Regional Rankings

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Month:

Region:

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 2020

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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 2020 1-Month	64.6°F (18.1°C)	60.7°F (15.9°C)	3.9°F (2.2°C)	120th Coolest	Coolest since: 2019	1977
	64.6°F (18.1°C)	60.7°F (15.9°C)	3.9°F (2.2°C)	9th Warmest	Warmest since: 2014	2001
	Ties: 1940, 2006, 2014
Apr–May 2020 2-Month	60.6°F (15.9°C)	57.4°F (14.1°C)	3.2°F (1.8°C)	117th Coolest	Coolest since: 2019	1967
	60.6°F (15.9°C)	57.4°F (14.1°C)	3.2°F (1.8°C)	12th Warmest	Warmest since: 2014	1992
	Ties: 1910, 1947, 1954
Mar–May 2020 3-Month	56.4°F (13.6°C)	54.5°F (12.5°C)	1.9°F (1.1°C)	94th Coolest	Coolest since: 2019	1917
	56.4°F (13.6°C)	54.5°F (12.5°C)	1.9°F (1.1°C)	35th Warmest	Warmest since: 2018	1934
	Ties: 2018
Feb–May 2020 4-Month	54.6°F (12.6°C)	52.2°F (11.2°C)	2.4°F (1.4°C)	110th Coolest	Coolest since: 2019	1917
	54.6°F (12.6°C)	52.2°F (11.2°C)	2.4°F (1.4°C)	19th Warmest	Warmest since: 2017	1934
	Ties: 2021
Jan–May 2020 5-Month	52.7°F (11.5°C)	50.2°F (10.1°C)	2.5°F (1.4°C)	113th Coolest	Coolest since: 2019	1917
Jan–May 2020 5-Month	52.7°F (11.5°C)	50.2°F (10.1°C)	2.5°F (1.4°C)	16th Warmest	Warmest since: 2018	2015
Dec 2019–May 2020 6-Month	51.4°F (10.8°C)	49.1°F (9.5°C)	2.3°F (1.3°C)	113th Coolest	Coolest since: 2019	1917
	51.4°F (10.8°C)	49.1°F (9.5°C)	2.3°F (1.3°C)	15th Warmest	Warmest since: 2018	2015
	Ties: 1981
Nov 2019–May 2020 7-Month	51.6°F (10.9°C)	49.1°F (9.5°C)	2.5°F (1.4°C)	117th Coolest	Coolest since: 2019	1917
Nov 2019–May 2020 7-Month	51.6°F (10.9°C)	49.1°F (9.5°C)	2.5°F (1.4°C)	11th Warmest	Warmest since: 2018	2015
Oct 2019–May 2020 8-Month	52.5°F (11.4°C)	50.4°F (10.2°C)	2.1°F (1.2°C)	111th Coolest	Coolest since: 2019	1917
	52.5°F (11.4°C)	50.4°F (10.2°C)	2.1°F (1.2°C)	17th Warmest	Warmest since: 2018	2015
	Ties: 2009
Sep 2019–May 2020 9-Month	54.3°F (12.4°C)	52.4°F (11.3°C)	1.9°F (1.1°C)	110th Coolest	Coolest since: 2019	1917
	54.3°F (12.4°C)	52.4°F (11.3°C)	1.9°F (1.1°C)	18th Warmest	Warmest since: 2018	2015
	Ties: 1984
Aug 2019–May 2020 10-Month	56.6°F (13.7°C)	54.6°F (12.6°C)	2.0°F (1.1°C)	111th Coolest	Coolest since: 2019	1917
Aug 2019–May 2020 10-Month	56.6°F (13.7°C)	54.6°F (12.6°C)	2.0°F (1.1°C)	17th Warmest	Warmest since: 2018	2015
Jul 2019–May 2020 11-Month	58.3°F (14.6°C)	56.4°F (13.6°C)	1.9°F (1.0°C)	111th Coolest	Coolest since: 2019	1917
	58.3°F (14.6°C)	56.4°F (13.6°C)	1.9°F (1.0°C)	17th Warmest	Warmest since: 2018	2015
	Ties: 2017
Jun 2019–May 2020 12-Month	59.3°F (15.2°C)	57.4°F (14.1°C)	1.9°F (1.1°C)	112th Coolest	Coolest since: 2019	1917
	59.3°F (15.2°C)	57.4°F (14.1°C)	1.9°F (1.1°C)	16th Warmest	Warmest since: 2018	2015
	Ties: 1959, 2000
Dec 2018–May 2020 18-Month	56.1°F (13.4°C)	54.6°F (12.6°C)	1.5°F (0.8°C)	111th Coolest	Coolest since: 2012	1917
	56.1°F (13.4°C)	54.6°F (12.6°C)	1.5°F (0.8°C)	16th Warmest	Warmest since: 2019	2015
	Ties: 1940, 1941, 1959, 1987, 2001, 2009
Jun 2018–May 2020 24-Month	59.2°F (15.1°C)	57.4°F (14.1°C)	1.8°F (1.0°C)	116th Coolest	Coolest since: 2013	1913, 1917
Jun 2018–May 2020 24-Month	59.2°F (15.1°C)	57.4°F (14.1°C)	1.8°F (1.0°C)	11th Warmest	Warmest since: 2019	2015
Jun 2017–May 2020 36-Month	59.7°F (15.4°C)	57.4°F (14.1°C)	2.3°F (1.3°C)	120th Coolest	Coolest since: 2019	1913, 1917
	59.7°F (15.4°C)	57.4°F (14.1°C)	2.3°F (1.3°C)	6th Warmest	Warmest since: 2019	2016
	Ties: 2019, 2021
Jun 2016–May 2020 48-Month	59.6°F (15.3°C)	57.4°F (14.1°C)	2.2°F (1.2°C)	117th Coolest	Coolest since: 2014	1913
Jun 2016–May 2020 48-Month	59.6°F (15.3°C)	57.4°F (14.1°C)	2.2°F (1.2°C)	8th Warmest	Warmest since: 2019	2016, 2017, 2018
Jun 2015–May 2020 60-Month	59.7°F (15.4°C)	57.3°F (14.1°C)	2.4°F (1.3°C)	117th Coolest	Coolest since: 2015	1913, 1917
Jun 2015–May 2020 60-Month	59.7°F (15.4°C)	57.3°F (14.1°C)	2.4°F (1.3°C)	7th Warmest	Warmest since: 2019	2018

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published May 2023, retrieved on May 27, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings