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, May 1917

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1917 1-Month	55.5°F (13.1°C)	60.7°F (15.9°C)	-5.2°F (-2.8°C)	5th Coolest	Coolest since: 1917	1977
May 1917 1-Month	55.5°F (13.1°C)	60.7°F (15.9°C)	-5.2°F (-2.8°C)	124th Warmest	Warmest since: 1916	2001
Apr–May 1917 2-Month	53.4°F (11.9°C)	57.3°F (14.1°C)	-3.9°F (-2.2°C)	3rd Coolest	Coolest since: 1917	1967
Apr–May 1917 2-Month	53.4°F (11.9°C)	57.3°F (14.1°C)	-3.9°F (-2.2°C)	126th Warmest	Warmest since: 1916	1992
Mar–May 1917 3-Month	50.2°F (10.1°C)	54.5°F (12.5°C)	-4.3°F (-2.4°C)	1st Coolest	Coolest since: 1917	1917
Mar–May 1917 3-Month	50.2°F (10.1°C)	54.5°F (12.5°C)	-4.3°F (-2.4°C)	128th Warmest	Warmest since: 1916	1934
Feb–May 1917 4-Month	48.4°F (9.1°C)	52.3°F (11.3°C)	-3.9°F (-2.2°C)	1st Coolest	Coolest since: 1917	1917
Feb–May 1917 4-Month	48.4°F (9.1°C)	52.3°F (11.3°C)	-3.9°F (-2.2°C)	128th Warmest	Warmest since: 1916	1934
Jan–May 1917 5-Month	46.0°F (7.8°C)	50.2°F (10.1°C)	-4.2°F (-2.3°C)	1st Coolest	Coolest since: 1917	1917
Jan–May 1917 5-Month	46.0°F (7.8°C)	50.2°F (10.1°C)	-4.2°F (-2.3°C)	128th Warmest	Warmest since: 1916	2015
Dec 1916–May 1917 6-Month	44.9°F (7.2°C)	49.0°F (9.4°C)	-4.1°F (-2.2°C)	1st Coolest	Coolest since: 1917	1917
Dec 1916–May 1917 6-Month	44.9°F (7.2°C)	49.0°F (9.4°C)	-4.1°F (-2.2°C)	127th Warmest	Warmest since: 1916	2015
Nov 1916–May 1917 7-Month	45.0°F (7.2°C)	49.1°F (9.5°C)	-4.1°F (-2.3°C)	1st Coolest	Coolest since: 1917	1917
Nov 1916–May 1917 7-Month	45.0°F (7.2°C)	49.1°F (9.5°C)	-4.1°F (-2.3°C)	127th Warmest	Warmest since: 1916	2015
Oct 1916–May 1917 8-Month	46.1°F (7.8°C)	50.4°F (10.2°C)	-4.3°F (-2.4°C)	1st Coolest	Coolest since: 1917	1917
Oct 1916–May 1917 8-Month	46.1°F (7.8°C)	50.4°F (10.2°C)	-4.3°F (-2.4°C)	127th Warmest	Warmest since: 1916	2015
Sep 1916–May 1917 9-Month	48.4°F (9.1°C)	52.4°F (11.3°C)	-4.0°F (-2.2°C)	1st Coolest	Coolest since: 1917	1917
Sep 1916–May 1917 9-Month	48.4°F (9.1°C)	52.4°F (11.3°C)	-4.0°F (-2.2°C)	127th Warmest	Warmest since: 1916	2015
Aug 1916–May 1917 10-Month	50.8°F (10.4°C)	54.6°F (12.6°C)	-3.8°F (-2.2°C)	1st Coolest	Coolest since: 1917	1917
Aug 1916–May 1917 10-Month	50.8°F (10.4°C)	54.6°F (12.6°C)	-3.8°F (-2.2°C)	127th Warmest	Warmest since: 1916	2015
Jul 1916–May 1917 11-Month	52.7°F (11.5°C)	56.3°F (13.5°C)	-3.6°F (-2.0°C)	1st Coolest	Coolest since: 1917	1917
Jul 1916–May 1917 11-Month	52.7°F (11.5°C)	56.3°F (13.5°C)	-3.6°F (-2.0°C)	127th Warmest	Warmest since: 1916	2015
Jun 1916–May 1917 12-Month	53.9°F (12.2°C)	57.4°F (14.1°C)	-3.5°F (-1.9°C)	1st Coolest	Coolest since: 1917	1917
Jun 1916–May 1917 12-Month	53.9°F (12.2°C)	57.4°F (14.1°C)	-3.5°F (-1.9°C)	127th Warmest	Warmest since: 1916	2015
Dec 1915–May 1917 18-Month	52.2°F (11.2°C)	54.6°F (12.6°C)	-2.4°F (-1.4°C)	1st Coolest	Coolest since: 1917	1917
Dec 1915–May 1917 18-Month	52.2°F (11.2°C)	54.6°F (12.6°C)	-2.4°F (-1.4°C)	126th Warmest	Warmest since: 1916	2015
Jun 1915–May 1917 24-Month	55.4°F (13.0°C)	57.3°F (14.1°C)	-1.9°F (-1.1°C)	1st Coolest	Coolest since: 1913	1913, 1917
	55.4°F (13.0°C)	57.3°F (14.1°C)	-1.9°F (-1.1°C)	126th Warmest	Warmest since: 1916	2015
	Ties: 1913
Jun 1914–May 1917 36-Month	55.8°F (13.2°C)	57.4°F (14.1°C)	-1.6°F (-0.9°C)	1st Coolest	Coolest since: 1913	1913, 1917
	55.8°F (13.2°C)	57.4°F (14.1°C)	-1.6°F (-0.9°C)	125th Warmest	Warmest since: 1916	2016
	Ties: 1913
Jun 1913–May 1917 48-Month	56.3°F (13.5°C)	57.3°F (14.1°C)	-1.0°F (-0.6°C)	2nd Coolest	Coolest since: 1915	1913
	56.3°F (13.5°C)	57.3°F (14.1°C)	-1.0°F (-0.6°C)	123rd Warmest	Warmest since: 1916	2016, 2017, 2018
	Ties: 1912, 1914, 1915, 1918, 1920
Jun 1912–May 1917 60-Month	56.1°F (13.4°C)	57.3°F (14.1°C)	-1.2°F (-0.7°C)	1st Coolest	Coolest since: 1913	1913, 1917
	56.1°F (13.4°C)	57.3°F (14.1°C)	-1.2°F (-0.7°C)	123rd Warmest	Warmest since: 1916	2018
	Ties: 1913

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on January 30, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings