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 2018

View Period (Months):
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  • Record Coolest
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  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 2018
1-Month
23.3°F
(-4.8°C)
23.0°F
(-5.0°C)
0.3°F
(0.2°C)
59th Coolest
Coolest since:
1909
70th Warmest
Warmest since:
1980
Nov–Dec 2018
2-Month
27.2°F
(-2.7°C)
27.4°F
(-2.6°C)
-0.2°F
(-0.1°C)
51st Coolest
Coolest since:
1895
78th Warmest
Warmest since:
2017
Ties: 1903, 1927, 1935, 2015
Oct–Dec 2018
3-Month
33.0°F
(0.6°C)
33.5°F
(0.8°C)
-0.5°F
(-0.2°C)
48th Coolest
Coolest since:
1898
81st Warmest
Warmest since:
1950, 2017
Ties: 1925, 1985, 2019
Sep–Dec 2018
4-Month
40.2°F
(4.6°C)
39.2°F
(4.0°C)
1.0°F
(0.6°C)
86th Coolest
Coolest since:
1898, 1912
43rd Warmest
Warmest since:
2021
Ties: 1960, 1987, 2004
Aug–Dec 2018
5-Month
45.6°F
(7.6°C)
44.3°F
(6.8°C)
1.3°F
(0.8°C)
94th Coolest
Coolest since:
1912
35th Warmest
Warmest since:
2021
Ties: 1942, 1988, 2019
Jul–Dec 2018
6-Month
49.9°F
(9.9°C)
48.1°F
(8.9°C)
1.8°F
(1.0°C)
105th Coolest
Coolest since:
1912
24th Warmest
Warmest since:
2021
Ties: 1934
Jun–Dec 2018
7-Month
52.1°F
(11.2°C)
49.8°F
(9.9°C)
2.3°F
(1.3°C)
118th Coolest
Coolest since:
1912
11th Warmest
Warmest since:
2021
Ties: 2010, 2014, 2022
May–Dec 2018
8-Month
52.6°F
(11.4°C)
50.0°F
(10.0°C)
2.6°F
(1.4°C)
124th Coolest
Coolest since:
1912
5th Warmest
Warmest since:
2021
Ties: 2001, 2003, 2016
Apr–Dec 2018
9-Month
51.8°F
(11.0°C)
49.1°F
(9.5°C)
2.7°F
(1.5°C)
125th Coolest
Coolest since:
1912
4th Warmest
Warmest since:
2021
Ties: 2020
Mar–Dec 2018
10-Month
50.2°F
(10.1°C)
47.4°F
(8.6°C)
2.8°F
(1.5°C)
122nd Coolest
Coolest since:
1912
7th Warmest
Warmest since:
2012
Ties: 2001, 2016
Feb–Dec 2018
11-Month
48.3°F
(9.1°C)
45.5°F
(7.5°C)
2.8°F
(1.6°C)
122nd Coolest
Coolest since:
1912
7th Warmest
Warmest since:
2017
Ties: 2016
Jan–Dec 2018
12-Month
46.6°F
(8.1°C)
43.4°F
(6.3°C)
3.2°F
(1.8°C)
123rd Coolest
Coolest since:
1895, 1912
6th Warmest
Warmest since:
2012
Jul 2017–Dec 2018
18-Month
48.2°F
(9.0°C)
45.0°F
(7.2°C)
3.2°F
(1.8°C)
126th Coolest
Coolest since:
1912
2nd Warmest
Warmest since:
1934
Ties: 2017
Jan 2017–Dec 2018
24-Month
46.9°F
(8.3°C)
43.5°F
(6.4°C)
3.4°F
(1.9°C)
127th Coolest
Coolest since:
1913
1st Warmest
Warmest to Date
2018
Jan 2016–Dec 2018
36-Month
46.6°F
(8.1°C)
43.4°F
(6.3°C)
3.2°F
(1.8°C)
125th Coolest
Coolest since:
1899, 1913
2nd Warmest
Warmest since:
2017
Jan 2015–Dec 2018
48-Month
46.6°F
(8.1°C)
43.3°F
(6.3°C)
3.3°F
(1.8°C)
125th Coolest
Coolest since:
1898
1st Warmest
Warmest to Date
2018
Jan 2014–Dec 2018
60-Month
46.5°F
(8.1°C)
43.4°F
(6.3°C)
3.1°F
(1.8°C)
124th Coolest
Coolest since:
1899
1st Warmest
Warmest to Date
2018

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