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 1955

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 1955
1-Month
8.43"
(214.12mm)
4.63"
(117.60mm)
3.80"
(96.52mm)
123rd Driest
Driest since:
1976
5th Wettest
Wettest since:
1964
Nov–Dec 1955
2-Month
14.32"
(363.73mm)
8.97"
(227.84mm)
5.35"
(135.89mm)
123rd Driest
Driest since:
1976
5th Wettest
Wettest since:
1996
Oct–Dec 1955
3-Month
18.40"
(467.36mm)
11.51"
(292.35mm)
6.89"
(175.01mm)
126th Driest
Driest since:
1976
2nd Wettest
Wettest to Date
1996
Sep–Dec 1955
4-Month
19.87"
(504.70mm)
12.93"
(328.42mm)
6.94"
(176.28mm)
125th Driest
Driest since:
1976
3rd Wettest
Wettest to Date
1996
Aug–Dec 1955
5-Month
20.05"
(509.27mm)
13.73"
(348.74mm)
6.32"
(160.53mm)
125th Driest
Driest since:
1936
3rd Wettest
Wettest to Date
1996
Jul–Dec 1955
6-Month
21.48"
(545.59mm)
14.46"
(367.28mm)
7.02"
(178.31mm)
126th Driest
Driest since:
1936
2nd Wettest
Wettest to Date
1996
Jun–Dec 1955
7-Month
22.86"
(580.64mm)
16.18"
(410.97mm)
6.68"
(169.67mm)
125th Driest
Driest since:
1976
3rd Wettest
Wettest to Date
1996
May–Dec 1955
8-Month
24.48"
(621.79mm)
18.32"
(465.33mm)
6.16"
(156.46mm)
126th Driest
Driest since:
1935
2nd Wettest
Wettest to Date
1996
Apr–Dec 1955
9-Month
28.22"
(716.79mm)
20.67"
(525.02mm)
7.55"
(191.77mm)
126th Driest
Driest since:
1976
2nd Wettest
Wettest to Date
1996
Mar–Dec 1955
10-Month
31.50"
(800.10mm)
23.93"
(607.82mm)
7.57"
(192.28mm)
124th Driest
Driest since:
1976
4th Wettest
Wettest to Date
1996
Feb–Dec 1955
11-Month
34.14"
(867.16mm)
27.54"
(699.52mm)
6.60"
(167.64mm)
122nd Driest
Driest since:
1935
6th Wettest
Wettest since:
1996
Jan–Dec 1955
12-Month
36.56"
(928.62mm)
32.07"
(814.58mm)
4.49"
(114.04mm)
107th Driest
Driest since:
1929
21st Wettest
Wettest since:
1996
Jul 1954–Dec 1955
18-Month
48.72"
(1,237.49mm)
46.58"
(1,183.13mm)
2.14"
(54.36mm)
86th Driest
Driest since:
1929
41st Wettest
Wettest since:
1996
Jan 1954–Dec 1955
24-Month
67.75"
(1,720.85mm)
64.19"
(1,630.43mm)
3.56"
(90.42mm)
95th Driest
Driest since:
1930
32nd Wettest
Wettest since:
1996
Jan 1953–Dec 1955
36-Month
105.70"
(2,684.78mm)
96.33"
(2,446.78mm)
9.37"
(238.00mm)
114th Driest
Driest since:
1930
12th Wettest
Wettest since:
1997
Jan 1952–Dec 1955
48-Month
129.89"
(3,299.21mm)
128.33"
(3,259.58mm)
1.56"
(39.63mm)
78th Driest
Driest since:
1931
47th Wettest
Wettest since:
1998
Jan 1951–Dec 1955
60-Month
164.77"
(4,185.16mm)
160.34"
(4,072.64mm)
4.43"
(112.52mm)
87th Driest
Driest since:
1932
37th Wettest
Wettest since:
1999

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