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 1921

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1921 1-Month	57.1°F (13.9°C)	60.7°F (15.9°C)	-3.6°F (-2.0°C)	12th Coolest	Coolest since: 1917	1977
	57.1°F (13.9°C)	60.7°F (15.9°C)	-3.6°F (-2.0°C)	117th Warmest	Warmest since: 1920	2001
	Ties: 1911
Apr–May 1921 2-Month	54.8°F (12.7°C)	57.4°F (14.1°C)	-2.6°F (-1.4°C)	13th Coolest	Coolest since: 1917	1967
Apr–May 1921 2-Month	54.8°F (12.7°C)	57.4°F (14.1°C)	-2.6°F (-1.4°C)	116th Warmest	Warmest since: 1920	1992
Mar–May 1921 3-Month	53.4°F (11.9°C)	54.5°F (12.5°C)	-1.1°F (-0.6°C)	36th Coolest	Coolest since: 1920	1917
	53.4°F (11.9°C)	54.5°F (12.5°C)	-1.1°F (-0.6°C)	93rd Warmest	Warmest since: 1919	1934
	Ties: 1907, 1929, 1938, 1995
Feb–May 1921 4-Month	51.5°F (10.8°C)	52.2°F (11.2°C)	-0.7°F (-0.4°C)	42nd Coolest	Coolest since: 1920	1917
Feb–May 1921 4-Month	51.5°F (10.8°C)	52.2°F (11.2°C)	-0.7°F (-0.4°C)	87th Warmest	Warmest since: 1916	1934
Jan–May 1921 5-Month	49.4°F (9.7°C)	50.2°F (10.1°C)	-0.8°F (-0.4°C)	29th Coolest	Coolest since: 1918	1917
	49.4°F (9.7°C)	50.2°F (10.1°C)	-0.8°F (-0.4°C)	100th Warmest	Warmest since: 1920	2015
	Ties: 1897, 1977
Dec 1920–May 1921 6-Month	48.2°F (9.0°C)	49.1°F (9.5°C)	-0.9°F (-0.5°C)	32nd Coolest	Coolest since: 1919	1917
	48.2°F (9.0°C)	49.1°F (9.5°C)	-0.9°F (-0.5°C)	96th Warmest	Warmest since: 1920	2015
	Ties: 1991
Nov 1920–May 1921 7-Month	48.1°F (8.9°C)	49.1°F (9.5°C)	-1.0°F (-0.6°C)	21st Coolest	Coolest since: 1919	1917
	48.1°F (8.9°C)	49.1°F (9.5°C)	-1.0°F (-0.6°C)	107th Warmest	Warmest since: 1920	2015
	Ties: 1911
Oct 1920–May 1921 8-Month	48.9°F (9.4°C)	50.4°F (10.2°C)	-1.5°F (-0.8°C)	11th Coolest	Coolest since: 1917	1917
	48.9°F (9.4°C)	50.4°F (10.2°C)	-1.5°F (-0.8°C)	117th Warmest	Warmest since: 1920	2015
	Ties: 1922, 1937
Sep 1920–May 1921 9-Month	50.8°F (10.4°C)	52.4°F (11.3°C)	-1.6°F (-0.9°C)	6th Coolest	Coolest since: 1917	1917
	50.8°F (10.4°C)	52.4°F (11.3°C)	-1.6°F (-0.9°C)	122nd Warmest	Warmest since: 1920	2015
	Ties: 1932, 1933, 1955
Aug 1920–May 1921 10-Month	53.2°F (11.8°C)	54.6°F (12.6°C)	-1.4°F (-0.8°C)	9th Coolest	Coolest since: 1917	1917
	53.2°F (11.8°C)	54.6°F (12.6°C)	-1.4°F (-0.8°C)	119th Warmest	Warmest since: 1920	2015
	Ties: 1929, 1942, 1948
Jul 1920–May 1921 11-Month	55.0°F (12.8°C)	56.4°F (13.6°C)	-1.4°F (-0.8°C)	9th Coolest	Coolest since: 1917	1917
Jul 1920–May 1921 11-Month	55.0°F (12.8°C)	56.4°F (13.6°C)	-1.4°F (-0.8°C)	119th Warmest	Warmest since: 1920	2015
Jun 1920–May 1921 12-Month	56.0°F (13.3°C)	57.4°F (14.1°C)	-1.4°F (-0.8°C)	7th Coolest	Coolest since: 1917	1917
	56.0°F (13.3°C)	57.4°F (14.1°C)	-1.4°F (-0.8°C)	121st Warmest	Warmest since: 1920	2015
	Ties: 1948
Dec 1919–May 1921 18-Month	53.4°F (11.9°C)	54.6°F (12.6°C)	-1.2°F (-0.7°C)	7th Coolest	Coolest since: 1917	1917
Dec 1919–May 1921 18-Month	53.4°F (11.9°C)	54.6°F (12.6°C)	-1.2°F (-0.7°C)	120th Warmest	Warmest since: 1920	2015
Jun 1919–May 1921 24-Month	56.2°F (13.4°C)	57.4°F (14.1°C)	-1.2°F (-0.7°C)	6th Coolest	Coolest since: 1918	1913, 1917
	56.2°F (13.4°C)	57.4°F (14.1°C)	-1.2°F (-0.7°C)	121st Warmest	Warmest since: 1920	2015
	Ties: 1922, 1950
Jun 1918–May 1921 36-Month	56.4°F (13.6°C)	57.4°F (14.1°C)	-1.0°F (-0.5°C)	10th Coolest	Coolest since: 1919	1913, 1917
	56.4°F (13.6°C)	57.4°F (14.1°C)	-1.0°F (-0.5°C)	116th Warmest	Warmest since: 1920	2016
	Ties: 1903
Jun 1917–May 1921 48-Month	56.8°F (13.8°C)	57.4°F (14.1°C)	-0.6°F (-0.3°C)	22nd Coolest	Coolest since: 1920	1913
	56.8°F (13.8°C)	57.4°F (14.1°C)	-0.6°F (-0.3°C)	103rd Warmest	Warmest since: 1908	2016, 2017, 2018
	Ties: 1901, 1945, 1952
Jun 1916–May 1921 60-Month	56.2°F (13.4°C)	57.3°F (14.1°C)	-1.1°F (-0.7°C)	3rd Coolest	Coolest since: 1917	1913, 1917
Jun 1916–May 1921 60-Month	56.2°F (13.4°C)	57.3°F (14.1°C)	-1.1°F (-0.7°C)	121st Warmest	Warmest since: 1920	2018

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published May 2023, retrieved on June 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings