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, April 1955

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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
April 1955
1-Month
39.1°F
(3.9°C)
41.7°F
(5.4°C)
-2.6°F
(-1.5°C)
21st Coolest
Coolest since:
1920
108th Warmest
Warmest since:
1992
Ties: 1999
Mar–Apr 1955
2-Month
33.9°F
(1.1°C)
37.2°F
(2.9°C)
-3.3°F
(-1.8°C)
9th Coolest
Coolest since:
1917
120th Warmest
Warmest since:
1934, 1992
Ties: 1944
Feb–Apr 1955
3-Month
28.2°F
(-2.1°C)
33.3°F
(0.7°C)
-5.1°F
(-2.8°C)
3rd Coolest
Coolest since:
1903
126th Warmest
Warmest since:
1934
Jan–Apr 1955
4-Month
25.7°F
(-3.5°C)
30.3°F
(-0.9°C)
-4.6°F
(-2.6°C)
5th Coolest
Coolest since:
1917
124th Warmest
Warmest since:
1934
Dec 1954–Apr 1955
5-Month
24.7°F
(-4.1°C)
28.8°F
(-1.8°C)
-4.1°F
(-2.3°C)
7th Coolest
Coolest since:
1917
121st Warmest
Warmest since:
1934
Nov 1954–Apr 1955
6-Month
26.7°F
(-2.9°C)
29.4°F
(-1.4°C)
-2.7°F
(-1.5°C)
13th Coolest
Coolest since:
1917
115th Warmest
Warmest since:
1934
Ties: 1896, 1898, 1920
Oct 1954–Apr 1955
7-Month
29.6°F
(-1.3°C)
31.6°F
(-0.2°C)
-2.0°F
(-1.1°C)
19th Coolest
Coolest since:
1917
109th Warmest
Warmest since:
1934
Sep 1954–Apr 1955
8-Month
33.2°F
(0.7°C)
34.8°F
(1.6°C)
-1.6°F
(-0.9°C)
21st Coolest
Coolest since:
1917
107th Warmest
Warmest since:
1934
Ties: 1919
Aug 1954–Apr 1955
9-Month
36.6°F
(2.6°C)
38.1°F
(3.4°C)
-1.5°F
(-0.8°C)
22nd Coolest
Coolest since:
1917
106th Warmest
Warmest since:
1934
Jul 1954–Apr 1955
10-Month
39.9°F
(4.4°C)
41.0°F
(5.0°C)
-1.1°F
(-0.6°C)
24th Coolest
Coolest since:
1917
104th Warmest
Warmest since:
1934
Ties: 1925, 1969
Jun 1954–Apr 1955
11-Month
41.8°F
(5.4°C)
42.7°F
(5.9°C)
-0.9°F
(-0.5°C)
25th Coolest
Coolest since:
1917
103rd Warmest
Warmest since:
1934
Ties: 1925, 1948, 1962, 1969
May 1954–Apr 1955
12-Month
42.8°F
(6.0°C)
43.4°F
(6.3°C)
-0.6°F
(-0.3°C)
35th Coolest
Coolest since:
1917
93rd Warmest
Warmest since:
1934, 2015, 2018
Ties: 1922, 1948, 1968, 1974
Nov 1953–Apr 1955
18-Month
39.4°F
(4.1°C)
38.7°F
(3.7°C)
0.7°F
(0.4°C)
81st Coolest
Coolest since:
1913
46th Warmest
Warmest since:
2018
Ties: 1902, 1927, 1936, 1944, 1961, 1992, 2011
May 1953–Apr 1955
24-Month
44.0°F
(6.7°C)
43.4°F
(6.3°C)
0.6°F
(0.4°C)
83rd Coolest
Coolest since:
1913
44th Warmest
Warmest since:
2018
Ties: 1934, 1940, 1961, 1983, 2011
May 1952–Apr 1955
36-Month
44.0°F
(6.7°C)
43.4°F
(6.3°C)
0.6°F
(0.4°C)
81st Coolest
Coolest since:
1914
45th Warmest
Warmest since:
2017, 2018, 2019
Ties: 1942, 1956, 1959
May 1951–Apr 1955
48-Month
43.4°F
(6.3°C)
43.4°F
(6.3°C)
0.0°F
(0.0°C)
53rd Coolest
Coolest since:
1899, 1915
72nd Warmest
Warmest since:
2018
Ties: 1945, 1965, 1966, 1970
May 1950–Apr 1955
60-Month
43.4°F
(6.3°C)
43.3°F
(6.3°C)
0.1°F
(0.0°C)
51st Coolest
Coolest since:
1917
73rd Warmest
Warmest since:
2018, 2019
Ties: 1946, 1948, 1971

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