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.

Pacific Northwest Basin

Average Temperature Rankings, December 1940

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  • Record Coolest
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  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
December 1940
1-Month
30.9°F
(-0.6°C)
28.1°F
(-2.2°C)
2.8°F
(1.6°C)
102nd Coolest
Coolest since:
1990
26th Warmest
Warmest since:
1917
Nov–Dec 1940
2-Month
30.8°F
(-0.7°C)
31.3°F
(-0.4°C)
-0.5°F
(-0.3°C)
42nd Coolest
Coolest since:
1985
86th Warmest
Warmest since:
1917
Ties: 1902, 1936, 1956, 1968, 2013
Oct–Dec 1940
3-Month
36.7°F
(2.6°C)
36.1°F
(2.3°C)
0.6°F
(0.3°C)
73rd Coolest
Coolest since:
1985
55th Warmest
Warmest since:
1917
Ties: 1977
Sep–Dec 1940
4-Month
42.0°F
(5.6°C)
41.0°F
(5.0°C)
1.0°F
(0.6°C)
85th Coolest
Coolest since:
1985
43rd Warmest
Warmest since:
1917
Ties: 1952, 2008, 2010
Aug–Dec 1940
5-Month
46.6°F
(8.1°C)
45.5°F
(7.5°C)
1.1°F
(0.6°C)
93rd Coolest
Coolest since:
1985
35th Warmest
Warmest since:
1917, 2014
Ties: 1942
Jul–Dec 1940
6-Month
49.7°F
(9.8°C)
48.6°F
(9.2°C)
1.1°F
(0.6°C)
97th Coolest
Coolest since:
1985
31st Warmest
Warmest since:
2014
Ties: 1942, 1981, 2013
Jun–Dec 1940
7-Month
51.3°F
(10.7°C)
49.8°F
(9.9°C)
1.5°F
(0.8°C)
112th Coolest
Coolest since:
1916
16th Warmest
Warmest since:
2021
Ties: 1988, 2006
May–Dec 1940
8-Month
51.6°F
(10.9°C)
49.8°F
(9.9°C)
1.8°F
(1.0°C)
120th Coolest
Coolest since:
1916
8th Warmest
Warmest since:
2021
Ties: 1934, 1939, 2018
Apr–Dec 1940
9-Month
50.8°F
(10.4°C)
49.0°F
(9.4°C)
1.8°F
(1.0°C)
119th Coolest
Coolest since:
1916
9th Warmest
Warmest since:
2021
Ties: 2003, 2016, 2017, 2018
Mar–Dec 1940
10-Month
49.7°F
(9.8°C)
47.7°F
(8.7°C)
2.0°F
(1.1°C)
122nd Coolest
Coolest since:
1916
6th Warmest
Warmest since:
2015
Ties: 1987
Feb–Dec 1940
11-Month
48.2°F
(9.0°C)
46.1°F
(7.8°C)
2.1°F
(1.2°C)
119th Coolest
Coolest since:
1955
9th Warmest
Warmest since:
2015
Jan–Dec 1940
12-Month
46.5°F
(8.1°C)
44.4°F
(6.9°C)
2.1°F
(1.2°C)
119th Coolest
Coolest since:
1916
9th Warmest
Warmest since:
2015
Ties: 2020
Jul 1939–Dec 1940
18-Month
48.0°F
(8.9°C)
45.8°F
(7.7°C)
2.2°F
(1.2°C)
121st Coolest
Coolest since:
1985
6th Warmest
Warmest since:
2015
Jan 1939–Dec 1940
24-Month
46.2°F
(7.9°C)
44.4°F
(6.9°C)
1.8°F
(1.0°C)
120th Coolest
Coolest since:
1917
7th Warmest
Warmest to Date
2015
Ties: 1987, 1988, 1992
Jan 1938–Dec 1940
36-Month
45.9°F
(7.7°C)
44.4°F
(6.9°C)
1.5°F
(0.8°C)
113th Coolest
Coolest since:
1913
13th Warmest
Warmest to Date
2016
Ties: 1992, 2007, 2020
Jan 1937–Dec 1940
48-Month
45.4°F
(7.4°C)
44.5°F
(6.9°C)
0.9°F
(0.5°C)
98th Coolest
Coolest since:
1913, 1914, 1919
27th Warmest
Warmest to Date
2016, 2017
Ties: 2002
Jan 1936–Dec 1940
60-Month
45.2°F
(7.3°C)
44.4°F
(6.9°C)
0.8°F
(0.4°C)
93rd Coolest
Coolest since:
1913
31st Warmest
Warmest to Date
2018
Ties: 1993, 2013

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