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 1990

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
December 1990
1-Month		16.7°F
(-8.5°C)		23.0°F
(-5.0°C)		-6.3°F
(-3.5°C)		8th Coolest
Coolest since:
1909
121st Warmest
Warmest since:
1980
Nov–Dec 1990
2-Month		25.2°F
(-3.8°C)		27.5°F
(-2.5°C)		-2.3°F
(-1.3°C)		26th Coolest
Coolest since:
1895
103rd Warmest
Warmest since:
2017
Ties: 1938, 1945, 1968, 1979
Oct–Dec 1990
3-Month		32.0°F
(0.0°C)		33.5°F
(0.8°C)		-1.5°F
(-0.8°C)		29th Coolest
Coolest since:
1898
100th Warmest
Warmest since:
1950, 2017
Ties: 1993
Sep–Dec 1990
4-Month		39.3°F
(4.1°C)		39.2°F
(4.0°C)		0.1°F
(0.1°C)		59th Coolest
Coolest since:
1898, 1912
70th Warmest
Warmest since:
2021
Ties: 1926, 1935, 1947, 1991
Aug–Dec 1990
5-Month		44.5°F
(6.9°C)		44.3°F
(6.8°C)		0.2°F
(0.1°C)		61st Coolest
Coolest since:
1912
68th Warmest
Warmest since:
2021
Ties: 1967, 2013
Jul–Dec 1990
6-Month		48.4°F
(9.1°C)		48.1°F
(8.9°C)		0.3°F
(0.2°C)		67th Coolest
Coolest since:
1912
62nd Warmest
Warmest since:
2021
Ties: 1965, 1979, 1991
Jun–Dec 1990
7-Month		50.6°F
(10.3°C)		49.9°F
(9.9°C)		0.7°F
(0.4°C)		78th Coolest
Coolest since:
1912
51st Warmest
Warmest since:
2021
Ties: 1901, 1942, 1966
May–Dec 1990
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, 1955, 1974, 1997
Apr–Dec 1990
9-Month		50.1°F
(10.1°C)		49.1°F
(9.5°C)		1.0°F
(0.6°C)		90th Coolest
Coolest since:
1912
39th Warmest
Warmest since:
2021
Ties: 1960, 1987, 2013
Mar–Dec 1990
10-Month		48.8°F
(9.3°C)		47.5°F
(8.6°C)		1.3°F
(0.7°C)		99th Coolest
Coolest since:
1912
30th Warmest
Warmest since:
2012
Ties: 2005
Feb–Dec 1990
11-Month		46.7°F
(8.2°C)		45.5°F
(7.5°C)		1.2°F
(0.7°C)		95th Coolest
Coolest since:
1912
34th Warmest
Warmest since:
2017
Ties: 1936, 1943
Jan–Dec 1990
12-Month		44.8°F
(7.1°C)		43.4°F
(6.3°C)		1.4°F
(0.8°C)		98th Coolest
Coolest since:
1895, 1912
31st Warmest
Warmest since:
2012
Ties: 1963, 1980
Jul 1989–Dec 1990
18-Month		46.4°F
(8.0°C)		45.0°F
(7.2°C)		1.4°F
(0.8°C)		102nd Coolest
Coolest since:
1912
26th Warmest
Warmest since:
1934
Ties: 1989, 2009, 2013
Jan 1989–Dec 1990
24-Month		44.8°F
(7.1°C)		43.4°F
(6.3°C)		1.4°F
(0.8°C)		100th Coolest
Coolest since:
1913
28th Warmest
Warmest since:
2018
Ties: 1987
Jan 1988–Dec 1990
36-Month		44.7°F
(7.1°C)		43.4°F
(6.3°C)		1.3°F
(0.8°C)		101st Coolest
Coolest since:
1899, 1913
26th Warmest
Warmest since:
2017
Ties: 1935, 1982, 1988, 1998
Jan 1987–Dec 1990
48-Month		44.6°F
(7.0°C)		43.4°F
(6.3°C)		1.2°F
(0.7°C)		97th Coolest
Coolest since:
1898
29th Warmest
Warmest since:
2018
Ties: 1995
Jan 1986–Dec 1990
60-Month		44.7°F
(7.1°C)		43.4°F
(6.3°C)		1.3°F
(0.8°C)		99th Coolest
Coolest since:
1899
26th Warmest
Warmest to Date
2018

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