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.

Ohio River Basin

Average Temperature Rankings, April 1999

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
April 1999 1-Month	54.8°F (12.7°C)	51.5°F (10.8°C)	3.3°F (1.9°C)	112th Coolest	Coolest since: 1998	1907
	54.8°F (12.7°C)	51.5°F (10.8°C)	3.3°F (1.9°C)	17th Warmest	Warmest since: 1991	1896
	Ties: 1921, 1986, 2011
Mar–Apr 1999 2-Month	46.3°F (7.9°C)	46.3°F (7.9°C)	0.0°F (0.0°C)	63rd Coolest	Coolest since: 1997	1926
Mar–Apr 1999 2-Month	46.3°F (7.9°C)	46.3°F (7.9°C)	0.0°F (0.0°C)	66th Warmest	Warmest since: 1998	2012
Feb–Apr 1999 3-Month	43.3°F (6.3°C)	41.5°F (5.3°C)	1.8°F (1.0°C)	94th Coolest	Coolest since: 1997	1978
	43.3°F (6.3°C)	41.5°F (5.3°C)	1.8°F (1.0°C)	35th Warmest	Warmest since: 1998	2012
	Ties: 1910
Jan–Apr 1999 4-Month	40.4°F (4.7°C)	38.5°F (3.6°C)	1.9°F (1.1°C)	103rd Coolest	Coolest since: 1997	1978
	40.4°F (4.7°C)	38.5°F (3.6°C)	1.9°F (1.1°C)	26th Warmest	Warmest since: 1998	2017
	Ties: 1933, 1935, 1973
Dec 1998–Apr 1999 5-Month	39.9°F (4.4°C)	37.3°F (2.9°C)	2.6°F (1.5°C)	111th Coolest	Coolest since: 1997	1978
	39.9°F (4.4°C)	37.3°F (2.9°C)	2.6°F (1.5°C)	17th Warmest	Warmest since: 1998	2012
	Ties: 1976
Nov 1998–Apr 1999 6-Month	40.8°F (4.9°C)	38.1°F (3.4°C)	2.7°F (1.5°C)	114th Coolest	Coolest since: 1997	1904
Nov 1998–Apr 1999 6-Month	40.8°F (4.9°C)	38.1°F (3.4°C)	2.7°F (1.5°C)	14th Warmest	Warmest since: 1998	2012
Oct 1998–Apr 1999 7-Month	43.0°F (6.1°C)	40.4°F (4.7°C)	2.6°F (1.4°C)	116th Coolest	Coolest since: 1998	1978
	43.0°F (6.1°C)	40.4°F (4.7°C)	2.6°F (1.4°C)	12th Warmest	Warmest since: 1991	2017
	Ties: 1974
Sep 1998–Apr 1999 8-Month	46.3°F (7.9°C)	43.6°F (6.4°C)	2.7°F (1.5°C)	120th Coolest	Coolest since: 1998	1918, 1977
	46.3°F (7.9°C)	43.6°F (6.4°C)	2.7°F (1.5°C)	8th Warmest	Warmest since: 1932	2017
	Ties: 2006
Aug 1998–Apr 1999 9-Month	49.3°F (9.6°C)	46.8°F (8.2°C)	2.5°F (1.4°C)	119th Coolest	Coolest since: 1998	1977
Aug 1998–Apr 1999 9-Month	49.3°F (9.6°C)	46.8°F (8.2°C)	2.5°F (1.4°C)	9th Warmest	Warmest since: 1932	2017
Jul 1998–Apr 1999 10-Month	51.7°F (10.9°C)	49.5°F (9.7°C)	2.2°F (1.2°C)	120th Coolest	Coolest since: 1998	1977
	51.7°F (10.9°C)	49.5°F (9.7°C)	2.2°F (1.2°C)	8th Warmest	Warmest since: 1932	2017
	Ties: 2000
Jun 1998–Apr 1999 11-Month	53.4°F (11.9°C)	51.3°F (10.7°C)	2.1°F (1.2°C)	119th Coolest	Coolest since: 1998	1977
	53.4°F (11.9°C)	51.3°F (10.7°C)	2.1°F (1.2°C)	9th Warmest	Warmest since: 1974	2017
	Ties: 1974, 2022
May 1998–Apr 1999 12-Month	54.4°F (12.4°C)	52.2°F (11.2°C)	2.2°F (1.2°C)	122nd Coolest	Coolest since: 1998	1918
	54.4°F (12.4°C)	52.2°F (11.2°C)	2.2°F (1.2°C)	6th Warmest	Warmest since: 1932	2017
	Ties: 2006
Nov 1997–Apr 1999 18-Month	50.0°F (10.0°C)	47.5°F (8.6°C)	2.5°F (1.4°C)	124th Coolest	Coolest since: 1998	1905, 1918
	50.0°F (10.0°C)	47.5°F (8.6°C)	2.5°F (1.4°C)	3rd Warmest	Warmest since: 1992	2017
	Ties: 1992
May 1997–Apr 1999 24-Month	53.6°F (12.0°C)	52.2°F (11.2°C)	1.4°F (0.8°C)	111th Coolest	Coolest since: 1998	1978
May 1997–Apr 1999 24-Month	53.6°F (12.0°C)	52.2°F (11.2°C)	1.4°F (0.8°C)	16th Warmest	Warmest since: 1992	2017
May 1996–Apr 1999 36-Month	53.1°F (11.7°C)	52.2°F (11.2°C)	0.9°F (0.5°C)	99th Coolest	Coolest since: 1998	1979
	53.1°F (11.7°C)	52.2°F (11.2°C)	0.9°F (0.5°C)	27th Warmest	Warmest since: 1992	2018
	Ties: 1950, 2004
May 1995–Apr 1999 48-Month	52.6°F (11.4°C)	52.1°F (11.2°C)	0.5°F (0.2°C)	77th Coolest	Coolest since: 1998	1980
	52.6°F (11.4°C)	52.1°F (11.2°C)	0.5°F (0.2°C)	48th Warmest	Warmest since: 1994	2019
	Ties: 1925, 1942, 1946, 1948, 1949, 1994
May 1994–Apr 1999 60-Month	52.7°F (11.5°C)	52.2°F (11.2°C)	0.5°F (0.3°C)	80th Coolest	Coolest since: 1998	1981
	52.7°F (11.5°C)	52.2°F (11.2°C)	0.5°F (0.3°C)	44th Warmest	Warmest since: 1995	2020
	Ties: 1942, 1945, 1949, 1950, 1953, 1976, 1990, 1995

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