Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. 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 1920

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
December 1920
1-Month 		29.6°F
(-1.3°C)		 28.1°F
(-2.2°C)		 1.5°F
(0.9°C)		 83rd Coolest
Coolest since:
 1990
46th Warmest
Warmest since:
 1917
Ties: 1901
Nov–Dec 1920
2-Month 		31.7°F
(-0.2°C)		 31.4°F
(-0.3°C)		 0.3°F
(0.1°C)		 64th Coolest
Coolest since:
 1985
65th Warmest
Warmest since:
 1917
Ties: 1946, 1947, 2007
Oct–Dec 1920
3-Month 		35.5°F
(1.9°C)		 36.2°F
(2.3°C)		 -0.7°F
(-0.4°C)		 38th Coolest
Coolest since:
 1985
91st Warmest
Warmest since:
 1917
Ties: 1895, 1908, 1927
Sep–Dec 1920
4-Month 		40.4°F
(4.7°C)		 41.1°F
(5.1°C)		 -0.7°F
(-0.4°C)		 37th Coolest
Coolest since:
 1985
92nd Warmest
Warmest since:
 1917
Ties: 1897, 1903, 1915, 1932, 1968
Aug–Dec 1920
5-Month 		45.0°F
(7.2°C)		 45.5°F
(7.5°C)		 -0.5°F
(-0.3°C)		 43rd Coolest
Coolest since:
 1985
86th Warmest
Warmest since:
 1917, 2014
Ties: 1922, 1993
Jul–Dec 1920
6-Month 		48.4°F
(9.1°C)		 48.6°F
(9.2°C)		 -0.2°F
(-0.1°C)		 48th Coolest
Coolest since:
 1985
81st Warmest
Warmest since:
 2014
Ties: 1915, 1986
Jun–Dec 1920
7-Month 		49.3°F
(9.6°C)		 49.8°F
(9.9°C)		 -0.5°F
(-0.3°C)		 39th Coolest
Coolest since:
 1916
90th Warmest
Warmest since:
 2021
Ties: 1915
May–Dec 1920
8-Month 		49.0°F
(9.4°C)		 49.8°F
(9.9°C)		 -0.8°F
(-0.5°C)		 26th Coolest
Coolest since:
 1916
103rd Warmest
Warmest since:
 2021
Ties: 1896, 1982
Apr–Dec 1920
9-Month 		47.9°F
(8.8°C)		 49.0°F
(9.4°C)		 -1.1°F
(-0.6°C)		 17th Coolest
Coolest since:
 1916
112th Warmest
Warmest since:
 2021
Ties: 1903, 1971
Mar–Dec 1920
10-Month 		46.5°F
(8.1°C)		 47.7°F
(8.7°C)		 -1.2°F
(-0.6°C)		 15th Coolest
Coolest since:
 1916
114th Warmest
Warmest since:
 2015
Ties: 1896, 1903, 1975
Feb–Dec 1920
11-Month 		45.1°F
(7.3°C)		 46.1°F
(7.8°C)		 -1.0°F
(-0.5°C)		 20th Coolest
Coolest since:
 1955
109th Warmest
Warmest since:
 2015
Ties: 1902
Jan–Dec 1920
12-Month 		43.5°F
(6.4°C)		 44.5°F
(6.9°C)		 -1.0°F
(-0.5°C)		 22nd Coolest
Coolest since:
 1916
107th Warmest
Warmest since:
 2015
Ties: 1898, 1902, 1917, 1930, 1951
Jul 1919–Dec 1920
18-Month 		44.4°F
(6.9°C)		 45.8°F
(7.7°C)		 -1.4°F
(-0.8°C)		 9th Coolest
Coolest since:
 1985
119th Warmest
Warmest since:
 2015
Ties: 1899
Jan 1919–Dec 1920
24-Month 		43.4°F
(6.3°C)		 44.4°F
(6.9°C)		 -1.0°F
(-0.6°C)		 13th Coolest
Coolest since:
 1917
115th Warmest
Warmest since:
 2015
Ties: 1896, 1922
Jan 1918–Dec 1920
36-Month 		43.9°F
(6.6°C)		 44.4°F
(6.9°C)		 -0.5°F
(-0.3°C)		 29th Coolest
Coolest since:
 1913
98th Warmest
Warmest since:
 2016
Ties: 1900, 1910, 1919, 1932, 1984
Jan 1917–Dec 1920
48-Month 		43.8°F
(6.6°C)		 44.4°F
(6.9°C)		 -0.6°F
(-0.3°C)		 20th Coolest
Coolest since:
 1913, 1914, 1919
106th Warmest
Warmest since:
 2016, 2017
Ties: 1915, 1950
Jan 1916–Dec 1920
60-Month 		43.4°F
(6.3°C)		 44.4°F
(6.9°C)		 -1.0°F
(-0.6°C)		 2nd Coolest
Coolest since:
 1913
123rd Warmest
Warmest since:
 2018
Ties: 1916

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