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 1939

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 1939
1-Month
34.7°F
(1.5°C)
28.1°F
(-2.2°C)
6.6°F
(3.7°C)
127th Coolest
Coolest since:
1990
2nd Warmest
Warmest since:
1917
Ties: 1933
Nov–Dec 1939
2-Month
36.0°F
(2.2°C)
31.4°F
(-0.3°C)
4.6°F
(2.5°C)
127th Coolest
Coolest since:
1985
2nd Warmest
Warmest since:
1917
Oct–Dec 1939
3-Month
39.4°F
(4.1°C)
36.2°F
(2.3°C)
3.2°F
(1.8°C)
125th Coolest
Coolest since:
1985
4th Warmest
Warmest since:
1917
Ties: 1937
Sep–Dec 1939
4-Month
43.8°F
(6.6°C)
41.0°F
(5.0°C)
2.8°F
(1.6°C)
124th Coolest
Coolest since:
1985
5th Warmest
Warmest since:
1917
Aug–Dec 1939
5-Month
48.0°F
(8.9°C)
45.4°F
(7.4°C)
2.6°F
(1.5°C)
125th Coolest
Coolest since:
1985
4th Warmest
Warmest since:
1917, 2014
Jul–Dec 1939
6-Month
51.0°F
(10.6°C)
48.7°F
(9.3°C)
2.3°F
(1.3°C)
125th Coolest
Coolest since:
1985
4th Warmest
Warmest since:
2014
Ties: 2012, 2022
Jun–Dec 1939
7-Month
51.5°F
(10.8°C)
49.8°F
(9.9°C)
1.7°F
(0.9°C)
117th Coolest
Coolest since:
1916
12th Warmest
Warmest since:
2021
Ties: 1933, 1937, 1998
May–Dec 1939
8-Month
51.6°F
(10.9°C)
49.8°F
(9.9°C)
1.8°F
(1.0°C)
121st Coolest
Coolest since:
1916
8th Warmest
Warmest since:
2021
Ties: 1934, 1940, 2018
Apr–Dec 1939
9-Month
51.0°F
(10.6°C)
49.0°F
(9.4°C)
2.0°F
(1.2°C)
123rd Coolest
Coolest since:
1916
6th Warmest
Warmest since:
2021
Ties: 1987
Mar–Dec 1939
10-Month
49.6°F
(9.8°C)
47.7°F
(8.7°C)
1.9°F
(1.1°C)
121st Coolest
Coolest since:
1916
8th Warmest
Warmest since:
2015
Ties: 1992, 2003, 2016, 2017
Feb–Dec 1939
11-Month
47.4°F
(8.6°C)
46.1°F
(7.8°C)
1.3°F
(0.8°C)
109th Coolest
Coolest since:
1955
20th Warmest
Warmest since:
2015
Ties: 1925, 2013
Jan–Dec 1939
12-Month
46.0°F
(7.8°C)
44.5°F
(6.9°C)
1.5°F
(0.9°C)
111th Coolest
Coolest since:
1916
18th Warmest
Warmest since:
2015
Ties: 2006, 2007
Jul 1938–Dec 1939
18-Month
47.1°F
(8.4°C)
45.8°F
(7.7°C)
1.3°F
(0.7°C)
108th Coolest
Coolest since:
1985
20th Warmest
Warmest since:
2015
Ties: 1941, 1967, 1987, 2005, 2006
Jan 1938–Dec 1939
24-Month
45.6°F
(7.6°C)
44.5°F
(6.9°C)
1.1°F
(0.7°C)
102nd Coolest
Coolest since:
1917
26th Warmest
Warmest since:
2015
Ties: 1959, 2019
Jan 1937–Dec 1939
36-Month
45.0°F
(7.2°C)
44.4°F
(6.9°C)
0.6°F
(0.3°C)
81st Coolest
Coolest since:
1913
46th Warmest
Warmest since:
2016
Ties: 1959, 1963
Jan 1936–Dec 1939
48-Month
44.9°F
(7.2°C)
44.4°F
(6.9°C)
0.5°F
(0.3°C)
80th Coolest
Coolest since:
1913, 1914, 1919
46th Warmest
Warmest since:
2016, 2017
Ties: 1926, 1981
Jan 1935–Dec 1939
60-Month
44.7°F
(7.1°C)
44.4°F
(6.9°C)
0.3°F
(0.2°C)
72nd Coolest
Coolest since:
1913
53rd Warmest
Warmest since:
2018
Ties: 1927, 1963, 1968, 1983

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