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 1901

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 1901
1-Month
24.2°F
(-4.3°C)
23.0°F
(-5.0°C)
1.2°F
(0.7°C)
81st Coolest
Coolest since:
1909
48th Warmest
Warmest since:
1980
Ties: 1936, 1944, 2019
Nov–Dec 1901
2-Month
29.6°F
(-1.3°C)
27.5°F
(-2.5°C)
2.1°F
(1.2°C)
98th Coolest
Coolest since:
1895
31st Warmest
Warmest to Date
2017
Ties: 2005, 2006
Oct–Dec 1901
3-Month
35.2°F
(1.8°C)
33.5°F
(0.8°C)
1.7°F
(1.0°C)
98th Coolest
Coolest since:
1898
31st Warmest
Warmest to Date
1950, 2017
Ties: 2015
Sep–Dec 1901
4-Month
40.1°F
(4.5°C)
39.2°F
(4.0°C)
0.9°F
(0.5°C)
82nd Coolest
Coolest since:
1898, 1912
47th Warmest
Warmest to Date
2021
Aug–Dec 1901
5-Month
45.3°F
(7.4°C)
44.3°F
(6.8°C)
1.0°F
(0.6°C)
87th Coolest
Coolest since:
1912
42nd Warmest
Warmest to Date
2021
Ties: 1944, 1953, 1994
Jul–Dec 1901
6-Month
49.3°F
(9.6°C)
48.1°F
(8.9°C)
1.2°F
(0.7°C)
90th Coolest
Coolest since:
1912
39th Warmest
Warmest to Date
2021
Ties: 1994, 2002
Jun–Dec 1901
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 to Date
2021
Ties: 1942, 1966, 1990
May–Dec 1901
8-Month
51.0°F
(10.6°C)
50.0°F
(10.0°C)
1.0°F
(0.6°C)
88th Coolest
Coolest since:
1912
41st Warmest
Warmest to Date
2021
Ties: 1960, 1966
Apr–Dec 1901
9-Month
49.9°F
(9.9°C)
49.1°F
(9.5°C)
0.8°F
(0.4°C)
84th Coolest
Coolest since:
1912
45th Warmest
Warmest to Date
2021
Ties: 1966, 2019
Mar–Dec 1901
10-Month
48.0°F
(8.9°C)
47.5°F
(8.6°C)
0.5°F
(0.3°C)
73rd Coolest
Coolest since:
1912
56th Warmest
Warmest to Date
2012
Ties: 1997
Feb–Dec 1901
11-Month
46.0°F
(7.8°C)
45.5°F
(7.5°C)
0.5°F
(0.3°C)
79th Coolest
Coolest since:
1912
50th Warmest
Warmest to Date
2017
Ties: 2019
Jan–Dec 1901
12-Month
44.0°F
(6.7°C)
43.4°F
(6.3°C)
0.6°F
(0.4°C)
80th Coolest
Coolest since:
1895, 1912
49th Warmest
Warmest since:
2012
Ties: 1907, 1926, 1972, 1997, 2019
Jul 1900–Dec 1901
18-Month
45.2°F
(7.3°C)
45.0°F
(7.2°C)
0.2°F
(0.1°C)
61st Coolest
Coolest since:
1912
67th Warmest
Warmest to Date
1934
Ties: 1907, 1926, 1941, 1966, 1982, 1991
Jan 1900–Dec 1901
24-Month
44.1°F
(6.7°C)
43.4°F
(6.3°C)
0.7°F
(0.4°C)
80th Coolest
Coolest since:
1913
48th Warmest
Warmest to Date
2018
Ties: 2009
Jan 1899–Dec 1901
36-Month
43.3°F
(6.3°C)
43.4°F
(6.3°C)
-0.1°F
(0.0°C)
51st Coolest
Coolest since:
1899, 1913
76th Warmest
Warmest to Date
2017
Ties: 1946, 1971
Jan 1898–Dec 1901
48-Month
42.8°F
(6.0°C)
43.4°F
(6.3°C)
-0.6°F
(-0.3°C)
27th Coolest
Coolest since:
1898
99th Warmest
Warmest to Date
2018
Ties: 1904, 1922, 1926, 1952
Jan 1897–Dec 1901
60-Month
42.7°F
(5.9°C)
43.4°F
(6.3°C)
-0.7°F
(-0.4°C)
19th Coolest
Coolest since:
1899
106th Warmest
Warmest to Date
2018
Ties: 1905, 1907, 1908, 1926, 1931

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