
1996
Oct–Dec 1989
3-Month
7.57"
(192.28mm)
11.51"
(292.35mm)
-3.94"
(-100.07mm)
11th Driest
Driest since:
1976
117th Wettest
Wettest since:
1996
Sep–Dec 1989
4-Month
8.38"
(212.85mm)
12.93"
(328.42mm)
-4.55"
(-115.57mm)
8th Driest
Driest since:
1976
120th Wettest
Wettest since:
1996
Aug–Dec 1989
5-Month
9.95"
(252.73mm)
13.73"
(348.74mm)
-3.78"
(-96.01mm)
14th Driest
Driest since:
1936
114th Wettest
Wettest since:
1996
Jul–Dec 1989
6-Month
10.47"
(265.94mm)
14.46"
(367.28mm)
-3.99"
(-101.34mm)
13th Driest
Driest since:
1936
115th Wettest
Wettest since:
1996
Jun–Dec 1989
7-Month
11.42"
(290.07mm)
16.18"
(410.97mm)
-4.76"
(-120.90mm)
8th Driest
Driest since:
1976
120th Wettest
Wettest since:
1996
May–Dec 1989
8-Month
13.71"
(348.23mm)
18.32"
(465.33mm)
-4.61"
(-117.10mm)
11th Driest
Driest since:
1935
117th Wettest
Wettest since:
1996
Apr–Dec 1989
9-Month
15.78"
(400.81mm)
20.67"
(525.02mm)
-4.89"
(-124.21mm)
10th Driest
Driest since:
1976
118th Wettest
Wettest since:
1996
Mar–Dec 1989
10-Month
21.23"
(539.24mm)
23.93"
(607.82mm)
-2.70"
(-68.58mm)
34th Driest
Driest since:
1976
94th Wettest
Wettest since:
1996
Feb–Dec 1989
11-Month
23.41"
(594.61mm)
27.54"
(699.52mm)
-4.13"
(-104.91mm)
23rd Driest
Driest since:
1935
105th Wettest
Wettest since:
1996
Jan–Dec 1989
12-Month
27.54"
(699.52mm)
32.07"
(814.58mm)
-4.53"
(-115.06mm)
22nd Driest
Driest since:
1929
106th Wettest
Wettest since:
1996
Jul 1988–Dec 1989
18-Month
40.62"
(1,031.75mm)
46.58"
(1,183.13mm)
-5.96"
(-151.38mm)
18th Driest
Driest since:
1929
109th Wettest
Wettest since:
1996
Jan 1988–Dec 1989
24-Month
57.00"
(1,447.80mm)
64.19"
(1,630.43mm)
-7.19"
(-182.63mm)
16th Driest
Driest since:
1930
111th Wettest
Wettest since:
1996
Jan 1987–Dec 1989
36-Month
83.25"
(2,114.55mm)
96.33"
(2,446.78mm)
-13.08"
(-332.23mm)
6th Driest
Driest since:
1930
120th Wettest
Wettest since:
1997
Jan 1986–Dec 1989
48-Month
115.91"
(2,944.11mm)
128.33"
(3,259.58mm)
-12.42"
(-315.47mm)
12th Driest
Driest since:
1931
113th Wettest
Wettest since:
1998
Jan 1985–Dec 1989
60-Month
139.89"
(3,553.21mm)
160.34"
(4,072.64mm)
-20.45"
(-519.43mm)
4th Driest
Driest since:
1932
120th Wettest
Wettest since:
1999

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