Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. 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 1971

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Warmest/Coolest
Since		Record
April 1971
1-Month		41.3°F
(5.2°C)		41.7°F
(5.4°C)		-0.4°F
(-0.2°C)		49th Coolest
Coolest since:
1920
81st Warmest
Warmest since:
1992
Ties: 1897, 1911, 1993
Mar–Apr 1971
2-Month		36.6°F
(2.6°C)		37.3°F
(2.9°C)		-0.7°F
(-0.3°C)		46th Coolest
Coolest since:
1917
84th Warmest
Warmest since:
1934, 1992
Ties: 1898, 1941
Feb–Apr 1971
3-Month		33.2°F
(0.7°C)		33.4°F
(0.8°C)		-0.2°F
(-0.1°C)		49th Coolest
Coolest since:
1903
81st Warmest
Warmest since:
1934
Ties: 1906, 1908
Jan–Apr 1971
4-Month		31.1°F
(-0.5°C)		30.3°F
(-0.9°C)		0.8°F
(0.4°C)		76th Coolest
Coolest since:
1917
54th Warmest
Warmest since:
1934
Ties: 2002
Dec 1970–Apr 1971
5-Month		29.6°F
(-1.3°C)		28.8°F
(-1.8°C)		0.8°F
(0.5°C)		76th Coolest
Coolest since:
1917
53rd Warmest
Warmest since:
1934
Ties: 1904, 1921, 1930, 1967, 1997
Nov 1970–Apr 1971
6-Month		30.3°F
(-0.9°C)		29.4°F
(-1.4°C)		0.9°F
(0.5°C)		80th Coolest
Coolest since:
1917
49th Warmest
Warmest since:
1934
Ties: 1900, 1902, 2001
Oct 1970–Apr 1971
7-Month		31.7°F
(-0.2°C)		31.7°F
(-0.2°C)		0.0°F
(0.0°C)		53rd Coolest
Coolest since:
1917
76th Warmest
Warmest since:
1934
Ties: 1921, 1976, 1983
Sep 1970–Apr 1971
8-Month		34.4°F
(1.3°C)		34.8°F
(1.6°C)		-0.4°F
(-0.3°C)		43rd Coolest
Coolest since:
1917
86th Warmest
Warmest since:
1934
Ties: 1915, 1930, 1960
Aug 1970–Apr 1971
9-Month		38.1°F
(3.4°C)		38.1°F
(3.4°C)		0.0°F
(0.0°C)		56th Coolest
Coolest since:
1917
73rd Warmest
Warmest since:
1934
Ties: 1904, 1991
Jul 1970–Apr 1971
10-Month		41.0°F
(5.0°C)		41.0°F
(5.0°C)		0.0°F
(0.0°C)		59th Coolest
Coolest since:
1917
70th Warmest
Warmest since:
1934
Jun 1970–Apr 1971
11-Month		42.7°F
(5.9°C)		42.7°F
(5.9°C)		0.0°F
(0.0°C)		56th Coolest
Coolest since:
1917
73rd Warmest
Warmest since:
1934
Ties: 1926, 1946, 1957, 2010
May 1970–Apr 1971
12-Month		43.5°F
(6.4°C)		43.4°F
(6.3°C)		0.1°F
(0.1°C)		56th Coolest
Coolest since:
1917
73rd Warmest
Warmest since:
1934, 2015, 2018
Ties: 1946, 1960
Nov 1969–Apr 1971
18-Month		39.0°F
(3.9°C)		38.7°F
(3.7°C)		0.3°F
(0.2°C)		60th Coolest
Coolest since:
1913
68th Warmest
Warmest since:
2018
Ties: 1901, 1946
May 1969–Apr 1971
24-Month		43.6°F
(6.4°C)		43.4°F
(6.3°C)		0.2°F
(0.1°C)		59th Coolest
Coolest since:
1913
69th Warmest
Warmest since:
2018
Ties: 1943, 1946, 1962, 1967
May 1968–Apr 1971
36-Month		43.2°F
(6.2°C)		43.4°F
(6.3°C)		-0.2°F
(-0.1°C)		44th Coolest
Coolest since:
1914
83rd Warmest
Warmest since:
2017, 2018, 2019
Ties: 1907, 1951
May 1967–Apr 1971
48-Month		43.1°F
(6.2°C)		43.4°F
(6.3°C)		-0.3°F
(-0.1°C)		37th Coolest
Coolest since:
1899, 1915
89th Warmest
Warmest since:
2018
Ties: 1902, 1907, 1949, 1950, 1951, 1969, 1973, 1977
May 1966–Apr 1971
60-Month		43.4°F
(6.3°C)		43.4°F
(6.3°C)		0.0°F
(0.0°C)		51st Coolest
Coolest since:
1917
74th Warmest
Warmest since:
2018, 2019
Ties: 1946, 1948

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