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 1940

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
December 1940
1-Month		25.0°F
(-3.9°C)		23.0°F
(-5.0°C)		2.0°F
(1.1°C)		93rd Coolest
Coolest since:
1909
36th Warmest
Warmest since:
1980
Ties: 1996, 1999
Nov–Dec 1940
2-Month		26.9°F
(-2.8°C)		27.5°F
(-2.5°C)		-0.6°F
(-0.3°C)		46th Coolest
Coolest since:
1895
83rd Warmest
Warmest since:
2017
Ties: 1982
Oct–Dec 1940
3-Month		33.5°F
(0.8°C)		33.5°F
(0.8°C)		0.0°F
(0.0°C)		65th Coolest
Coolest since:
1898
64th Warmest
Warmest since:
1950, 2017
Ties: 1983, 2002
Sep–Dec 1940
4-Month		39.7°F
(4.3°C)		39.2°F
(4.0°C)		0.5°F
(0.3°C)		77th Coolest
Coolest since:
1898, 1912
52nd Warmest
Warmest since:
2021
Ties: 1959, 1979
Aug–Dec 1940
5-Month		45.0°F
(7.2°C)		44.3°F
(6.8°C)		0.7°F
(0.4°C)		79th Coolest
Coolest since:
1912
50th Warmest
Warmest since:
2021
Ties: 1966
Jul–Dec 1940
6-Month		48.9°F
(9.4°C)		48.1°F
(8.9°C)		0.8°F
(0.5°C)		81st Coolest
Coolest since:
1912
48th Warmest
Warmest since:
2021
Ties: 1983, 2000
Jun–Dec 1940
7-Month		51.0°F
(10.6°C)		49.9°F
(9.9°C)		1.1°F
(0.7°C)		91st Coolest
Coolest since:
1912
38th Warmest
Warmest since:
2021
Ties: 1953, 1954, 2006, 2019
May–Dec 1940
8-Month		51.5°F
(10.8°C)		50.0°F
(10.0°C)		1.5°F
(0.8°C)		102nd Coolest
Coolest since:
1912
27th Warmest
Warmest since:
2021
Ties: 1910, 2000, 2006
Apr–Dec 1940
9-Month		50.6°F
(10.3°C)		49.1°F
(9.5°C)		1.5°F
(0.8°C)		102nd Coolest
Coolest since:
1912
27th Warmest
Warmest since:
2021
Ties: 1996
Mar–Dec 1940
10-Month		49.2°F
(9.6°C)		47.5°F
(8.6°C)		1.7°F
(1.0°C)		107th Coolest
Coolest since:
1912
22nd Warmest
Warmest since:
2012
Ties: 1939
Feb–Dec 1940
11-Month		47.2°F
(8.4°C)		45.5°F
(7.5°C)		1.7°F
(0.9°C)		109th Coolest
Coolest since:
1912
20th Warmest
Warmest since:
2017
Jan–Dec 1940
12-Month		45.1°F
(7.3°C)		43.4°F
(6.3°C)		1.7°F
(1.0°C)		104th Coolest
Coolest since:
1895, 1912
25th Warmest
Warmest since:
2012
Jul 1939–Dec 1940
18-Month		46.8°F
(8.2°C)		45.0°F
(7.2°C)		1.8°F
(1.0°C)		108th Coolest
Coolest since:
1912
20th Warmest
Warmest since:
1934
Ties: 2002, 2006
Jan 1939–Dec 1940
24-Month		44.6°F
(7.0°C)		43.4°F
(6.3°C)		1.2°F
(0.7°C)		97th Coolest
Coolest since:
1913
31st Warmest
Warmest since:
2018
Ties: 1978, 1982, 1989, 1997, 2010
Jan 1938–Dec 1940
36-Month		44.3°F
(6.8°C)		43.4°F
(6.3°C)		0.9°F
(0.5°C)		90th Coolest
Coolest since:
1899, 1913
37th Warmest
Warmest since:
2017
Ties: 1960, 1983, 1987, 2010, 2011
Jan 1937–Dec 1940
48-Month		43.9°F
(6.6°C)		43.4°F
(6.3°C)		0.5°F
(0.3°C)		76th Coolest
Coolest since:
1898
50th Warmest
Warmest since:
2018
Ties: 1934
Jan 1936–Dec 1940
60-Month		44.0°F
(6.7°C)		43.4°F
(6.3°C)		0.6°F
(0.4°C)		84th Coolest
Coolest since:
1899
41st Warmest
Warmest since:
2018
Ties: 1963, 1980, 1982, 1983, 1984

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