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 1930

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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 1930
1-Month
46.7°F
(8.2°C)
41.7°F
(5.4°C)
5.0°F
(2.8°C)
123rd Coolest
Coolest since:
1920
6th Warmest
Warmest to Date
1992
Ties: 2012
Mar–Apr 1930
2-Month
39.4°F
(4.1°C)
37.3°F
(2.9°C)
2.1°F
(1.2°C)
101st Coolest
Coolest since:
1917
28th Warmest
Warmest since:
1934, 1992
Feb–Apr 1930
3-Month
35.9°F
(2.2°C)
33.4°F
(0.8°C)
2.5°F
(1.4°C)
107th Coolest
Coolest since:
1903
22nd Warmest
Warmest since:
1934
Ties: 1904, 1999
Jan–Apr 1930
4-Month
30.2°F
(-1.0°C)
30.3°F
(-0.9°C)
-0.1°F
(-0.1°C)
50th Coolest
Coolest since:
1917
79th Warmest
Warmest since:
1934
Ties: 1915, 1963, 1991
Dec 1929–Apr 1930
5-Month
29.6°F
(-1.3°C)
28.8°F
(-1.8°C)
0.8°F
(0.5°C)
75th Coolest
Coolest since:
1917
53rd Warmest
Warmest since:
1934
Ties: 1904, 1921, 1967, 1971, 1997
Nov 1929–Apr 1930
6-Month
29.3°F
(-1.5°C)
29.4°F
(-1.4°C)
-0.1°F
(-0.1°C)
51st Coolest
Coolest since:
1917
77th Warmest
Warmest since:
1934
Ties: 1960
Oct 1929–Apr 1930
7-Month
31.6°F
(-0.2°C)
31.7°F
(-0.2°C)
-0.1°F
(0.0°C)
50th Coolest
Coolest since:
1917
78th Warmest
Warmest since:
1934
Ties: 1993
Sep 1929–Apr 1930
8-Month
34.4°F
(1.3°C)
34.7°F
(1.5°C)
-0.3°F
(-0.2°C)
42nd Coolest
Coolest since:
1917
86th Warmest
Warmest since:
1934
Ties: 1915, 1960, 1971
Aug 1929–Apr 1930
9-Month
37.9°F
(3.3°C)
38.1°F
(3.4°C)
-0.2°F
(-0.1°C)
52nd Coolest
Coolest since:
1917
76th Warmest
Warmest since:
1934
Jul 1929–Apr 1930
10-Month
40.8°F
(4.9°C)
41.0°F
(5.0°C)
-0.2°F
(-0.1°C)
50th Coolest
Coolest since:
1917
78th Warmest
Warmest since:
1934
Ties: 1900, 1905, 1928, 1960, 1976
Jun 1929–Apr 1930
11-Month
42.5°F
(5.8°C)
42.8°F
(6.0°C)
-0.3°F
(-0.2°C)
49th Coolest
Coolest since:
1917
79th Warmest
Warmest since:
1934
Ties: 1900, 1901, 1923, 1928
May 1929–Apr 1930
12-Month
43.1°F
(6.2°C)
43.5°F
(6.4°C)
-0.4°F
(-0.2°C)
47th Coolest
Coolest since:
1917
81st Warmest
Warmest since:
1934, 2015, 2018
Ties: 1905, 1923, 1985
Nov 1928–Apr 1930
18-Month
37.2°F
(2.9°C)
38.7°F
(3.7°C)
-1.5°F
(-0.8°C)
11th Coolest
Coolest since:
1913
116th Warmest
Warmest since:
2018
Ties: 1914, 1920, 1949
May 1928–Apr 1930
24-Month
42.2°F
(5.7°C)
43.5°F
(6.4°C)
-1.3°F
(-0.7°C)
13th Coolest
Coolest since:
1913
114th Warmest
Warmest since:
2018
Ties: 1929
May 1927–Apr 1930
36-Month
42.5°F
(5.8°C)
43.4°F
(6.3°C)
-0.9°F
(-0.5°C)
15th Coolest
Coolest since:
1914
111th Warmest
Warmest since:
2017, 2018, 2019
Ties: 1909, 1921
May 1926–Apr 1930
48-Month
42.8°F
(6.0°C)
43.3°F
(6.3°C)
-0.5°F
(-0.3°C)
27th Coolest
Coolest since:
1899, 1915
98th Warmest
Warmest since:
2018
Ties: 1923, 1926, 1974
May 1925–Apr 1930
60-Month
43.0°F
(6.1°C)
43.3°F
(6.3°C)
-0.3°F
(-0.2°C)
34th Coolest
Coolest since:
1917
90th Warmest
Warmest since:
2018, 2019
Ties: 1905, 1908, 1927, 1953, 1974

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