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 1904

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
December 1904
1-Month 		4.90"
(124.46mm)		 4.63"
(117.60mm)		 0.27"
(6.86mm)		 71st Driest
Driest since:
 1976
58th Wettest
Wettest since:
 1964
Nov–Dec 1904
2-Month 		8.29"
(210.57mm)		 8.97"
(227.84mm)		 -0.68"
(-17.27mm)		 51st Driest
Driest since:
 1976
78th Wettest
Wettest since:
 1996
Oct–Dec 1904
3-Month 		10.59"
(268.99mm)		 11.51"
(292.35mm)		 -0.92"
(-23.36mm)		 49th Driest
Driest since:
 1976
80th Wettest
Wettest since:
 1996
Ties: 1956
Sep–Dec 1904
4-Month 		11.23"
(285.24mm)		 12.93"
(328.42mm)		 -1.70"
(-43.18mm)		 37th Driest
Driest since:
 1976
92nd Wettest
Wettest since:
 1996
Aug–Dec 1904
5-Month 		11.66"
(296.16mm)		 13.73"
(348.74mm)		 -2.07"
(-52.58mm)		 33rd Driest
Driest since:
 1936
96th Wettest
Wettest since:
 1996
Jul–Dec 1904
6-Month 		12.87"
(326.90mm)		 14.46"
(367.28mm)		 -1.59"
(-40.38mm)		 43rd Driest
Driest since:
 1936
86th Wettest
Wettest since:
 1996
Jun–Dec 1904
7-Month 		14.04"
(356.62mm)		 16.18"
(410.97mm)		 -2.14"
(-54.35mm)		 36th Driest
Driest since:
 1976
93rd Wettest
Wettest since:
 1996
May–Dec 1904
8-Month 		14.94"
(379.48mm)		 18.32"
(465.33mm)		 -3.38"
(-85.85mm)		 20th Driest
Driest to Date
 1935
109th Wettest
Wettest since:
 1996
Apr–Dec 1904
9-Month 		17.50"
(444.50mm)		 20.67"
(525.02mm)		 -3.17"
(-80.52mm)		 21st Driest
Driest since:
 1976
108th Wettest
Wettest since:
 1996
Mar–Dec 1904
10-Month 		24.86"
(631.44mm)		 23.93"
(607.82mm)		 0.93"
(23.62mm)		 74th Driest
Driest since:
 1976
55th Wettest
Wettest since:
 1996
Feb–Dec 1904
11-Month 		32.44"
(823.98mm)		 27.54"
(699.52mm)		 4.90"
(124.46mm)		 110th Driest
Driest since:
 1935
19th Wettest
Wettest since:
 1996
Jan–Dec 1904
12-Month 		36.21"
(919.73mm)		 32.07"
(814.58mm)		 4.14"
(105.15mm)		 105th Driest
Driest since:
 1929
24th Wettest
Wettest since:
 1996
Jul 1903–Dec 1904
18-Month 		51.67"
(1,312.42mm)		 46.58"
(1,183.13mm)		 5.09"
(129.29mm)		 104th Driest
Driest since:
 1929
24th Wettest
Wettest since:
 1996
Jan 1903–Dec 1904
24-Month 		68.00"
(1,727.20mm)		 64.19"
(1,630.43mm)		 3.81"
(96.77mm)		 100th Driest
Driest since:
 1930
28th Wettest
Wettest since:
 1996
Jan 1902–Dec 1904
36-Month 		104.14"
(2,645.16mm)		 96.33"
(2,446.78mm)		 7.81"
(198.38mm)		 114th Driest
Driest since:
 1930
13th Wettest
Wettest to Date
 1997
Jan 1901–Dec 1904
48-Month 		134.97"
(3,428.24mm)		 128.33"
(3,259.58mm)		 6.64"
(168.66mm)		 99th Driest
Driest since:
 1931
27th Wettest
Wettest since:
 1998
Jan 1900–Dec 1904
60-Month 		166.28"
(4,223.51mm)		 160.34"
(4,072.64mm)		 5.94"
(150.87mm)		 94th Driest
Driest since:
 1932
31st Wettest
Wettest since:
 1999

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