Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. 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 1899

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 1899
1-Month
18.0°F
(-7.8°C)
23.0°F
(-5.0°C)
-5.0°F
(-2.8°C)
19th Coolest
Coolest since:
1909
110th Warmest
Warmest since:
1980
Ties: 1913, 2009
Nov–Dec 1899
2-Month
26.2°F
(-3.2°C)
27.5°F
(-2.5°C)
-1.3°F
(-0.7°C)
38th Coolest
Coolest since:
1895
91st Warmest
Warmest since:
2017
Ties: 1896, 1964, 1991
Oct–Dec 1899
3-Month
31.4°F
(-0.3°C)
33.5°F
(0.8°C)
-2.1°F
(-1.1°C)
18th Coolest
Coolest since:
1898
111th Warmest
Warmest since:
1950, 2017
Sep–Dec 1899
4-Month
37.8°F
(3.2°C)
39.2°F
(4.0°C)
-1.4°F
(-0.8°C)
22nd Coolest
Coolest since:
1898, 1912
107th Warmest
Warmest since:
2021
Ties: 1970
Aug–Dec 1899
5-Month
42.5°F
(5.8°C)
44.3°F
(6.8°C)
-1.8°F
(-1.0°C)
15th Coolest
Coolest since:
1912
114th Warmest
Warmest since:
2021
Ties: 1909, 1932
Jul–Dec 1899
6-Month
46.5°F
(8.1°C)
48.1°F
(8.9°C)
-1.6°F
(-0.8°C)
14th Coolest
Coolest since:
1912
115th Warmest
Warmest since:
2021
Ties: 1971
Jun–Dec 1899
7-Month
48.3°F
(9.1°C)
49.8°F
(9.9°C)
-1.5°F
(-0.8°C)
9th Coolest
Coolest since:
1912
120th Warmest
Warmest since:
2021
Ties: 1905, 1924, 1928, 1932, 1951, 1993
May–Dec 1899
8-Month
48.3°F
(9.1°C)
50.0°F
(10.0°C)
-1.7°F
(-0.9°C)
9th Coolest
Coolest since:
1912
120th Warmest
Warmest since:
2021
Apr–Dec 1899
9-Month
47.7°F
(8.7°C)
49.1°F
(9.5°C)
-1.4°F
(-0.8°C)
11th Coolest
Coolest since:
1912
118th Warmest
Warmest since:
2021
Ties: 1898, 1903, 1924
Mar–Dec 1899
10-Month
46.1°F
(7.8°C)
47.5°F
(8.6°C)
-1.4°F
(-0.8°C)
14th Coolest
Coolest since:
1912
115th Warmest
Warmest since:
2012
Ties: 1932
Feb–Dec 1899
11-Month
43.7°F
(6.5°C)
45.4°F
(7.4°C)
-1.7°F
(-0.9°C)
7th Coolest
Coolest since:
1912
122nd Warmest
Warmest since:
2017
Ties: 1916, 1920
Jan–Dec 1899
12-Month
41.8°F
(5.4°C)
43.5°F
(6.4°C)
-1.7°F
(-1.0°C)
10th Coolest
Coolest since:
1895, 1912
119th Warmest
Warmest since:
2012
Ties: 1920, 1924, 1932, 1973
Jul 1898–Dec 1899
18-Month
43.1°F
(6.2°C)
45.0°F
(7.2°C)
-1.9°F
(-1.0°C)
5th Coolest
Coolest since:
1912
123rd Warmest
Warmest since:
1934
Ties: 1898, 1909
Jan 1898–Dec 1899
24-Month
41.5°F
(5.3°C)
43.4°F
(6.3°C)
-1.9°F
(-1.0°C)
2nd Coolest
Coolest since:
1913
126th Warmest
Warmest since:
2018
Jan 1897–Dec 1899
36-Month
41.7°F
(5.4°C)
43.4°F
(6.3°C)
-1.7°F
(-0.9°C)
1st Coolest
Coolest since:
1899, 1913
126th Warmest
Warmest since:
2017
Ties: 1913
Jan 1896–Dec 1899
48-Month
42.0°F
(5.6°C)
43.4°F
(6.3°C)
-1.4°F
(-0.7°C)
3rd Coolest
Coolest since:
1898
123rd Warmest
Warmest to Date
2018
Ties: 1914
Jan 1895–Dec 1899
60-Month
41.7°F
(5.4°C)
43.4°F
(6.3°C)
-1.7°F
(-0.9°C)
1st Coolest
Coolest since:
1899
124th Warmest
Warmest to Date
2018

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