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 1991

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 1991
1-Month
30.7°F
(-0.7°C)
28.1°F
(-2.2°C)
2.6°F
(1.5°C)
98th Coolest
Coolest since:
1990
31st Warmest
Warmest since:
1917
Ties: 1969
Nov–Dec 1991
2-Month
32.6°F
(0.3°C)
31.4°F
(-0.3°C)
1.2°F
(0.6°C)
87th Coolest
Coolest since:
1985
42nd Warmest
Warmest since:
1917
Ties: 1906, 2018
Oct–Dec 1991
3-Month
37.2°F
(2.9°C)
36.2°F
(2.3°C)
1.0°F
(0.6°C)
91st Coolest
Coolest since:
1985
38th Warmest
Warmest since:
1917
Ties: 1929, 2003
Sep–Dec 1991
4-Month
42.6°F
(5.9°C)
41.0°F
(5.0°C)
1.6°F
(0.9°C)
103rd Coolest
Coolest since:
1985
26th Warmest
Warmest since:
1917
Ties: 1907, 1943, 2003
Aug–Dec 1991
5-Month
47.3°F
(8.5°C)
45.5°F
(7.5°C)
1.8°F
(1.0°C)
112th Coolest
Coolest since:
1985
17th Warmest
Warmest since:
1917, 2014
Ties: 1950, 1998, 2003, 2021
Jul–Dec 1991
6-Month
50.3°F
(10.2°C)
48.6°F
(9.2°C)
1.7°F
(1.0°C)
110th Coolest
Coolest since:
1985
19th Warmest
Warmest since:
2014
Jun–Dec 1991
7-Month
50.9°F
(10.5°C)
49.8°F
(9.9°C)
1.1°F
(0.6°C)
100th Coolest
Coolest since:
1916
29th Warmest
Warmest since:
2021
Ties: 1950
May–Dec 1991
8-Month
50.4°F
(10.2°C)
49.7°F
(9.8°C)
0.7°F
(0.4°C)
85th Coolest
Coolest since:
1916
44th Warmest
Warmest since:
2021
Ties: 1949, 1950, 1969, 1986, 1995
Apr–Dec 1991
9-Month
49.4°F
(9.7°C)
49.0°F
(9.4°C)
0.4°F
(0.3°C)
72nd Coolest
Coolest since:
1916
57th Warmest
Warmest since:
2021
Ties: 1942, 1950, 1986, 2005, 2009
Mar–Dec 1991
10-Month
48.0°F
(8.9°C)
47.7°F
(8.7°C)
0.3°F
(0.2°C)
75th Coolest
Coolest since:
1916
54th Warmest
Warmest since:
2015
Ties: 1906, 1915, 1918, 1953, 1957, 1962, 1969, 1977, 1980
Feb–Dec 1991
11-Month
47.1°F
(8.4°C)
46.1°F
(7.8°C)
1.0°F
(0.6°C)
98th Coolest
Coolest since:
1955
31st Warmest
Warmest since:
2015
Ties: 1979, 1981, 1995
Jan–Dec 1991
12-Month
45.4°F
(7.4°C)
44.5°F
(6.9°C)
0.9°F
(0.5°C)
95th Coolest
Coolest since:
1916
34th Warmest
Warmest since:
2015
Ties: 1961, 1990, 1997
Jul 1990–Dec 1991
18-Month
46.5°F
(8.1°C)
45.8°F
(7.7°C)
0.7°F
(0.4°C)
86th Coolest
Coolest since:
1985
42nd Warmest
Warmest since:
2015
Ties: 1959, 1966, 2001, 2009
Jan 1990–Dec 1991
24-Month
45.4°F
(7.4°C)
44.5°F
(6.9°C)
0.9°F
(0.5°C)
96th Coolest
Coolest since:
1917
32nd Warmest
Warmest since:
2015
Ties: 1958, 1981
Jan 1989–Dec 1991
36-Month
45.1°F
(7.3°C)
44.4°F
(6.9°C)
0.7°F
(0.4°C)
86th Coolest
Coolest since:
1913
41st Warmest
Warmest since:
2016
Ties: 1960, 1981, 1995, 2009
Jan 1988–Dec 1991
48-Month
45.3°F
(7.4°C)
44.4°F
(6.9°C)
0.9°F
(0.5°C)
96th Coolest
Coolest since:
1913, 1914, 1919
30th Warmest
Warmest since:
2016, 2017
Ties: 1993, 2009, 2013
Jan 1987–Dec 1991
60-Month
45.5°F
(7.5°C)
44.4°F
(6.9°C)
1.1°F
(0.6°C)
104th Coolest
Coolest since:
1913
21st Warmest
Warmest since:
2018
Ties: 1941, 1942, 1995, 1999

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