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 1970

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 1970
1-Month
5.76"
(146.30mm)
4.63"
(117.60mm)
1.13"
(28.70mm)
93rd Driest
Driest since:
1976
35th Wettest
Wettest since:
1964
Nov–Dec 1970
2-Month
11.21"
(284.73mm)
8.97"
(227.84mm)
2.24"
(56.89mm)
105th Driest
Driest since:
1976
23rd Wettest
Wettest since:
1996
Ties: 1948
Oct–Dec 1970
3-Month
13.87"
(352.30mm)
11.51"
(292.35mm)
2.36"
(59.95mm)
98th Driest
Driest since:
1976
30th Wettest
Wettest since:
1996
Sep–Dec 1970
4-Month
15.75"
(400.05mm)
12.93"
(328.42mm)
2.82"
(71.63mm)
104th Driest
Driest since:
1976
24th Wettest
Wettest since:
1996
Ties: 1951
Aug–Dec 1970
5-Month
15.96"
(405.38mm)
13.73"
(348.74mm)
2.23"
(56.64mm)
95th Driest
Driest since:
1936
33rd Wettest
Wettest since:
1996
Jul–Dec 1970
6-Month
16.66"
(423.16mm)
14.46"
(367.28mm)
2.20"
(55.88mm)
95th Driest
Driest since:
1936
33rd Wettest
Wettest since:
1996
Jun–Dec 1970
7-Month
18.51"
(470.15mm)
16.18"
(410.97mm)
2.33"
(59.18mm)
97th Driest
Driest since:
1976
31st Wettest
Wettest since:
1996
May–Dec 1970
8-Month
20.06"
(509.52mm)
18.32"
(465.33mm)
1.74"
(44.19mm)
89th Driest
Driest since:
1935
39th Wettest
Wettest since:
1996
Ties: 2006
Apr–Dec 1970
9-Month
22.76"
(578.10mm)
20.67"
(525.02mm)
2.09"
(53.08mm)
92nd Driest
Driest since:
1976
36th Wettest
Wettest since:
1996
Mar–Dec 1970
10-Month
25.37"
(644.40mm)
23.93"
(607.82mm)
1.44"
(36.58mm)
84th Driest
Driest since:
1976
44th Wettest
Wettest since:
1996
Feb–Dec 1970
11-Month
27.73"
(704.34mm)
27.54"
(699.52mm)
0.19"
(4.82mm)
65th Driest
Driest since:
1935
63rd Wettest
Wettest since:
1996
Jan–Dec 1970
12-Month
36.19"
(919.23mm)
32.07"
(814.58mm)
4.12"
(104.65mm)
103rd Driest
Driest since:
1929
25th Wettest
Wettest since:
1996
Jul 1969–Dec 1970
18-Month
48.14"
(1,222.76mm)
46.58"
(1,183.13mm)
1.56"
(39.63mm)
78th Driest
Driest since:
1929
49th Wettest
Wettest since:
1996
Jan 1969–Dec 1970
24-Month
66.02"
(1,676.91mm)
64.19"
(1,630.43mm)
1.83"
(46.48mm)
77th Driest
Driest since:
1930
50th Wettest
Wettest since:
1996
Ties: 1949
Jan 1968–Dec 1970
36-Month
102.20"
(2,595.88mm)
96.33"
(2,446.78mm)
5.87"
(149.10mm)
104th Driest
Driest since:
1930
22nd Wettest
Wettest since:
1997
Jan 1967–Dec 1970
48-Month
133.31"
(3,386.07mm)
128.33"
(3,259.58mm)
4.98"
(126.49mm)
95th Driest
Driest since:
1931
30th Wettest
Wettest since:
1998
Jan 1966–Dec 1970
60-Month
162.98"
(4,139.69mm)
160.34"
(4,072.64mm)
2.64"
(67.05mm)
77th Driest
Driest since:
1932
47th Wettest
Wettest since:
1999

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