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 1989

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
December 1989
1-Month		24.3°F
(-4.3°C)		23.0°F
(-5.0°C)		1.3°F
(0.7°C)		82nd Coolest
Coolest since:
1909
47th Warmest
Warmest since:
1980
Nov–Dec 1989
2-Month		29.7°F
(-1.3°C)		27.5°F
(-2.5°C)		2.2°F
(1.2°C)		102nd Coolest
Coolest since:
1895
27th Warmest
Warmest since:
2017
Ties: 1906, 1946, 2019
Oct–Dec 1989
3-Month		35.1°F
(1.7°C)		33.5°F
(0.8°C)		1.6°F
(0.9°C)		96th Coolest
Coolest since:
1898
33rd Warmest
Warmest since:
1950, 2017
Ties: 1943
Sep–Dec 1989
4-Month		40.8°F
(4.9°C)		39.2°F
(4.0°C)		1.6°F
(0.9°C)		99th Coolest
Coolest since:
1898, 1912
30th Warmest
Warmest since:
2021
Aug–Dec 1989
5-Month		45.5°F
(7.5°C)		44.3°F
(6.8°C)		1.2°F
(0.7°C)		90th Coolest
Coolest since:
1912
39th Warmest
Warmest since:
2021
Jul–Dec 1989
6-Month		49.5°F
(9.7°C)		48.1°F
(8.9°C)		1.4°F
(0.8°C)		96th Coolest
Coolest since:
1912
33rd Warmest
Warmest since:
2021
Ties: 1950, 2011, 2019
Jun–Dec 1989
7-Month		51.1°F
(10.6°C)		49.9°F
(9.9°C)		1.2°F
(0.7°C)		95th Coolest
Coolest since:
1912
34th Warmest
Warmest since:
2021
Ties: 2005, 2011, 2013
May–Dec 1989
8-Month		51.3°F
(10.7°C)		50.0°F
(10.0°C)		1.3°F
(0.7°C)		94th Coolest
Coolest since:
1912
35th Warmest
Warmest since:
2021
Ties: 2005, 2013
Apr–Dec 1989
9-Month		50.9°F
(10.5°C)		49.1°F
(9.5°C)		1.8°F
(1.0°C)		111th Coolest
Coolest since:
1912
18th Warmest
Warmest since:
2021
Ties: 1963, 1988, 2015, 2022
Mar–Dec 1989
10-Month		49.6°F
(9.8°C)		47.5°F
(8.6°C)		2.1°F
(1.2°C)		115th Coolest
Coolest since:
1912
14th Warmest
Warmest since:
2012
Ties: 1981, 2014
Feb–Dec 1989
11-Month		47.1°F
(8.4°C)		45.5°F
(7.5°C)		1.6°F
(0.9°C)		108th Coolest
Coolest since:
1912
21st Warmest
Warmest since:
2017
Ties: 1910, 1958, 2022
Jan–Dec 1989
12-Month		44.7°F
(7.1°C)		43.4°F
(6.3°C)		1.3°F
(0.8°C)		95th Coolest
Coolest since:
1895, 1912
34th Warmest
Warmest since:
2012
Ties: 1910, 1921, 1992, 2010
Jul 1988–Dec 1989
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: 1990, 2009, 2013
Jan 1988–Dec 1989
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: 1940, 1978, 1982, 1997, 2010
Jan 1987–Dec 1989
36-Month		44.5°F
(6.9°C)		43.4°F
(6.3°C)		1.1°F
(0.6°C)		95th Coolest
Coolest since:
1899, 1913
32nd Warmest
Warmest since:
2017
Ties: 1981, 1994
Jan 1986–Dec 1989
48-Month		44.7°F
(7.1°C)		43.4°F
(6.3°C)		1.3°F
(0.8°C)		100th Coolest
Coolest since:
1898
26th Warmest
Warmest since:
2018
Ties: 1936, 2010
Jan 1985–Dec 1989
60-Month		44.4°F
(6.9°C)		43.4°F
(6.3°C)		1.0°F
(0.6°C)		94th Coolest
Coolest since:
1899
31st Warmest
Warmest since:
2018
Ties: 1938, 1991, 1994, 1995

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