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 1915

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Record Coolest

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1915 1-Month	57.0°F (13.9°C)	60.7°F (15.9°C)	-3.7°F (-2.0°C)	11th Coolest	Coolest since: 1908	1977
May 1915 1-Month	57.0°F (13.9°C)	60.7°F (15.9°C)	-3.7°F (-2.0°C)	118th Warmest	Warmest since: 1914	2001
Apr–May 1915 2-Month	55.7°F (13.2°C)	57.4°F (14.1°C)	-1.7°F (-0.9°C)	25th Coolest	Coolest since: 1912	1967
	55.7°F (13.2°C)	57.4°F (14.1°C)	-1.7°F (-0.9°C)	104th Warmest	Warmest since: 1914	1992
	Ties: 1901, 1905, 1908, 1922, 1944, 1977, 1995
Mar–May 1915 3-Month	54.0°F (12.2°C)	54.5°F (12.5°C)	-0.5°F (-0.3°C)	50th Coolest	Coolest since: 1913	1917
	54.0°F (12.2°C)	54.5°F (12.5°C)	-0.5°F (-0.3°C)	79th Warmest	Warmest since: 1914	1934
	Ties: 1905, 1958, 1961, 1970
Feb–May 1915 4-Month	51.6°F (10.9°C)	52.2°F (11.2°C)	-0.6°F (-0.3°C)	43rd Coolest	Coolest since: 1913	1917
	51.6°F (10.9°C)	52.2°F (11.2°C)	-0.6°F (-0.3°C)	86th Warmest	Warmest since: 1914	1934
	Ties: 1901, 1927, 1965, 2019
Jan–May 1915 5-Month	49.5°F (9.7°C)	50.2°F (10.1°C)	-0.7°F (-0.4°C)	32nd Coolest	Coolest since: 1913	1917
	49.5°F (9.7°C)	50.2°F (10.1°C)	-0.7°F (-0.4°C)	97th Warmest	Warmest since: 1914	2015
	Ties: 1899, 1909, 1919
Dec 1914–May 1915 6-Month	47.8°F (8.8°C)	49.1°F (9.5°C)	-1.3°F (-0.7°C)	17th Coolest	Coolest since: 1913	1917
	47.8°F (8.8°C)	49.1°F (9.5°C)	-1.3°F (-0.7°C)	111th Warmest	Warmest since: 1914	2015
	Ties: 1998
Nov 1914–May 1915 7-Month	48.3°F (9.1°C)	49.1°F (9.5°C)	-0.8°F (-0.4°C)	29th Coolest	Coolest since: 1913	1917
	48.3°F (9.1°C)	49.1°F (9.5°C)	-0.8°F (-0.4°C)	99th Warmest	Warmest since: 1914	2015
	Ties: 1909, 1944, 1969
Oct 1914–May 1915 8-Month	49.7°F (9.8°C)	50.4°F (10.2°C)	-0.7°F (-0.4°C)	28th Coolest	Coolest since: 1913	1917
	49.7°F (9.8°C)	50.4°F (10.2°C)	-0.7°F (-0.4°C)	100th Warmest	Warmest since: 1914	2015
	Ties: 1906, 1944, 1969, 1985, 1998, 1999
Sep 1914–May 1915 9-Month	51.5°F (10.8°C)	52.4°F (11.3°C)	-0.9°F (-0.5°C)	21st Coolest	Coolest since: 1913	1917
	51.5°F (10.8°C)	52.4°F (11.3°C)	-0.9°F (-0.5°C)	107th Warmest	Warmest since: 1914	2015
	Ties: 1952
Aug 1914–May 1915 10-Month	53.7°F (12.1°C)	54.6°F (12.6°C)	-0.9°F (-0.5°C)	22nd Coolest	Coolest since: 1913	1917
	53.7°F (12.1°C)	54.6°F (12.6°C)	-0.9°F (-0.5°C)	106th Warmest	Warmest since: 1914	2015
	Ties: 1896, 1908, 1962, 1969
Jul 1914–May 1915 11-Month	55.5°F (13.1°C)	56.4°F (13.6°C)	-0.9°F (-0.5°C)	19th Coolest	Coolest since: 1913	1917
	55.5°F (13.1°C)	56.4°F (13.6°C)	-0.9°F (-0.5°C)	109th Warmest	Warmest since: 1914	2015
	Ties: 1908, 1952
Jun 1914–May 1915 12-Month	56.5°F (13.6°C)	57.4°F (14.1°C)	-0.9°F (-0.5°C)	19th Coolest	Coolest since: 1913	1917
	56.5°F (13.6°C)	57.4°F (14.1°C)	-0.9°F (-0.5°C)	109th Warmest	Warmest since: 1914	2015
	Ties: 1896
Dec 1913–May 1915 18-Month	54.4°F (12.4°C)	54.6°F (12.6°C)	-0.2°F (-0.2°C)	45th Coolest	Coolest since: 1914	1917
	54.4°F (12.4°C)	54.6°F (12.6°C)	-0.2°F (-0.2°C)	82nd Warmest	Warmest since: 1906	2015
	Ties: 1900, 1906, 1930, 1946, 1952, 1969
Jun 1913–May 1915 24-Month	57.2°F (14.0°C)	57.4°F (14.1°C)	-0.2°F (-0.1°C)	48th Coolest	Coolest since: 1914	1913, 1917
	57.2°F (14.0°C)	57.4°F (14.1°C)	-0.2°F (-0.1°C)	79th Warmest	Warmest since: 1906	2015
	Ties: 1900, 1906, 1943, 1966
Jun 1912–May 1915 36-Month	56.5°F (13.6°C)	57.4°F (14.1°C)	-0.9°F (-0.5°C)	12th Coolest	Coolest since: 1914	1913, 1917
	56.5°F (13.6°C)	57.4°F (14.1°C)	-0.9°F (-0.5°C)	114th Warmest	Warmest since: 1911	2016
	Ties: 1910, 1923
Jun 1911–May 1915 48-Month	56.3°F (13.5°C)	57.4°F (14.1°C)	-1.1°F (-0.6°C)	2nd Coolest	Coolest since: 1914	1913
	56.3°F (13.5°C)	57.4°F (14.1°C)	-1.1°F (-0.6°C)	123rd Warmest	Warmest since: 1914	2016, 2017, 2018
	Ties: 1912, 1914, 1917, 1918, 1920
Jun 1910–May 1915 60-Month	56.4°F (13.6°C)	57.3°F (14.1°C)	-0.9°F (-0.5°C)	5th Coolest	Coolest since: 1914	1913, 1917
	56.4°F (13.6°C)	57.3°F (14.1°C)	-0.9°F (-0.5°C)	119th Warmest	Warmest since: 1914	2018
	Ties: 1914, 1916, 1920

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published March 2023, retrieved on March 21, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings