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 1948

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
December 1948
1-Month
6.05"
(153.67mm)
4.63"
(117.60mm)
1.42"
(36.07mm)
106th Driest
Driest since:
1976
23rd Wettest
Wettest since:
1964
Nov–Dec 1948
2-Month
11.21"
(284.73mm)
8.97"
(227.84mm)
2.24"
(56.89mm)
106th Driest
Driest since:
1976
23rd Wettest
Wettest since:
1996
Ties: 1970
Oct–Dec 1948
3-Month
12.91"
(327.91mm)
11.51"
(292.35mm)
1.40"
(35.56mm)
84th Driest
Driest since:
1976
45th Wettest
Wettest since:
1996
Sep–Dec 1948
4-Month
14.82"
(376.43mm)
12.93"
(328.42mm)
1.89"
(48.01mm)
89th Driest
Driest since:
1976
40th Wettest
Wettest since:
1996
Aug–Dec 1948
5-Month
15.84"
(402.34mm)
13.73"
(348.74mm)
2.11"
(53.60mm)
93rd Driest
Driest since:
1936
36th Wettest
Wettest since:
1996
Jul–Dec 1948
6-Month
17.05"
(433.07mm)
14.46"
(367.28mm)
2.59"
(65.79mm)
102nd Driest
Driest since:
1936
27th Wettest
Wettest since:
1996
Jun–Dec 1948
7-Month
19.83"
(503.68mm)
16.18"
(410.97mm)
3.65"
(92.71mm)
110th Driest
Driest since:
1976
19th Wettest
Wettest since:
1996
Ties: 1982
May–Dec 1948
8-Month
23.87"
(606.30mm)
18.32"
(465.33mm)
5.55"
(140.97mm)
118th Driest
Driest since:
1935
11th Wettest
Wettest since:
1996
Apr–Dec 1948
9-Month
27.26"
(692.40mm)
20.67"
(525.02mm)
6.59"
(167.38mm)
125th Driest
Driest since:
1976
4th Wettest
Wettest to Date
1996
Mar–Dec 1948
10-Month
30.25"
(768.35mm)
23.93"
(607.82mm)
6.32"
(160.53mm)
122nd Driest
Driest since:
1976
7th Wettest
Wettest to Date
1996
Feb–Dec 1948
11-Month
34.80"
(883.92mm)
27.54"
(699.52mm)
7.26"
(184.40mm)
125th Driest
Driest since:
1935
4th Wettest
Wettest to Date
1996
Jan–Dec 1948
12-Month
39.06"
(992.12mm)
32.07"
(814.58mm)
6.99"
(177.54mm)
122nd Driest
Driest since:
1929
7th Wettest
Wettest since:
1996
Jul 1947–Dec 1948
18-Month
54.65"
(1,388.11mm)
46.58"
(1,183.13mm)
8.07"
(204.98mm)
120th Driest
Driest since:
1929
8th Wettest
Wettest to Date
1996
Jan 1947–Dec 1948
24-Month
70.01"
(1,778.25mm)
64.19"
(1,630.43mm)
5.82"
(147.82mm)
110th Driest
Driest since:
1930
18th Wettest
Wettest since:
1996
Jan 1946–Dec 1948
36-Month
103.24"
(2,622.30mm)
96.33"
(2,446.78mm)
6.91"
(175.52mm)
109th Driest
Driest since:
1930
18th Wettest
Wettest since:
1997
Jan 1945–Dec 1948
48-Month
139.67"
(3,547.62mm)
128.33"
(3,259.58mm)
11.34"
(288.04mm)
115th Driest
Driest since:
1931
11th Wettest
Wettest to Date
1998
Jan 1944–Dec 1948
60-Month
164.45"
(4,177.03mm)
160.34"
(4,072.64mm)
4.11"
(104.39mm)
87th Driest
Driest since:
1932
38th Wettest
Wettest since:
1999

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