Regional Rankings

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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.

California River Basin

Average Temperature Rankings, June 1939

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
June 1939 1-Month	68.4°F (20.2°C)	68.2°F (20.1°C)	0.2°F (0.1°C)	60th Coolest	Coolest since: 1934	1923
	68.4°F (20.2°C)	68.2°F (20.1°C)	0.2°F (0.1°C)	69th Warmest	Warmest since: 1938	2021
	Ties: 1997
May–Jun 1939 2-Month	65.4°F (18.6°C)	64.5°F (18.1°C)	0.9°F (0.5°C)	78th Coolest	Coolest since: 1938	1953
	65.4°F (18.6°C)	64.5°F (18.1°C)	0.9°F (0.5°C)	51st Warmest	Warmest since: 1937	2001
	Ties: 1919, 1922, 1934, 1961
Apr–Jun 1939 3-Month	63.0°F (17.2°C)	61.0°F (16.1°C)	2.0°F (1.1°C)	100th Coolest	Coolest since: 1938	1967, 1998
	63.0°F (17.2°C)	61.0°F (16.1°C)	2.0°F (1.1°C)	29th Warmest	Warmest since: 1936	2021
	Ties: 1936, 1959, 2012
Mar–Jun 1939 4-Month	59.6°F (15.3°C)	58.0°F (14.4°C)	1.6°F (0.9°C)	95th Coolest	Coolest since: 1938	1917
	59.6°F (15.3°C)	58.0°F (14.4°C)	1.6°F (0.9°C)	34th Warmest	Warmest since: 1936	2015
	Ties: 1984, 1993
Feb–Jun 1939 5-Month	55.7°F (13.2°C)	55.4°F (13.0°C)	0.3°F (0.2°C)	68th Coolest	Coolest since: 1938	1917
	55.7°F (13.2°C)	55.4°F (13.0°C)	0.3°F (0.2°C)	61st Warmest	Warmest since: 1936	2015
	Ties: 1904, 1974, 1979
Jan–Jun 1939 6-Month	53.6°F (12.0°C)	53.3°F (11.8°C)	0.3°F (0.2°C)	70th Coolest	Coolest since: 1938	1917
	53.6°F (12.0°C)	53.3°F (11.8°C)	0.3°F (0.2°C)	59th Warmest	Warmest since: 1936	2015
	Ties: 1905, 1910
Dec 1938–Jun 1939 7-Month	52.4°F (11.3°C)	51.8°F (11.0°C)	0.6°F (0.3°C)	76th Coolest	Coolest since: 1938	1917
	52.4°F (11.3°C)	51.8°F (11.0°C)	0.6°F (0.3°C)	52nd Warmest	Warmest since: 1936	2015
	Ties: 1918, 1958
Nov 1938–Jun 1939 8-Month	51.7°F (10.9°C)	51.5°F (10.8°C)	0.2°F (0.1°C)	61st Coolest	Coolest since: 1937	1917
	51.7°F (10.9°C)	51.5°F (10.8°C)	0.2°F (0.1°C)	67th Warmest	Warmest since: 1938	2015
	Ties: 1925, 1958, 1972, 1985, 1993
Oct 1938–Jun 1939 9-Month	52.4°F (11.3°C)	52.4°F (11.3°C)	0.0°F (0.0°C)	60th Coolest	Coolest since: 1937	1917
	52.4°F (11.3°C)	52.4°F (11.3°C)	0.0°F (0.0°C)	68th Warmest	Warmest since: 1938	2015
	Ties: 1935, 1956, 1957, 1974
Sep 1938–Jun 1939 10-Month	54.2°F (12.3°C)	54.0°F (12.2°C)	0.2°F (0.1°C)	69th Coolest	Coolest since: 1937	1917
	54.2°F (12.3°C)	54.0°F (12.2°C)	0.2°F (0.1°C)	59th Warmest	Warmest since: 1938	2015
	Ties: 1904, 1947, 1957, 1963, 1966, 1985, 2010
Aug 1938–Jun 1939 11-Month	56.0°F (13.3°C)	55.8°F (13.2°C)	0.2°F (0.1°C)	68th Coolest	Coolest since: 1937	1917
	56.0°F (13.3°C)	55.8°F (13.2°C)	0.2°F (0.1°C)	60th Warmest	Warmest since: 1938	2015
	Ties: 1935, 1956, 1963, 1966, 1982, 2010
Jul 1938–Jun 1939 12-Month	57.6°F (14.2°C)	57.4°F (14.1°C)	0.2°F (0.1°C)	71st Coolest	Coolest since: 1937	1917
	57.6°F (14.2°C)	57.4°F (14.1°C)	0.2°F (0.1°C)	57th Warmest	Warmest since: 1938	2015
	Ties: 1900, 1924, 1935, 1947, 1982
Jan 1938–Jun 1939 18-Month	56.0°F (13.3°C)	56.0°F (13.3°C)	0.0°F (0.0°C)	57th Coolest	Coolest since: 1938	1917
	56.0°F (13.3°C)	56.0°F (13.3°C)	0.0°F (0.0°C)	71st Warmest	Warmest since: 1937	2015
	Ties: 1930, 1943, 1947, 1958, 1962, 1974, 1977, 2011
Jul 1937–Jun 1939 24-Month	57.9°F (14.4°C)	57.4°F (14.1°C)	0.5°F (0.3°C)	81st Coolest	Coolest since: 1938	1913
	57.9°F (14.4°C)	57.4°F (14.1°C)	0.5°F (0.3°C)	46th Warmest	Warmest since: 1935	2015
	Ties: 1968
Jul 1936–Jun 1939 36-Month	57.5°F (14.2°C)	57.4°F (14.1°C)	0.1°F (0.1°C)	60th Coolest	Coolest since: 1937	1913, 1917
	57.5°F (14.2°C)	57.4°F (14.1°C)	0.1°F (0.1°C)	66th Warmest	Warmest since: 1938	2016
	Ties: 1927, 1963, 1969, 1972
Jul 1935–Jun 1939 48-Month	57.6°F (14.2°C)	57.4°F (14.1°C)	0.2°F (0.1°C)	68th Coolest	Coolest since: 1938	1913
	57.6°F (14.2°C)	57.4°F (14.1°C)	0.2°F (0.1°C)	57th Warmest	Warmest since: 1938	2016
	Ties: 1935, 1938, 1968, 1971
Jul 1934–Jun 1939 60-Month	57.6°F (14.2°C)	57.4°F (14.1°C)	0.2°F (0.1°C)	71st Coolest	Coolest since: 1937	1913, 1917
	57.6°F (14.2°C)	57.4°F (14.1°C)	0.2°F (0.1°C)	53rd Warmest	Warmest since: 1938	2018
	Ties: 1935, 1936, 1937, 1944, 1970, 1972, 1980

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published November 2022, retrieved on December 2, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings