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 1948

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1948 1-Month	58.2°F (14.6°C)	60.7°F (15.9°C)	-2.5°F (-1.3°C)	22nd Coolest	Coolest since: 1942	1977
	58.2°F (14.6°C)	60.7°F (15.9°C)	-2.5°F (-1.3°C)	107th Warmest	Warmest since: 1947	2001
	Ties: 1902, 1964, 1980
Apr–May 1948 2-Month	54.8°F (12.7°C)	57.3°F (14.1°C)	-2.5°F (-1.4°C)	13th Coolest	Coolest since: 1933	1967
	54.8°F (12.7°C)	57.3°F (14.1°C)	-2.5°F (-1.4°C)	116th Warmest	Warmest since: 1947	1992
	Ties: 1921
Mar–May 1948 3-Month	51.4°F (10.8°C)	54.5°F (12.5°C)	-3.1°F (-1.7°C)	4th Coolest	Coolest since: 1917	1917
Mar–May 1948 3-Month	51.4°F (10.8°C)	54.5°F (12.5°C)	-3.1°F (-1.7°C)	125th Warmest	Warmest since: 1947	1934
Feb–May 1948 4-Month	49.2°F (9.6°C)	52.3°F (11.3°C)	-3.1°F (-1.7°C)	2nd Coolest	Coolest since: 1933	1917
	49.2°F (9.6°C)	52.3°F (11.3°C)	-3.1°F (-1.7°C)	127th Warmest	Warmest since: 1947	1934
	Ties: 1933
Jan–May 1948 5-Month	48.4°F (9.1°C)	50.2°F (10.1°C)	-1.8°F (-1.0°C)	10th Coolest	Coolest since: 1937	1917
	48.4°F (9.1°C)	50.2°F (10.1°C)	-1.8°F (-1.0°C)	119th Warmest	Warmest since: 1947	2015
	Ties: 1911, 1929, 1964
Dec 1947–May 1948 6-Month	47.3°F (8.5°C)	49.0°F (9.4°C)	-1.7°F (-0.9°C)	11th Coolest	Coolest since: 1937	1917
Dec 1947–May 1948 6-Month	47.3°F (8.5°C)	49.0°F (9.4°C)	-1.7°F (-0.9°C)	117th Warmest	Warmest since: 1947	2015
Nov 1947–May 1948 7-Month	47.1°F (8.4°C)	49.1°F (9.5°C)	-2.0°F (-1.1°C)	5th Coolest	Coolest since: 1933	1917
Nov 1947–May 1948 7-Month	47.1°F (8.4°C)	49.1°F (9.5°C)	-2.0°F (-1.1°C)	123rd Warmest	Warmest since: 1947	2015
Oct 1947–May 1948 8-Month	48.7°F (9.3°C)	50.5°F (10.3°C)	-1.8°F (-1.0°C)	6th Coolest	Coolest since: 1933	1917
	48.7°F (9.3°C)	50.5°F (10.3°C)	-1.8°F (-1.0°C)	122nd Warmest	Warmest since: 1947	2015
	Ties: 1929, 1955
Sep 1947–May 1948 9-Month	51.1°F (10.6°C)	52.4°F (11.3°C)	-1.3°F (-0.7°C)	14th Coolest	Coolest since: 1942	1917
	51.1°F (10.6°C)	52.4°F (11.3°C)	-1.3°F (-0.7°C)	114th Warmest	Warmest since: 1947	2015
	Ties: 1898, 1937, 1942
Aug 1947–May 1948 10-Month	53.2°F (11.8°C)	54.6°F (12.6°C)	-1.4°F (-0.8°C)	9th Coolest	Coolest since: 1942	1917
	53.2°F (11.8°C)	54.6°F (12.6°C)	-1.4°F (-0.8°C)	119th Warmest	Warmest since: 1947	2015
	Ties: 1921, 1929, 1942
Jul 1947–May 1948 11-Month	54.9°F (12.7°C)	56.3°F (13.5°C)	-1.4°F (-0.8°C)	7th Coolest	Coolest since: 1933	1917
	54.9°F (12.7°C)	56.3°F (13.5°C)	-1.4°F (-0.8°C)	121st Warmest	Warmest since: 1947	2015
	Ties: 1933
Jun 1947–May 1948 12-Month	56.0°F (13.3°C)	57.4°F (14.1°C)	-1.4°F (-0.8°C)	7th Coolest	Coolest since: 1921	1917
	56.0°F (13.3°C)	57.4°F (14.1°C)	-1.4°F (-0.8°C)	121st Warmest	Warmest since: 1947	2015
	Ties: 1921
Dec 1946–May 1948 18-Month	54.3°F (12.4°C)	54.6°F (12.6°C)	-0.3°F (-0.2°C)	38th Coolest	Coolest since: 1945	1917
	54.3°F (12.4°C)	54.6°F (12.6°C)	-0.3°F (-0.2°C)	89th Warmest	Warmest since: 1947	2015
	Ties: 1897, 1907, 1914, 1924, 1957, 1975
Jun 1946–May 1948 24-Month	56.8°F (13.8°C)	57.4°F (14.1°C)	-0.6°F (-0.3°C)	23rd Coolest	Coolest since: 1945	1913, 1917
	56.8°F (13.8°C)	57.4°F (14.1°C)	-0.6°F (-0.3°C)	104th Warmest	Warmest since: 1947	2015
	Ties: 1898, 1902, 1965
Jun 1945–May 1948 36-Month	57.0°F (13.9°C)	57.3°F (14.1°C)	-0.3°F (-0.2°C)	31st Coolest	Coolest since: 1946	1913, 1917
	57.0°F (13.9°C)	57.3°F (14.1°C)	-0.3°F (-0.2°C)	95th Warmest	Warmest since: 1947	2016
	Ties: 1901, 1902, 1944, 1955, 1956, 1974
Jun 1944–May 1948 48-Month	56.9°F (13.8°C)	57.4°F (14.1°C)	-0.5°F (-0.3°C)	26th Coolest	Coolest since: 1945	1913
	56.9°F (13.8°C)	57.4°F (14.1°C)	-0.5°F (-0.3°C)	99th Warmest	Warmest since: 1947	2016, 2017, 2018
	Ties: 1905, 1906, 1925, 1955, 1958
Jun 1943–May 1948 60-Month	56.8°F (13.8°C)	57.3°F (14.1°C)	-0.5°F (-0.3°C)	21st Coolest	Coolest since: 1925	1913, 1917
	56.8°F (13.8°C)	57.3°F (14.1°C)	-0.5°F (-0.3°C)	103rd Warmest	Warmest since: 1947	2018
	Ties: 1902, 1904, 1905, 1909

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 5, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings