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 1955

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
December 1955
1-Month		27.9°F
(-2.3°C)		23.0°F
(-5.0°C)		4.9°F
(2.7°C)		114th Coolest
Coolest since:
1909
15th Warmest
Warmest since:
1980
Nov–Dec 1955
2-Month		28.6°F
(-1.9°C)		27.5°F
(-2.5°C)		1.1°F
(0.6°C)		78th Coolest
Coolest since:
1895
51st Warmest
Warmest since:
2017
Ties: 2002
Oct–Dec 1955
3-Month		34.6°F
(1.4°C)		33.5°F
(0.8°C)		1.1°F
(0.6°C)		88th Coolest
Coolest since:
1898
41st Warmest
Warmest since:
1950, 2017
Ties: 1959
Sep–Dec 1955
4-Month		40.4°F
(4.7°C)		39.2°F
(4.0°C)		1.2°F
(0.7°C)		92nd Coolest
Coolest since:
1898, 1912
37th Warmest
Warmest since:
2021
Ties: 1965, 1988, 2022
Aug–Dec 1955
5-Month		45.7°F
(7.6°C)		44.3°F
(6.8°C)		1.4°F
(0.8°C)		95th Coolest
Coolest since:
1912
34th Warmest
Warmest since:
2021
Jul–Dec 1955
6-Month		49.2°F
(9.6°C)		48.1°F
(8.9°C)		1.1°F
(0.7°C)		87th Coolest
Coolest since:
1912
42nd Warmest
Warmest since:
2021
Ties: 1942, 1953, 1996
Jun–Dec 1955
7-Month		50.5°F
(10.3°C)		49.9°F
(9.9°C)		0.6°F
(0.4°C)		74th Coolest
Coolest since:
1912
55th Warmest
Warmest since:
2021
Ties: 1946, 2004
May–Dec 1955
8-Month		50.6°F
(10.3°C)		50.0°F
(10.0°C)		0.6°F
(0.3°C)		79th Coolest
Coolest since:
1912
50th Warmest
Warmest since:
2021
Ties: 1922, 1974, 1990, 1997
Apr–Dec 1955
9-Month		49.3°F
(9.6°C)		49.1°F
(9.5°C)		0.2°F
(0.1°C)		68th Coolest
Coolest since:
1912
61st Warmest
Warmest since:
2021
Ties: 1952, 1953, 1976, 1986
Mar–Dec 1955
10-Month		47.2°F
(8.4°C)		47.5°F
(8.6°C)		-0.3°F
(-0.2°C)		50th Coolest
Coolest since:
1912
79th Warmest
Warmest since:
2012
Ties: 1914, 1938
Feb–Dec 1955
11-Month		44.5°F
(6.9°C)		45.5°F
(7.5°C)		-1.0°F
(-0.6°C)		23rd Coolest
Coolest since:
1912
106th Warmest
Warmest since:
2017
Ties: 1919, 1951, 1952, 1965, 1971, 1984
Jan–Dec 1955
12-Month		42.3°F
(5.7°C)		43.4°F
(6.3°C)		-1.1°F
(-0.6°C)		24th Coolest
Coolest since:
1895, 1912
105th Warmest
Warmest since:
2012
Jul 1954–Dec 1955
18-Month		44.6°F
(7.0°C)		45.0°F
(7.2°C)		-0.4°F
(-0.2°C)		40th Coolest
Coolest since:
1912
88th Warmest
Warmest since:
1934
Ties: 1969
Jan 1954–Dec 1955
24-Month		44.0°F
(6.7°C)		43.4°F
(6.3°C)		0.6°F
(0.4°C)		78th Coolest
Coolest since:
1913
50th Warmest
Warmest since:
2018
Ties: 1947, 1958, 1960
Jan 1953–Dec 1955
36-Month		44.1°F
(6.7°C)		43.4°F
(6.3°C)		0.7°F
(0.4°C)		82nd Coolest
Coolest since:
1899, 1913
45th Warmest
Warmest since:
2017
Ties: 1954, 1959, 1963
Jan 1952–Dec 1955
48-Month		43.7°F
(6.5°C)		43.4°F
(6.3°C)		0.3°F
(0.2°C)		67th Coolest
Coolest since:
1898
59th Warmest
Warmest since:
2018
Ties: 1938, 1946, 1957, 1978
Jan 1951–Dec 1955
60-Month		43.5°F
(6.4°C)		43.4°F
(6.3°C)		0.1°F
(0.1°C)		56th Coolest
Coolest since:
1899
69th Warmest
Warmest since:
2018
Ties: 1934, 1946, 1966, 1986

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