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 2020

View Period (Months):
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  • Record Coolest
  • Bottom 1/10
  • Bottom 1/3
  • Normal
  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 2020
1-Month
30.8°F
(-0.7°C)
28.1°F
(-2.2°C)
2.7°F
(1.5°C)
102nd Coolest
Coolest since:
1990
27th Warmest
Warmest since:
1917
Ties: 1941, 1977, 1981
Nov–Dec 2020
2-Month
33.2°F
(0.7°C)
31.3°F
(-0.4°C)
1.9°F
(1.1°C)
96th Coolest
Coolest since:
1985
33rd Warmest
Warmest since:
1917
Ties: 1907
Oct–Dec 2020
3-Month
38.0°F
(3.3°C)
36.2°F
(2.3°C)
1.8°F
(1.0°C)
110th Coolest
Coolest since:
1985
19th Warmest
Warmest since:
1917
Ties: 1987, 2015, 2021
Sep–Dec 2020
4-Month
43.6°F
(6.4°C)
41.1°F
(5.1°C)
2.5°F
(1.3°C)
122nd Coolest
Coolest since:
1985
7th Warmest
Warmest since:
1917
Aug–Dec 2020
5-Month
48.1°F
(8.9°C)
45.5°F
(7.5°C)
2.6°F
(1.4°C)
126th Coolest
Coolest since:
1985
3rd Warmest
Warmest since:
1917, 2014
Jul–Dec 2020
6-Month
50.9°F
(10.5°C)
48.6°F
(9.2°C)
2.3°F
(1.3°C)
122nd Coolest
Coolest since:
1985
7th Warmest
Warmest since:
2014
Ties: 2003
Jun–Dec 2020
7-Month
51.7°F
(10.9°C)
49.7°F
(9.8°C)
2.0°F
(1.1°C)
121st Coolest
Coolest since:
1916
8th Warmest
Warmest since:
2021
May–Dec 2020
8-Month
51.7°F
(10.9°C)
49.8°F
(9.9°C)
1.9°F
(1.0°C)
122nd Coolest
Coolest since:
1916
7th Warmest
Warmest since:
2021
Apr–Dec 2020
9-Month
50.9°F
(10.5°C)
49.0°F
(9.4°C)
1.9°F
(1.1°C)
121st Coolest
Coolest since:
1916
8th Warmest
Warmest since:
2021
Mar–Dec 2020
10-Month
49.4°F
(9.7°C)
47.6°F
(8.7°C)
1.8°F
(1.0°C)
115th Coolest
Coolest since:
1916
14th Warmest
Warmest since:
2015
Feb–Dec 2020
11-Month
47.8°F
(8.8°C)
46.1°F
(7.8°C)
1.7°F
(1.0°C)
116th Coolest
Coolest since:
1955
13th Warmest
Warmest since:
2015
Ties: 1926, 1988, 2007
Jan–Dec 2020
12-Month
46.5°F
(8.1°C)
44.5°F
(6.9°C)
2.0°F
(1.2°C)
120th Coolest
Coolest since:
1916
9th Warmest
Warmest since:
2015
Ties: 1940
Jul 2019–Dec 2020
18-Month
47.3°F
(8.5°C)
45.8°F
(7.7°C)
1.5°F
(0.8°C)
113th Coolest
Coolest since:
1985
15th Warmest
Warmest since:
2015
Ties: 2007, 2012
Jan 2019–Dec 2020
24-Month
45.7°F
(7.6°C)
44.4°F
(6.9°C)
1.3°F
(0.7°C)
103rd Coolest
Coolest since:
1917
25th Warmest
Warmest since:
2015
Jan 2018–Dec 2020
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
14th Warmest
Warmest since:
2016
Ties: 1940, 1992, 2007
Jan 2017–Dec 2020
48-Month
45.9°F
(7.7°C)
44.4°F
(6.9°C)
1.5°F
(0.8°C)
114th Coolest
Coolest since:
1913, 1914, 1919
12th Warmest
Warmest since:
2016, 2017
Ties: 1941
Jan 2016–Dec 2020
60-Month
46.1°F
(7.8°C)
44.4°F
(6.9°C)
1.7°F
(0.9°C)
118th Coolest
Coolest since:
1913
7th Warmest
Warmest since:
2018
Ties: 2021, 2022

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