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 2018

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
December 2018
1-Month
29.2°F
(-1.6°C)
28.1°F
(-2.2°C)
1.1°F
(0.6°C)
77th Coolest
Coolest since:
1990
51st Warmest
Warmest since:
1917
Ties: 1952, 2012
Nov–Dec 2018
2-Month
32.6°F
(0.3°C)
31.4°F
(-0.3°C)
1.2°F
(0.6°C)
86th Coolest
Coolest since:
1985
42nd Warmest
Warmest since:
1917
Ties: 1906, 1991
Oct–Dec 2018
3-Month
37.1°F
(2.8°C)
36.2°F
(2.3°C)
0.9°F
(0.5°C)
87th Coolest
Coolest since:
1985
41st Warmest
Warmest since:
1917
Ties: 1942, 1943, 1954, 1973, 1986, 2010
Sep–Dec 2018
4-Month
41.8°F
(5.4°C)
41.0°F
(5.0°C)
0.8°F
(0.4°C)
79th Coolest
Coolest since:
1985
49th Warmest
Warmest since:
1917
Ties: 1910, 1918, 1944, 1949, 1965, 1973
Aug–Dec 2018
5-Month
46.5°F
(8.1°C)
45.5°F
(7.5°C)
1.0°F
(0.6°C)
91st Coolest
Coolest since:
1985
37th Warmest
Warmest since:
1917, 2014
Jul–Dec 2018
6-Month
50.1°F
(10.1°C)
48.6°F
(9.2°C)
1.5°F
(0.9°C)
108th Coolest
Coolest since:
1985
20th Warmest
Warmest since:
2014
Ties: 1934
Jun–Dec 2018
7-Month
51.2°F
(10.7°C)
49.8°F
(9.9°C)
1.4°F
(0.8°C)
109th Coolest
Coolest since:
1916
19th Warmest
Warmest since:
2021
Ties: 1979, 2001, 2002
May–Dec 2018
8-Month
51.6°F
(10.9°C)
49.7°F
(9.8°C)
1.9°F
(1.1°C)
120th Coolest
Coolest since:
1916
8th Warmest
Warmest since:
2021
Ties: 1934, 1939, 1940
Apr–Dec 2018
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: 1940, 2003, 2016, 2017
Mar–Dec 2018
10-Month
49.3°F
(9.6°C)
47.7°F
(8.7°C)
1.6°F
(0.9°C)
113th Coolest
Coolest since:
1916
15th Warmest
Warmest since:
2015
Ties: 2012
Feb–Dec 2018
11-Month
47.5°F
(8.6°C)
46.1°F
(7.8°C)
1.4°F
(0.8°C)
109th Coolest
Coolest since:
1955
19th Warmest
Warmest since:
2015
Jan–Dec 2018
12-Month
46.4°F
(8.0°C)
44.5°F
(6.9°C)
1.9°F
(1.1°C)
117th Coolest
Coolest since:
1916
11th Warmest
Warmest since:
2015
Ties: 1987, 2004
Jul 2017–Dec 2018
18-Month
47.8°F
(8.8°C)
45.8°F
(7.7°C)
2.0°F
(1.1°C)
117th Coolest
Coolest since:
1985
10th Warmest
Warmest since:
2015
Jan 2017–Dec 2018
24-Month
46.1°F
(7.8°C)
44.4°F
(6.9°C)
1.7°F
(0.9°C)
116th Coolest
Coolest since:
1917
11th Warmest
Warmest since:
2015
Ties: 1934, 1941, 2003
Jan 2016–Dec 2018
36-Month
46.4°F
(8.0°C)
44.5°F
(6.9°C)
1.9°F
(1.1°C)
122nd Coolest
Coolest since:
1913
4th Warmest
Warmest since:
2016
Jan 2015–Dec 2018
48-Month
46.9°F
(8.3°C)
44.5°F
(6.9°C)
2.4°F
(1.4°C)
122nd Coolest
Coolest since:
1913, 1914, 1919
3rd Warmest
Warmest since:
2016, 2017
Jan 2014–Dec 2018
60-Month
46.9°F
(8.3°C)
44.4°F
(6.9°C)
2.5°F
(1.4°C)
123rd Coolest
Coolest since:
1913
1st Warmest
Warmest to Date
2018

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