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 1895

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1895 1-Month	61.3°F (16.3°C)	60.7°F (15.9°C)	0.6°F (0.4°C)	67th Coolest	Coolest since: 1895	1977
	61.3°F (16.3°C)	60.7°F (15.9°C)	0.6°F (0.4°C)	62nd Warmest	Warmest to Date	2001
	Ties: 1951, 1983, 1994
Apr–May 1895 2-Month	57.5°F (14.2°C)	57.4°F (14.1°C)	0.1°F (0.1°C)	63rd Coolest	Coolest since: 1895	1967
Apr–May 1895 2-Month	57.5°F (14.2°C)	57.4°F (14.1°C)	0.1°F (0.1°C)	66th Warmest	Warmest to Date	1992
Mar–May 1895 3-Month	54.3°F (12.4°C)	54.5°F (12.5°C)	-0.2°F (-0.1°C)	57th Coolest	Coolest since: 1895	1917
	54.3°F (12.4°C)	54.5°F (12.5°C)	-0.2°F (-0.1°C)	72nd Warmest	Warmest to Date	1934
	Ties: 1897, 1919, 1956
Feb–May 1895 4-Month	52.2°F (11.2°C)	52.2°F (11.2°C)	0.0°F (0.0°C)	57th Coolest	Coolest since: 1895	1917
	52.2°F (11.2°C)	52.2°F (11.2°C)	0.0°F (0.0°C)	72nd Warmest	Warmest to Date	1934
	Ties: 1951, 1973, 1979, 1980
Jan–May 1895 5-Month	49.9°F (9.9°C)	50.3°F (10.2°C)	-0.4°F (-0.3°C)	50th Coolest	Coolest since: 1895	1917
	49.9°F (9.9°C)	50.3°F (10.2°C)	-0.4°F (-0.3°C)	79th Warmest	Warmest to Date	2015
	Ties: 1950, 1957

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on January 28, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings