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 1911

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Warmest/Coolest
Since		Record
April 1911
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, 1971, 1993
Mar–Apr 1911
2-Month		38.7°F
(3.7°C)		37.3°F
(2.9°C)		1.4°F
(0.8°C)		81st Coolest
Coolest since:
1917
49th Warmest
Warmest since:
1934, 1992
Ties: 1960, 1967, 2009
Feb–Apr 1911
3-Month		33.9°F
(1.1°C)		33.4°F
(0.8°C)		0.5°F
(0.3°C)		74th Coolest
Coolest since:
1903
56th Warmest
Warmest since:
1934
Ties: 1988
Jan–Apr 1911
4-Month		32.2°F
(0.1°C)		30.3°F
(-0.9°C)		1.9°F
(1.0°C)		100th Coolest
Coolest since:
1917
30th Warmest
Warmest since:
1934
Ties: 1940, 2020, 2021
Dec 1910–Apr 1911
5-Month		30.8°F
(-0.7°C)		28.8°F
(-1.8°C)		2.0°F
(1.1°C)		98th Coolest
Coolest since:
1917
31st Warmest
Warmest since:
1934
Nov 1910–Apr 1911
6-Month		31.8°F
(-0.1°C)		29.4°F
(-1.4°C)		2.4°F
(1.3°C)		107th Coolest
Coolest since:
1917
22nd Warmest
Warmest since:
1934
Oct 1910–Apr 1911
7-Month		33.7°F
(0.9°C)		31.7°F
(-0.2°C)		2.0°F
(1.1°C)		105th Coolest
Coolest since:
1917
24th Warmest
Warmest since:
1934
Ties: 1951, 2003, 2007, 2021
Sep 1910–Apr 1911
8-Month		36.8°F
(2.7°C)		34.8°F
(1.6°C)		2.0°F
(1.1°C)		107th Coolest
Coolest since:
1917
22nd Warmest
Warmest since:
1934
Ties: 2021
Aug 1910–Apr 1911
9-Month		39.9°F
(4.4°C)		38.1°F
(3.4°C)		1.8°F
(1.0°C)		101st Coolest
Coolest since:
1917
28th Warmest
Warmest since:
1934
Jul 1910–Apr 1911
10-Month		42.6°F
(5.9°C)		41.0°F
(5.0°C)		1.6°F
(0.9°C)		100th Coolest
Coolest since:
1917
29th Warmest
Warmest to Date
1934
Ties: 1959, 2020
Jun 1910–Apr 1911
11-Month		44.4°F
(6.9°C)		42.7°F
(5.9°C)		1.7°F
(1.0°C)		99th Coolest
Coolest since:
1917
30th Warmest
Warmest to Date
1934
Ties: 1992, 2006
May 1910–Apr 1911
12-Month		45.0°F
(7.2°C)		43.4°F
(6.3°C)		1.6°F
(0.9°C)		97th Coolest
Coolest since:
1917
32nd Warmest
Warmest to Date
1934, 2015, 2018
Ties: 1938
Nov 1909–Apr 1911
18-Month		39.5°F
(4.2°C)		38.7°F
(3.7°C)		0.8°F
(0.5°C)		85th Coolest
Coolest since:
1913
43rd Warmest
Warmest to Date
2018
Ties: 1960, 1988, 2020
May 1909–Apr 1911
24-Month		43.9°F
(6.6°C)		43.4°F
(6.3°C)		0.5°F
(0.3°C)		77th Coolest
Coolest since:
1913
51st Warmest
Warmest to Date
2018
Ties: 1964, 1988
May 1908–Apr 1911
36-Month		42.9°F
(6.1°C)		43.4°F
(6.3°C)		-0.5°F
(-0.2°C)		32nd Coolest
Coolest since:
1914
95th Warmest
Warmest since:
2017, 2018, 2019
Ties: 1903, 1908, 1949, 1952, 1976, 1985
May 1907–Apr 1911
48-Month		42.7°F
(5.9°C)		43.4°F
(6.3°C)		-0.7°F
(-0.4°C)		22nd Coolest
Coolest since:
1899, 1915
104th Warmest
Warmest since:
2018
Ties: 1921, 1924, 1952, 1975
May 1906–Apr 1911
60-Month		43.1°F
(6.2°C)		43.4°F
(6.3°C)		-0.3°F
(-0.1°C)		40th Coolest
Coolest since:
1917
85th Warmest
Warmest to Date
2018, 2019
Ties: 1928, 1969

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