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.

Upper Colorado River Basin

Average Temperature Rankings, December 1931

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Warmest/Coolest
Since		 Record
December 1931
1-Month 		16.1°F
(-8.8°C)		 23.0°F
(-5.0°C)		 -6.9°F
(-3.8°C)		 6th Coolest
Coolest since:
 1909
123rd Warmest
Warmest since:
 1980
Nov–Dec 1931
2-Month 		22.1°F
(-5.5°C)		 27.5°F
(-2.5°C)		 -5.4°F
(-3.0°C)		 3rd Coolest
Coolest since:
 1895
126th Warmest
Warmest since:
 2017
Oct–Dec 1931
3-Month 		30.3°F
(-0.9°C)		 33.5°F
(0.8°C)		 -3.2°F
(-1.7°C)		 8th Coolest
Coolest since:
 1898
121st Warmest
Warmest since:
 1950, 2017
Ties: 1912
Sep–Dec 1931
4-Month 		37.2°F
(2.9°C)		 39.2°F
(4.0°C)		 -2.0°F
(-1.1°C)		 16th Coolest
Coolest since:
 1898, 1912
113th Warmest
Warmest since:
 2021
Ties: 1913, 1972
Aug–Dec 1931
5-Month 		42.9°F
(6.1°C)		 44.3°F
(6.8°C)		 -1.4°F
(-0.7°C)		 21st Coolest
Coolest since:
 1912
108th Warmest
Warmest since:
 2021
Ties: 1913, 1928
Jul–Dec 1931
6-Month 		47.3°F
(8.5°C)		 48.1°F
(8.9°C)		 -0.8°F
(-0.4°C)		 32nd Coolest
Coolest since:
 1912
97th Warmest
Warmest since:
 2021
Ties: 1914, 1915
Jun–Dec 1931
7-Month 		49.6°F
(9.8°C)		 49.9°F
(9.9°C)		 -0.3°F
(-0.1°C)		 49th Coolest
Coolest since:
 1912
80th Warmest
Warmest since:
 2021
Ties: 1956, 1964, 1967
May–Dec 1931
8-Month 		49.6°F
(9.8°C)		 50.0°F
(10.0°C)		 -0.4°F
(-0.2°C)		 41st Coolest
Coolest since:
 1912
88th Warmest
Warmest since:
 2021
Ties: 1965, 1967
Apr–Dec 1931
9-Month 		48.8°F
(9.3°C)		 49.1°F
(9.5°C)		 -0.3°F
(-0.2°C)		 49th Coolest
Coolest since:
 1912
80th Warmest
Warmest since:
 2021
Ties: 1914, 1944
Mar–Dec 1931
10-Month 		47.0°F
(8.3°C)		 47.5°F
(8.6°C)		 -0.5°F
(-0.3°C)		 44th Coolest
Coolest since:
 1912
85th Warmest
Warmest since:
 2012
Ties: 1918, 1952
Feb–Dec 1931
11-Month 		45.5°F
(7.5°C)		 45.5°F
(7.5°C)		 0.0°F
(0.0°C)		 57th Coolest
Coolest since:
 1912
72nd Warmest
Warmest since:
 2017
Ties: 1935, 1967
Jan–Dec 1931
12-Month 		43.4°F
(6.3°C)		 43.4°F
(6.3°C)		 0.0°F
(0.0°C)		 55th Coolest
Coolest since:
 1895, 1912
74th Warmest
Warmest since:
 2012
Ties: 1904, 1941, 1961
Jul 1930–Dec 1931
18-Month 		44.3°F
(6.8°C)		 45.0°F
(7.2°C)		 -0.7°F
(-0.4°C)		 29th Coolest
Coolest since:
 1912
99th Warmest
Warmest since:
 1934
Ties: 1925
Jan 1930–Dec 1931
24-Month 		42.8°F
(6.0°C)		 43.4°F
(6.3°C)		 -0.6°F
(-0.3°C)		 32nd Coolest
Coolest since:
 1913
96th Warmest
Warmest since:
 2018
Ties: 1945, 1968, 1976
Jan 1929–Dec 1931
36-Month 		42.4°F
(5.8°C)		 43.4°F
(6.3°C)		 -1.0°F
(-0.5°C)		 15th Coolest
Coolest since:
 1899, 1913
112th Warmest
Warmest since:
 2017
Ties: 1900, 1904, 1909, 1915, 1925, 1932
Jan 1928–Dec 1931
48-Month 		42.6°F
(5.9°C)		 43.4°F
(6.3°C)		 -0.8°F
(-0.4°C)		 19th Coolest
Coolest since:
 1898
107th Warmest
Warmest since:
 2018
Ties: 1908, 1911, 1933, 1976
Jan 1927–Dec 1931
60-Month 		42.7°F
(5.9°C)		 43.4°F
(6.3°C)		 -0.7°F
(-0.4°C)		 19th Coolest
Coolest since:
 1899
106th Warmest
Warmest since:
 2018
Ties: 1901, 1905, 1907, 1908, 1926

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