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 1927

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 1927
1-Month
3.05"
(77.47mm)
4.63"
(117.60mm)
-1.58"
(-40.13mm)
24th Driest
Driest since:
1976
104th Wettest
Wettest since:
1964
Nov–Dec 1927
2-Month
10.35"
(262.89mm)
8.97"
(227.84mm)
1.38"
(35.05mm)
89th Driest
Driest since:
1976
39th Wettest
Wettest since:
1996
Oct–Dec 1927
3-Month
13.34"
(338.84mm)
11.51"
(292.35mm)
1.83"
(46.49mm)
88th Driest
Driest since:
1976
40th Wettest
Wettest since:
1996
Sep–Dec 1927
4-Month
16.66"
(423.16mm)
12.93"
(328.42mm)
3.73"
(94.74mm)
113th Driest
Driest since:
1976
15th Wettest
Wettest since:
1996
Aug–Dec 1927
5-Month
17.53"
(445.26mm)
13.73"
(348.74mm)
3.80"
(96.52mm)
115th Driest
Driest since:
1936
13th Wettest
Wettest since:
1996
Jul–Dec 1927
6-Month
17.80"
(452.12mm)
14.46"
(367.28mm)
3.34"
(84.84mm)
107th Driest
Driest since:
1936
21st Wettest
Wettest since:
1996
Jun–Dec 1927
7-Month
19.25"
(488.95mm)
16.18"
(410.97mm)
3.07"
(77.98mm)
104th Driest
Driest since:
1976
24th Wettest
Wettest since:
1996
May–Dec 1927
8-Month
21.96"
(557.78mm)
18.32"
(465.33mm)
3.64"
(92.45mm)
107th Driest
Driest since:
1935
21st Wettest
Wettest since:
1996
Apr–Dec 1927
9-Month
23.86"
(606.04mm)
20.67"
(525.02mm)
3.19"
(81.02mm)
104th Driest
Driest since:
1976
24th Wettest
Wettest since:
1996
Mar–Dec 1927
10-Month
26.47"
(672.34mm)
23.93"
(607.82mm)
2.54"
(64.52mm)
94th Driest
Driest since:
1976
34th Wettest
Wettest since:
1996
Feb–Dec 1927
11-Month
31.94"
(811.28mm)
27.54"
(699.52mm)
4.40"
(111.76mm)
106th Driest
Driest since:
1935
22nd Wettest
Wettest since:
1996
Jan–Dec 1927
12-Month
36.64"
(930.66mm)
32.07"
(814.58mm)
4.57"
(116.08mm)
109th Driest
Driest since:
1929
19th Wettest
Wettest since:
1996
Jul 1926–Dec 1927
18-Month
53.53"
(1,359.66mm)
46.58"
(1,183.13mm)
6.95"
(176.53mm)
111th Driest
Driest since:
1929
16th Wettest
Wettest since:
1996
Jan 1926–Dec 1927
24-Month
66.95"
(1,700.53mm)
64.19"
(1,630.43mm)
2.76"
(70.10mm)
84th Driest
Driest since:
1930
43rd Wettest
Wettest since:
1996
Jan 1925–Dec 1927
36-Month
96.69"
(2,455.93mm)
96.33"
(2,446.78mm)
0.36"
(9.15mm)
65th Driest
Driest since:
1930
61st Wettest
Wettest since:
1997
Jan 1924–Dec 1927
48-Month
122.65"
(3,115.31mm)
128.33"
(3,259.58mm)
-5.68"
(-144.27mm)
32nd Driest
Driest since:
1931
93rd Wettest
Wettest since:
1998
Jan 1923–Dec 1927
60-Month
153.25"
(3,892.55mm)
160.34"
(4,072.64mm)
-7.09"
(-180.09mm)
29th Driest
Driest since:
1932
95th Wettest
Wettest since:
1999

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