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 2009

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2023)	Warmest/Coolest Since	Record
May 2009 1-Month	66.7°F (19.3°C)	60.7°F (15.9°C)	6.0°F (3.4°C)	126th Coolest	Coolest since: 2008	1977
May 2009 1-Month	66.7°F (19.3°C)	60.7°F (15.9°C)	6.0°F (3.4°C)	4th Warmest	Warmest since: 2001	2001
Apr–May 2009 2-Month	60.5°F (15.8°C)	57.4°F (14.1°C)	3.1°F (1.7°C)	114th Coolest	Coolest since: 2008	1967
Apr–May 2009 2-Month	60.5°F (15.8°C)	57.4°F (14.1°C)	3.1°F (1.7°C)	16th Warmest	Warmest since: 2000	1992
Mar–May 2009 3-Month	56.7°F (13.7°C)	54.5°F (12.5°C)	2.2°F (1.2°C)	102nd Coolest	Coolest since: 2008	1917
	56.7°F (13.7°C)	54.5°F (12.5°C)	2.2°F (1.2°C)	28th Warmest	Warmest since: 2007	1934
	Ties: 1959, 1984, 1994
Feb–May 2009 4-Month	53.9°F (12.2°C)	52.2°F (11.2°C)	1.7°F (1.0°C)	102nd Coolest	Coolest since: 2008	1917
	53.9°F (12.2°C)	52.2°F (11.2°C)	1.7°F (1.0°C)	28th Warmest	Warmest since: 2007	1934
	Ties: 1928, 1988, 2018
Jan–May 2009 5-Month	52.5°F (11.4°C)	50.2°F (10.1°C)	2.3°F (1.3°C)	110th Coolest	Coolest since: 2008	1917
Jan–May 2009 5-Month	52.5°F (11.4°C)	50.2°F (10.1°C)	2.3°F (1.3°C)	20th Warmest	Warmest since: 2007	2015
Dec 2008–May 2009 6-Month	50.7°F (10.4°C)	49.1°F (9.5°C)	1.6°F (0.9°C)	102nd Coolest	Coolest since: 2008	1917
	50.7°F (10.4°C)	49.1°F (9.5°C)	1.6°F (0.9°C)	27th Warmest	Warmest since: 2007	2015
	Ties: 2012
Nov 2008–May 2009 7-Month	51.2°F (10.7°C)	49.1°F (9.5°C)	2.1°F (1.2°C)	114th Coolest	Coolest since: 2008	1917
	51.2°F (10.7°C)	49.1°F (9.5°C)	2.1°F (1.2°C)	15th Warmest	Warmest since: 2007	2015
	Ties: 1959, 2007, 2013
Oct 2008–May 2009 8-Month	52.5°F (11.4°C)	50.4°F (10.2°C)	2.1°F (1.2°C)	112th Coolest	Coolest since: 2008	1917
	52.5°F (11.4°C)	50.4°F (10.2°C)	2.1°F (1.2°C)	17th Warmest	Warmest since: 2004	2015
	Ties: 2020
Sep 2008–May 2009 9-Month	54.7°F (12.6°C)	52.4°F (11.3°C)	2.3°F (1.3°C)	115th Coolest	Coolest since: 2008	1917
	54.7°F (12.6°C)	52.4°F (11.3°C)	2.3°F (1.3°C)	14th Warmest	Warmest since: 2004	2015
	Ties: 1959
Aug 2008–May 2009 10-Month	56.8°F (13.8°C)	54.6°F (12.6°C)	2.2°F (1.2°C)	114th Coolest	Coolest since: 2008	1917
Aug 2008–May 2009 10-Month	56.8°F (13.8°C)	54.6°F (12.6°C)	2.2°F (1.2°C)	15th Warmest	Warmest since: 2004	2015
Jul 2008–May 2009 11-Month	58.6°F (14.8°C)	56.4°F (13.6°C)	2.2°F (1.2°C)	116th Coolest	Coolest since: 2008	1917
Jul 2008–May 2009 11-Month	58.6°F (14.8°C)	56.4°F (13.6°C)	2.2°F (1.2°C)	13th Warmest	Warmest since: 2004	2015
Jun 2008–May 2009 12-Month	59.7°F (15.4°C)	57.4°F (14.1°C)	2.3°F (1.3°C)	119th Coolest	Coolest since: 2008	1917
	59.7°F (15.4°C)	57.4°F (14.1°C)	2.3°F (1.3°C)	10th Warmest	Warmest since: 2004	2015
	Ties: 1992, 1996, 2013
Dec 2007–May 2009 18-Month	56.1°F (13.4°C)	54.6°F (12.6°C)	1.5°F (0.8°C)	111th Coolest	Coolest since: 2008	1917
	56.1°F (13.4°C)	54.6°F (12.6°C)	1.5°F (0.8°C)	17th Warmest	Warmest since: 2007	2015
	Ties: 1940, 1941, 1959, 1987, 2001, 2020
Jun 2007–May 2009 24-Month	58.9°F (14.9°C)	57.4°F (14.1°C)	1.5°F (0.8°C)	112th Coolest	Coolest since: 2008	1913, 1917
	58.9°F (14.9°C)	57.4°F (14.1°C)	1.5°F (0.8°C)	16th Warmest	Warmest since: 2007	2015
	Ties: 1993, 2007
Jun 2006–May 2009 36-Month	59.1°F (15.1°C)	57.4°F (14.1°C)	1.7°F (1.0°C)	115th Coolest	Coolest since: 2008	1913, 1917
	59.1°F (15.1°C)	57.4°F (14.1°C)	1.7°F (1.0°C)	12th Warmest	Warmest since: 2005	2016
	Ties: 1997, 2005
Jun 2005–May 2009 48-Month	58.9°F (14.9°C)	57.4°F (14.1°C)	1.5°F (0.8°C)	112th Coolest	Coolest since: 2008	1913
	58.9°F (14.9°C)	57.4°F (14.1°C)	1.5°F (0.8°C)	14th Warmest	Warmest since: 2007	2016, 2017, 2018
	Ties: 2003, 2006
Jun 2004–May 2009 60-Month	58.7°F (14.8°C)	57.3°F (14.1°C)	1.4°F (0.7°C)	109th Coolest	Coolest since: 2003	1913, 1917
	58.7°F (14.8°C)	57.3°F (14.1°C)	1.4°F (0.7°C)	16th Warmest	Warmest since: 2008	2018
	Ties: 1997

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published June 2023, retrieved on June 8, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings