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 1902

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
December 1902
1-Month
6.29"
(159.77mm)
4.63"
(117.60mm)
1.66"
(42.17mm)
113th Driest
Driest since:
1976
15th Wettest
Wettest to Date
1964
Ties: 2010
Nov–Dec 1902
2-Month
12.72"
(323.09mm)
8.97"
(227.84mm)
3.75"
(95.25mm)
113th Driest
Driest since:
1976
15th Wettest
Wettest since:
1996
Ties: 1909
Oct–Dec 1902
3-Month
14.02"
(356.11mm)
11.51"
(292.35mm)
2.51"
(63.76mm)
102nd Driest
Driest since:
1976
26th Wettest
Wettest since:
1996
Ties: 1984
Sep–Dec 1902
4-Month
15.01"
(381.25mm)
12.93"
(328.42mm)
2.08"
(52.83mm)
90th Driest
Driest since:
1976
38th Wettest
Wettest since:
1996
Aug–Dec 1902
5-Month
15.48"
(393.19mm)
13.73"
(348.74mm)
1.75"
(44.45mm)
87th Driest
Driest since:
1936
41st Wettest
Wettest since:
1996
Jul–Dec 1902
6-Month
16.98"
(431.29mm)
14.46"
(367.28mm)
2.52"
(64.01mm)
100th Driest
Driest since:
1936
28th Wettest
Wettest since:
1996
Ties: 2010
Jun–Dec 1902
7-Month
17.70"
(449.58mm)
16.18"
(410.97mm)
1.52"
(38.61mm)
88th Driest
Driest since:
1976
40th Wettest
Wettest since:
1996
May–Dec 1902
8-Month
20.25"
(514.35mm)
18.32"
(465.33mm)
1.93"
(49.02mm)
91st Driest
Driest since:
1935
37th Wettest
Wettest since:
1996
Apr–Dec 1902
9-Month
23.38"
(593.85mm)
20.67"
(525.02mm)
2.71"
(68.83mm)
98th Driest
Driest since:
1976
30th Wettest
Wettest since:
1996
Mar–Dec 1902
10-Month
26.63"
(676.40mm)
23.93"
(607.82mm)
2.70"
(68.58mm)
95th Driest
Driest since:
1976
33rd Wettest
Wettest since:
1996
Feb–Dec 1902
11-Month
33.39"
(848.11mm)
27.54"
(699.52mm)
5.85"
(148.59mm)
117th Driest
Driest since:
1935
11th Wettest
Wettest to Date
1996
Jan–Dec 1902
12-Month
36.14"
(917.96mm)
32.07"
(814.58mm)
4.07"
(103.38mm)
100th Driest
Driest since:
1929
28th Wettest
Wettest since:
1996
Jul 1901–Dec 1902
18-Month
48.61"
(1,234.69mm)
46.58"
(1,183.13mm)
2.03"
(51.56mm)
84th Driest
Driest since:
1929
43rd Wettest
Wettest since:
1996
Jan 1901–Dec 1902
24-Month
66.97"
(1,701.04mm)
64.19"
(1,630.43mm)
2.78"
(70.61mm)
85th Driest
Driest since:
1930
42nd Wettest
Wettest since:
1996
Jan 1900–Dec 1902
36-Month
98.28"
(2,496.31mm)
96.33"
(2,446.78mm)
1.95"
(49.53mm)
81st Driest
Driest since:
1930
45th Wettest
Wettest since:
1997
Jan 1899–Dec 1902
48-Month
134.88"
(3,425.95mm)
128.33"
(3,259.58mm)
6.55"
(166.37mm)
97th Driest
Driest since:
1931
28th Wettest
Wettest since:
1998
Jan 1898–Dec 1902
60-Month
160.14"
(4,067.56mm)
160.34"
(4,072.64mm)
-0.20"
(-5.08mm)
59th Driest
Driest since:
1932
65th Wettest
Wettest since:
1999

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