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 1897

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
December 1897
1-Month		16.4°F
(-8.7°C)		23.0°F
(-5.0°C)		-6.6°F
(-3.7°C)		7th Coolest
Coolest since:
1909
122nd Warmest
Warmest since:
1980
Nov–Dec 1897
2-Month		25.1°F
(-3.8°C)		27.5°F
(-2.5°C)		-2.4°F
(-1.3°C)		25th Coolest
Coolest since:
1895
104th Warmest
Warmest since:
2017
Oct–Dec 1897
3-Month		31.5°F
(-0.3°C)		33.5°F
(0.8°C)		-2.0°F
(-1.1°C)		19th Coolest
Coolest since:
1898
110th Warmest
Warmest since:
1950, 2017
Ties: 1913, 1920, 1948
Sep–Dec 1897
4-Month		38.1°F
(3.4°C)		39.2°F
(4.0°C)		-1.1°F
(-0.6°C)		30th Coolest
Coolest since:
1898, 1912
99th Warmest
Warmest to Date
2021
Ties: 1902, 1918, 1982, 1984
Aug–Dec 1897
5-Month		43.3°F
(6.3°C)		44.3°F
(6.8°C)		-1.0°F
(-0.5°C)		28th Coolest
Coolest since:
1912
101st Warmest
Warmest to Date
2021
Ties: 1902, 1927
Jul–Dec 1897
6-Month		46.8°F
(8.2°C)		48.1°F
(8.9°C)		-1.3°F
(-0.7°C)		22nd Coolest
Coolest since:
1912
107th Warmest
Warmest since:
2021
Ties: 1918, 1928, 1951
Jun–Dec 1897
7-Month		48.7°F
(9.3°C)		49.9°F
(9.9°C)		-1.2°F
(-0.6°C)		23rd Coolest
Coolest since:
1912
106th Warmest
Warmest since:
2021
Ties: 1903, 1907
May–Dec 1897
8-Month		49.5°F
(9.7°C)		50.0°F
(10.0°C)		-0.5°F
(-0.3°C)		39th Coolest
Coolest since:
1912
90th Warmest
Warmest to Date
2021
Ties: 1929
Apr–Dec 1897
9-Month		48.6°F
(9.2°C)		49.1°F
(9.5°C)		-0.5°F
(-0.3°C)		41st Coolest
Coolest since:
1912
88th Warmest
Warmest to Date
2021
Ties: 1917, 1941, 1972, 1978
Mar–Dec 1897
10-Month		46.4°F
(8.0°C)		47.5°F
(8.6°C)		-1.1°F
(-0.6°C)		21st Coolest
Coolest since:
1912
108th Warmest
Warmest since:
2012
Ties: 1902, 1905, 1929, 1930, 1964, 1970
Feb–Dec 1897
11-Month		44.2°F
(6.8°C)		45.5°F
(7.5°C)		-1.3°F
(-0.7°C)		17th Coolest
Coolest since:
1912
112th Warmest
Warmest since:
2017
Ties: 1905, 1924
Jan–Dec 1897
12-Month		42.2°F
(5.7°C)		43.4°F
(6.3°C)		-1.2°F
(-0.6°C)		20th Coolest
Coolest since:
1895, 1912
109th Warmest
Warmest since:
2012
Ties: 1919, 1930, 1984
Jul 1896–Dec 1897
18-Month		43.8°F
(6.6°C)		45.0°F
(7.2°C)		-1.2°F
(-0.6°C)		17th Coolest
Coolest since:
1912
111th Warmest
Warmest to Date
1934
Ties: 1952
Jan 1896–Dec 1897
24-Month		42.5°F
(5.8°C)		43.4°F
(6.3°C)		-0.9°F
(-0.5°C)		18th Coolest
Coolest since:
1913
110th Warmest
Warmest to Date
2018
Ties: 1919, 1933, 1952, 1965, 1974
Jan 1895–Dec 1897
36-Month		41.9°F
(5.5°C)		43.4°F
(6.3°C)		-1.5°F
(-0.8°C)		4th Coolest
Coolest to Date
1899, 1913
123rd Warmest
Warmest to Date
2017
Ties: 1917

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