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 2002

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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
December 2002
1-Month 		5.80"
(147.32mm)		 4.63"
(117.60mm)		 1.17"
(29.72mm)		 96th Driest
Driest since:
 1976
33rd Wettest
Wettest since:
 1964
Nov–Dec 2002
2-Month 		8.37"
(212.60mm)		 8.97"
(227.84mm)		 -0.60"
(-15.24mm)		 52nd Driest
Driest since:
 1976
77th Wettest
Wettest since:
 1996
Oct–Dec 2002
3-Month 		8.93"
(226.82mm)		 11.51"
(292.35mm)		 -2.58"
(-65.53mm)		 26th Driest
Driest since:
 1976
103rd Wettest
Wettest since:
 1996
Sep–Dec 2002
4-Month 		9.73"
(247.14mm)		 12.93"
(328.42mm)		 -3.20"
(-81.28mm)		 16th Driest
Driest since:
 1976
113th Wettest
Wettest since:
 1996
Aug–Dec 2002
5-Month 		10.08"
(256.03mm)		 13.73"
(348.74mm)		 -3.65"
(-92.71mm)		 15th Driest
Driest since:
 1936
114th Wettest
Wettest since:
 1996
Jul–Dec 2002
6-Month 		10.48"
(266.19mm)		 14.46"
(367.28mm)		 -3.98"
(-101.09mm)		 14th Driest
Driest since:
 1936
115th Wettest
Wettest since:
 1996
Jun–Dec 2002
7-Month 		11.87"
(301.50mm)		 16.18"
(410.97mm)		 -4.31"
(-109.47mm)		 11th Driest
Driest since:
 1976
118th Wettest
Wettest since:
 1996
May–Dec 2002
8-Month 		13.34"
(338.84mm)		 18.32"
(465.33mm)		 -4.98"
(-126.49mm)		 8th Driest
Driest since:
 1935
121st Wettest
Wettest since:
 1996
Apr–Dec 2002
9-Month 		15.83"
(402.08mm)		 20.67"
(525.02mm)		 -4.84"
(-122.94mm)		 11th Driest
Driest since:
 1976
118th Wettest
Wettest since:
 1996
Mar–Dec 2002
10-Month 		19.06"
(484.12mm)		 23.93"
(607.82mm)		 -4.87"
(-123.70mm)		 10th Driest
Driest since:
 1976
119th Wettest
Wettest since:
 1996
Feb–Dec 2002
11-Month 		21.55"
(547.37mm)		 27.54"
(699.52mm)		 -5.99"
(-152.15mm)		 9th Driest
Driest since:
 1935
120th Wettest
Wettest since:
 1996
Jan–Dec 2002
12-Month 		26.57"
(674.88mm)		 32.07"
(814.58mm)		 -5.50"
(-139.70mm)		 14th Driest
Driest since:
 1929
115th Wettest
Wettest since:
 1996
Jul 2001–Dec 2002
18-Month 		42.35"
(1,075.69mm)		 46.58"
(1,183.13mm)		 -4.23"
(-107.44mm)		 29th Driest
Driest since:
 1929
99th Wettest
Wettest since:
 1996
Jan 2001–Dec 2002
24-Month 		54.17"
(1,375.92mm)		 64.19"
(1,630.43mm)		 -10.02"
(-254.51mm)		 7th Driest
Driest since:
 1930
121st Wettest
Wettest since:
 1996
Jan 2000–Dec 2002
36-Month 		81.42"
(2,068.07mm)		 96.33"
(2,446.78mm)		 -14.91"
(-378.71mm)		 4th Driest
Driest since:
 1930
123rd Wettest
Wettest since:
 1997
Jan 1999–Dec 2002
48-Month 		114.82"
(2,916.43mm)		 128.33"
(3,259.58mm)		 -13.51"
(-343.15mm)		 7th Driest
Driest since:
 1931
119th Wettest
Wettest since:
 1998
Jan 1998–Dec 2002
60-Month 		154.58"
(3,926.33mm)		 160.34"
(4,072.64mm)		 -5.76"
(-146.31mm)		 33rd Driest
Driest since:
 1932
92nd Wettest
Wettest since:
 1999

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