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 1931

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Warmest/Coolest
Since		Record
April 1931
1-Month		42.7°F
(5.9°C)		41.7°F
(5.4°C)		1.0°F
(0.5°C)		77th Coolest
Coolest since:
1920
53rd Warmest
Warmest since:
1992
Mar–Apr 1931
2-Month		36.8°F
(2.7°C)		37.3°F
(2.9°C)		-0.5°F
(-0.2°C)		50th Coolest
Coolest since:
1917
80th Warmest
Warmest since:
1934, 1992
Ties: 1982
Feb–Apr 1931
3-Month		34.5°F
(1.4°C)		33.4°F
(0.8°C)		1.1°F
(0.6°C)		84th Coolest
Coolest since:
1903
46th Warmest
Warmest since:
1934
Ties: 1900
Jan–Apr 1931
4-Month		30.9°F
(-0.6°C)		30.3°F
(-0.9°C)		0.6°F
(0.3°C)		70th Coolest
Coolest since:
1917
60th Warmest
Warmest since:
1934
Ties: 1936, 1945, 2010
Dec 1930–Apr 1931
5-Month		28.2°F
(-2.1°C)		28.8°F
(-1.8°C)		-0.6°F
(-0.3°C)		42nd Coolest
Coolest since:
1917
87th Warmest
Warmest since:
1934
Ties: 1965, 1966, 1985
Nov 1930–Apr 1931
6-Month		28.2°F
(-2.1°C)		29.4°F
(-1.4°C)		-1.2°F
(-0.7°C)		32nd Coolest
Coolest since:
1917
97th Warmest
Warmest since:
1934
Ties: 1968
Oct 1930–Apr 1931
7-Month		30.4°F
(-0.9°C)		31.7°F
(-0.2°C)		-1.3°F
(-0.7°C)		28th Coolest
Coolest since:
1917
101st Warmest
Warmest since:
1934
Sep 1930–Apr 1931
8-Month		33.5°F
(0.8°C)		34.8°F
(1.6°C)		-1.3°F
(-0.8°C)		26th Coolest
Coolest since:
1917
103rd Warmest
Warmest since:
1934
Aug 1930–Apr 1931
9-Month		37.0°F
(2.8°C)		38.1°F
(3.4°C)		-1.1°F
(-0.6°C)		24th Coolest
Coolest since:
1917
105th Warmest
Warmest since:
1934
Ties: 1906, 1925, 1969
Jul 1930–Apr 1931
10-Month		40.0°F
(4.4°C)		41.0°F
(5.0°C)		-1.0°F
(-0.6°C)		27th Coolest
Coolest since:
1917
102nd Warmest
Warmest since:
1934
Ties: 1914
Jun 1930–Apr 1931
11-Month		41.9°F
(5.5°C)		42.7°F
(5.9°C)		-0.8°F
(-0.4°C)		30th Coolest
Coolest since:
1917
99th Warmest
Warmest since:
1934
Ties: 1908
May 1930–Apr 1931
12-Month		42.4°F
(5.8°C)		43.4°F
(6.3°C)		-1.0°F
(-0.5°C)		22nd Coolest
Coolest since:
1917
107th Warmest
Warmest since:
1934, 2015, 2018
Ties: 1932, 1942, 1969
Nov 1929–Apr 1931
18-Month		38.0°F
(3.3°C)		38.7°F
(3.7°C)		-0.7°F
(-0.4°C)		32nd Coolest
Coolest since:
1913
96th Warmest
Warmest since:
2018
Ties: 1923, 1942, 1953, 1966
May 1929–Apr 1931
24-Month		42.7°F
(5.9°C)		43.4°F
(6.3°C)		-0.7°F
(-0.4°C)		26th Coolest
Coolest since:
1913
102nd Warmest
Warmest since:
2018
Ties: 1903, 1916, 1953, 1985
May 1928–Apr 1931
36-Month		42.2°F
(5.7°C)		43.4°F
(6.3°C)		-1.2°F
(-0.6°C)		10th Coolest
Coolest since:
1914
117th Warmest
Warmest since:
2017, 2018, 2019
Ties: 1913
May 1927–Apr 1931
48-Month		42.5°F
(5.8°C)		43.4°F
(6.3°C)		-0.9°F
(-0.5°C)		15th Coolest
Coolest since:
1899, 1915
111th Warmest
Warmest since:
2018
Ties: 1901, 1912, 1976
May 1926–Apr 1931
60-Month		42.8°F
(6.0°C)		43.4°F
(6.3°C)		-0.6°F
(-0.3°C)		25th Coolest
Coolest since:
1917
100th Warmest
Warmest since:
2018, 2019
Ties: 1907, 1926, 1977

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