Regional Rankings

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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.

California River Basin

Average Temperature Rankings, May 1938

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1938 1-Month	61.1°F (16.2°C)	60.7°F (15.9°C)	0.4°F (0.3°C)	59th Coolest	Coolest since: 1935	1977
	61.1°F (16.2°C)	60.7°F (15.9°C)	0.4°F (0.3°C)	70th Warmest	Warmest since: 1937	2001
	Ties: 1922, 1923, 1978
Apr–May 1938 2-Month	57.4°F (14.1°C)	57.4°F (14.1°C)	0.0°F (0.0°C)	61st Coolest	Coolest since: 1935	1967
	57.4°F (14.1°C)	57.4°F (14.1°C)	0.0°F (0.0°C)	68th Warmest	Warmest since: 1937	1992
	Ties: 1960
Mar–May 1938 3-Month	53.4°F (11.9°C)	54.5°F (12.5°C)	-1.1°F (-0.6°C)	36th Coolest	Coolest since: 1935	1917
	53.4°F (11.9°C)	54.5°F (12.5°C)	-1.1°F (-0.6°C)	93rd Warmest	Warmest since: 1937	1934
	Ties: 1907, 1921, 1929, 1995
Feb–May 1938 4-Month	50.9°F (10.5°C)	52.2°F (11.2°C)	-1.3°F (-0.7°C)	25th Coolest	Coolest since: 1933	1917
	50.9°F (10.5°C)	52.2°F (11.2°C)	-1.3°F (-0.7°C)	104th Warmest	Warmest since: 1937	1934
	Ties: 1899, 1920, 1949, 1956, 2010
Jan–May 1938 5-Month	49.6°F (9.8°C)	50.2°F (10.1°C)	-0.6°F (-0.3°C)	36th Coolest	Coolest since: 1937	1917
	49.6°F (9.8°C)	50.2°F (10.1°C)	-0.6°F (-0.3°C)	93rd Warmest	Warmest since: 1936	2015
	Ties: 1901, 1920, 1923, 1956, 1982
Dec 1937–May 1938 6-Month	49.1°F (9.5°C)	49.1°F (9.5°C)	0.0°F (0.0°C)	60th Coolest	Coolest since: 1937	1917
	49.1°F (9.5°C)	49.1°F (9.5°C)	0.0°F (0.0°C)	68th Warmest	Warmest since: 1936	2015
	Ties: 1910, 2008
Nov 1937–May 1938 7-Month	49.4°F (9.7°C)	49.1°F (9.5°C)	0.3°F (0.2°C)	71st Coolest	Coolest since: 1937	1917
	49.4°F (9.7°C)	49.1°F (9.5°C)	0.3°F (0.2°C)	57th Warmest	Warmest since: 1936	2015
	Ties: 1958, 1966, 1993
Oct 1937–May 1938 8-Month	50.9°F (10.5°C)	50.4°F (10.2°C)	0.5°F (0.3°C)	76th Coolest	Coolest since: 1937	1917
	50.9°F (10.5°C)	50.4°F (10.2°C)	0.5°F (0.3°C)	52nd Warmest	Warmest since: 1936	2015
	Ties: 1924, 1936, 1963, 1970
Sep 1937–May 1938 9-Month	53.0°F (11.7°C)	52.4°F (11.3°C)	0.6°F (0.4°C)	81st Coolest	Coolest since: 1937	1917
	53.0°F (11.7°C)	52.4°F (11.3°C)	0.6°F (0.4°C)	47th Warmest	Warmest since: 1936	2015
	Ties: 1905, 1941, 2005
Aug 1937–May 1938 10-Month	55.2°F (12.9°C)	54.6°F (12.6°C)	0.6°F (0.3°C)	84th Coolest	Coolest since: 1937	1917
	55.2°F (12.9°C)	54.6°F (12.6°C)	0.6°F (0.3°C)	44th Warmest	Warmest since: 1936	2015
	Ties: 1936, 1941, 2005
Jul 1937–May 1938 11-Month	57.1°F (13.9°C)	56.4°F (13.6°C)	0.7°F (0.3°C)	90th Coolest	Coolest since: 1937	1917
	57.1°F (13.9°C)	56.4°F (13.6°C)	0.7°F (0.3°C)	38th Warmest	Warmest since: 1934	2015
	Ties: 1960, 1980, 1988, 1994, 2005
Jun 1937–May 1938 12-Month	58.1°F (14.5°C)	57.4°F (14.1°C)	0.7°F (0.4°C)	86th Coolest	Coolest since: 1937	1917
	58.1°F (14.5°C)	57.4°F (14.1°C)	0.7°F (0.4°C)	42nd Warmest	Warmest since: 1934	2015
	Ties: 1930, 1987, 2008
Dec 1936–May 1938 18-Month	54.3°F (12.4°C)	54.6°F (12.6°C)	-0.3°F (-0.2°C)	37th Coolest	Coolest since: 1933	1917
	54.3°F (12.4°C)	54.6°F (12.6°C)	-0.3°F (-0.2°C)	90th Warmest	Warmest since: 1937	2015
	Ties: 1897, 1907, 1914, 1924, 1948, 1957, 1975
Jun 1936–May 1938 24-Month	57.4°F (14.1°C)	57.4°F (14.1°C)	0.0°F (0.0°C)	54th Coolest	Coolest since: 1937	1913, 1917
	57.4°F (14.1°C)	57.4°F (14.1°C)	0.0°F (0.0°C)	73rd Warmest	Warmest since: 1937	2015
	Ties: 1926, 1932, 1937, 1944, 1963, 1983
Jun 1935–May 1938 36-Month	57.6°F (14.2°C)	57.4°F (14.1°C)	0.2°F (0.1°C)	70th Coolest	Coolest since: 1937	1913, 1917
	57.6°F (14.2°C)	57.4°F (14.1°C)	0.2°F (0.1°C)	56th Warmest	Warmest since: 1936	2016
	Ties: 1932, 1934, 1968, 1979
Jun 1934–May 1938 48-Month	57.5°F (14.2°C)	57.4°F (14.1°C)	0.1°F (0.1°C)	59th Coolest	Coolest since: 1935	1913
	57.5°F (14.2°C)	57.4°F (14.1°C)	0.1°F (0.1°C)	66th Warmest	Warmest since: 1937	2016, 2017, 2018
	Ties: 1931, 1935, 1954, 1968, 1978, 1979
Jun 1933–May 1938 60-Month	58.0°F (14.4°C)	57.3°F (14.1°C)	0.7°F (0.3°C)	84th Coolest	Coolest since: 1937	1913, 1917
	58.0°F (14.4°C)	57.3°F (14.1°C)	0.7°F (0.3°C)	40th Warmest	Warmest to Date	2018
	Ties: 1941, 1984

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published May 2023, retrieved on June 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings