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 2017

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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 2017 1-Month	63.5°F (17.5°C)	60.7°F (15.9°C)	2.8°F (1.6°C)	102nd Coolest	Coolest since: 2016	1977
	63.5°F (17.5°C)	60.7°F (15.9°C)	2.8°F (1.6°C)	27th Warmest	Warmest since: 2014	2001
	Ties: 1987
Apr–May 2017 2-Month	59.6°F (15.3°C)	57.4°F (14.1°C)	2.2°F (1.2°C)	98th Coolest	Coolest since: 2015	1967
Apr–May 2017 2-Month	59.6°F (15.3°C)	57.4°F (14.1°C)	2.2°F (1.2°C)	31st Warmest	Warmest since: 2016	1992
Mar–May 2017 3-Month	57.5°F (14.2°C)	54.5°F (12.5°C)	3.0°F (1.7°C)	115th Coolest	Coolest since: 2016	1917
	57.5°F (14.2°C)	54.5°F (12.5°C)	3.0°F (1.7°C)	14th Warmest	Warmest since: 2016	1934
	Ties: 1947, 2016
Feb–May 2017 4-Month	54.9°F (12.7°C)	52.2°F (11.2°C)	2.7°F (1.5°C)	116th Coolest	Coolest since: 2012	1917
	54.9°F (12.7°C)	52.2°F (11.2°C)	2.7°F (1.5°C)	13th Warmest	Warmest since: 2016	1934
	Ties: 1996
Jan–May 2017 5-Month	52.4°F (11.3°C)	50.2°F (10.1°C)	2.2°F (1.2°C)	108th Coolest	Coolest since: 2012	1917
Jan–May 2017 5-Month	52.4°F (11.3°C)	50.2°F (10.1°C)	2.2°F (1.2°C)	21st Warmest	Warmest since: 2016	2015
Dec 2016–May 2017 6-Month	50.9°F (10.5°C)	49.1°F (9.5°C)	1.8°F (1.0°C)	105th Coolest	Coolest since: 2012	1917
	50.9°F (10.5°C)	49.1°F (9.5°C)	1.8°F (1.0°C)	23rd Warmest	Warmest since: 2016	2015
	Ties: 2001
Nov 2016–May 2017 7-Month	51.1°F (10.6°C)	49.1°F (9.5°C)	2.0°F (1.1°C)	109th Coolest	Coolest since: 2012	1917
Nov 2016–May 2017 7-Month	51.1°F (10.6°C)	49.1°F (9.5°C)	2.0°F (1.1°C)	19th Warmest	Warmest since: 2016	2015
Oct 2016–May 2017 8-Month	52.3°F (11.3°C)	50.4°F (10.2°C)	1.9°F (1.1°C)	109th Coolest	Coolest since: 2012	1917
Oct 2016–May 2017 8-Month	52.3°F (11.3°C)	50.4°F (10.2°C)	1.9°F (1.1°C)	19th Warmest	Warmest since: 2016	2015
Sep 2016–May 2017 9-Month	54.2°F (12.3°C)	52.4°F (11.3°C)	1.8°F (1.0°C)	108th Coolest	Coolest since: 2012	1917
Sep 2016–May 2017 9-Month	54.2°F (12.3°C)	52.4°F (11.3°C)	1.8°F (1.0°C)	20th Warmest	Warmest since: 2016	2015
Aug 2016–May 2017 10-Month	56.4°F (13.6°C)	54.6°F (12.6°C)	1.8°F (1.0°C)	110th Coolest	Coolest since: 2012	1917
Aug 2016–May 2017 10-Month	56.4°F (13.6°C)	54.6°F (12.6°C)	1.8°F (1.0°C)	18th Warmest	Warmest since: 2016	2015
Jul 2016–May 2017 11-Month	58.3°F (14.6°C)	56.4°F (13.6°C)	1.9°F (1.0°C)	111th Coolest	Coolest since: 2012	1917
	58.3°F (14.6°C)	56.4°F (13.6°C)	1.9°F (1.0°C)	17th Warmest	Warmest since: 2016	2015
	Ties: 2020
Jun 2016–May 2017 12-Month	59.5°F (15.3°C)	57.4°F (14.1°C)	2.1°F (1.2°C)	114th Coolest	Coolest since: 2012	1917
Jun 2016–May 2017 12-Month	59.5°F (15.3°C)	57.4°F (14.1°C)	2.1°F (1.2°C)	14th Warmest	Warmest since: 2016	2015
Dec 2015–May 2017 18-Month	57.0°F (13.9°C)	54.6°F (12.6°C)	2.4°F (1.3°C)	119th Coolest	Coolest since: 2013	1917
Dec 2015–May 2017 18-Month	57.0°F (13.9°C)	54.6°F (12.6°C)	2.4°F (1.3°C)	8th Warmest	Warmest since: 2016	2015
Jun 2015–May 2017 24-Month	59.8°F (15.4°C)	57.4°F (14.1°C)	2.4°F (1.3°C)	120th Coolest	Coolest since: 2013	1913, 1917
	59.8°F (15.4°C)	57.4°F (14.1°C)	2.4°F (1.3°C)	7th Warmest	Warmest since: 2016	2015
	Ties: 1997, 2019
Jun 2014–May 2017 36-Month	60.4°F (15.8°C)	57.4°F (14.1°C)	3.0°F (1.7°C)	123rd Coolest	Coolest since: 2014	1913, 1917
Jun 2014–May 2017 36-Month	60.4°F (15.8°C)	57.4°F (14.1°C)	3.0°F (1.7°C)	3rd Warmest	Warmest since: 2016	2016
Jun 2013–May 2017 48-Month	60.4°F (15.8°C)	57.4°F (14.1°C)	3.0°F (1.7°C)	124th Coolest	Coolest since: 2016	1913
	60.4°F (15.8°C)	57.4°F (14.1°C)	3.0°F (1.7°C)	1st Warmest	Warmest since: 2016	2016, 2017, 2018
	Ties: 2016, 2018
Jun 2012–May 2017 60-Month	60.2°F (15.7°C)	57.3°F (14.1°C)	2.9°F (1.6°C)	122nd Coolest	Coolest since: 2016	1913, 1917
	60.2°F (15.7°C)	57.3°F (14.1°C)	2.9°F (1.6°C)	2nd Warmest	Warmest to Date	2018
	Ties: 2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published March 2023, retrieved on March 25, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings