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 1899

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
April 1899
1-Month
42.4°F
(5.8°C)
41.7°F
(5.4°C)
0.7°F
(0.4°C)
70th Coolest
Coolest since:
1920
59th Warmest
Warmest since:
1992
Ties: 1902, 1913, 1916, 1938, 1948, 2014
Mar–Apr 1899
2-Month
37.1°F
(2.8°C)
37.2°F
(2.9°C)
-0.1°F
(-0.1°C)
54th Coolest
Coolest since:
1917
75th Warmest
Warmest to Date
1934, 1992
Ties: 1919
Feb–Apr 1899
3-Month
31.5°F
(-0.3°C)
33.3°F
(0.7°C)
-1.8°F
(-1.0°C)
25th Coolest
Coolest since:
1903
104th Warmest
Warmest since:
1934
Jan–Apr 1899
4-Month
28.7°F
(-1.8°C)
30.3°F
(-0.9°C)
-1.6°F
(-0.9°C)
29th Coolest
Coolest since:
1917
100th Warmest
Warmest since:
1934
Ties: 1939
Dec 1898–Apr 1899
5-Month
25.9°F
(-3.4°C)
28.8°F
(-1.8°C)
-2.9°F
(-1.6°C)
15th Coolest
Coolest since:
1917
113th Warmest
Warmest since:
1934
Nov 1898–Apr 1899
6-Month
26.4°F
(-3.1°C)
29.3°F
(-1.5°C)
-2.9°F
(-1.6°C)
11th Coolest
Coolest since:
1917
117th Warmest
Warmest since:
1934
Ties: 1913
Oct 1898–Apr 1899
7-Month
28.6°F
(-1.9°C)
31.7°F
(-0.2°C)
-3.1°F
(-1.7°C)
8th Coolest
Coolest since:
1917
120th Warmest
Warmest since:
1934
Ties: 1913
Sep 1898–Apr 1899
8-Month
31.9°F
(-0.1°C)
34.7°F
(1.5°C)
-2.8°F
(-1.6°C)
6th Coolest
Coolest since:
1917
122nd Warmest
Warmest since:
1934
Ties: 1929, 1952
Aug 1898–Apr 1899
9-Month
35.8°F
(2.1°C)
38.1°F
(3.4°C)
-2.3°F
(-1.3°C)
8th Coolest
Coolest since:
1917
120th Warmest
Warmest since:
1934
Ties: 1909, 1912
Jul 1898–Apr 1899
10-Month
38.9°F
(3.8°C)
40.9°F
(4.9°C)
-2.0°F
(-1.1°C)
9th Coolest
Coolest since:
1917
119th Warmest
Warmest since:
1934
Ties: 1896, 1909
Jun 1898–Apr 1899
11-Month
40.9°F
(4.9°C)
42.7°F
(5.9°C)
-1.8°F
(-1.0°C)
11th Coolest
Coolest since:
1917
117th Warmest
Warmest since:
1934
May 1898–Apr 1899
12-Month
41.6°F
(5.3°C)
43.4°F
(6.3°C)
-1.8°F
(-1.0°C)
11th Coolest
Coolest since:
1917
117th Warmest
Warmest since:
1934, 2015, 2018
Nov 1897–Apr 1899
18-Month
36.6°F
(2.6°C)
38.7°F
(3.7°C)
-2.1°F
(-1.1°C)
4th Coolest
Coolest since:
1913
123rd Warmest
Warmest since:
2018
May 1897–Apr 1899
24-Month
41.9°F
(5.5°C)
43.4°F
(6.3°C)
-1.5°F
(-0.8°C)
9th Coolest
Coolest since:
1913
118th Warmest
Warmest since:
2018
May 1896–Apr 1899
36-Month
42.0°F
(5.6°C)
43.4°F
(6.3°C)
-1.4°F
(-0.7°C)
7th Coolest
Coolest since:
1914
119th Warmest
Warmest to Date
2017, 2018, 2019
Ties: 1910, 1915
May 1895–Apr 1899
48-Month
41.8°F
(5.4°C)
43.4°F
(6.3°C)
-1.6°F
(-0.9°C)
1st Coolest
Coolest since:
1899, 1915
124th Warmest
Warmest to Date
2018
Ties: 1915

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