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, December 2006

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
December 2006
1-Month		4.91"
(124.71mm)		4.63"
(117.60mm)		0.28"
(7.11mm)		72nd Driest
Driest since:
1976
57th Wettest
Wettest since:
1964
Nov–Dec 2006
2-Month		13.20"
(335.28mm)		8.97"
(227.84mm)		4.23"
(107.44mm)		120th Driest
Driest since:
1976
9th Wettest
Wettest since:
1996
Oct–Dec 2006
3-Month		14.64"
(371.86mm)		11.51"
(292.35mm)		3.13"
(79.51mm)		109th Driest
Driest since:
1976
20th Wettest
Wettest since:
1996
Sep–Dec 2006
4-Month		15.66"
(397.76mm)		12.93"
(328.42mm)		2.73"
(69.34mm)		102nd Driest
Driest since:
1976
27th Wettest
Wettest since:
1996
Aug–Dec 2006
5-Month		15.92"
(404.37mm)		13.73"
(348.74mm)		2.19"
(55.63mm)		94th Driest
Driest since:
1936
35th Wettest
Wettest since:
1996
Jul–Dec 2006
6-Month		16.27"
(413.26mm)		14.46"
(367.28mm)		1.81"
(45.98mm)		92nd Driest
Driest since:
1936
37th Wettest
Wettest since:
1996
Jun–Dec 2006
7-Month		18.08"
(459.23mm)		16.18"
(410.97mm)		1.90"
(48.26mm)		93rd Driest
Driest since:
1976
36th Wettest
Wettest since:
1996
May–Dec 2006
8-Month		20.06"
(509.52mm)		18.32"
(465.33mm)		1.74"
(44.19mm)		90th Driest
Driest since:
1935
39th Wettest
Wettest since:
1996
Ties: 1970
Apr–Dec 2006
9-Month		22.94"
(582.68mm)		20.67"
(525.02mm)		2.27"
(57.66mm)		96th Driest
Driest since:
1976
33rd Wettest
Wettest since:
1996
Mar–Dec 2006
10-Month		26.28"
(667.51mm)		23.93"
(607.82mm)		2.35"
(59.69mm)		94th Driest
Driest since:
1976
35th Wettest
Wettest since:
1996
Feb–Dec 2006
11-Month		28.78"
(731.01mm)		27.54"
(699.52mm)		1.24"
(31.49mm)		76th Driest
Driest since:
1935
53rd Wettest
Wettest since:
1996
Jan–Dec 2006
12-Month		36.81"
(934.97mm)		32.07"
(814.58mm)		4.74"
(120.39mm)		111th Driest
Driest since:
1929
18th Wettest
Wettest since:
1996
Jul 2005–Dec 2006
18-Month		52.43"
(1,331.72mm)		46.58"
(1,183.13mm)		5.85"
(148.59mm)		109th Driest
Driest since:
1929
19th Wettest
Wettest since:
1996
Jan 2005–Dec 2006
24-Month		68.61"
(1,742.69mm)		64.19"
(1,630.43mm)		4.42"
(112.26mm)		104th Driest
Driest since:
1930
24th Wettest
Wettest since:
1996
Jan 2004–Dec 2006
36-Month		98.26"
(2,495.80mm)		96.33"
(2,446.78mm)		1.93"
(49.02mm)		81st Driest
Driest since:
1930
46th Wettest
Wettest since:
1997
Jan 2003–Dec 2006
48-Month		130.21"
(3,307.33mm)		128.33"
(3,259.58mm)		1.88"
(47.75mm)		83rd Driest
Driest since:
1931
43rd Wettest
Wettest since:
1998
Jan 2002–Dec 2006
60-Month		156.78"
(3,982.21mm)		160.34"
(4,072.64mm)		-3.56"
(-90.43mm)		47th Driest
Driest since:
1932
78th Wettest
Wettest since:
1999

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