Regional Rankings

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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.

Ohio River Basin

Average Temperature Rankings, December 1999

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Record Coolest

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
December 1999 1-Month	35.0°F (1.7°C)	32.4°F (0.2°C)	2.6°F (1.5°C)	89th Coolest	Coolest since: 1997	1989
December 1999 1-Month	35.0°F (1.7°C)	32.4°F (0.2°C)	2.6°F (1.5°C)	40th Warmest	Warmest since: 1998	2015
Nov–Dec 1999 2-Month	41.7°F (5.4°C)	37.4°F (3.0°C)	4.3°F (2.4°C)	119th Coolest	Coolest since: 1998	1976
Nov–Dec 1999 2-Month	41.7°F (5.4°C)	37.4°F (3.0°C)	4.3°F (2.4°C)	10th Warmest	Warmest since: 1994	2015
Oct–Dec 1999 3-Month	45.7°F (7.6°C)	43.0°F (6.1°C)	2.7°F (1.5°C)	111th Coolest	Coolest since: 1997	1917
Oct–Dec 1999 3-Month	45.7°F (7.6°C)	43.0°F (6.1°C)	2.7°F (1.5°C)	18th Warmest	Warmest since: 1998	2015
Sep–Dec 1999 4-Month	50.7°F (10.4°C)	48.7°F (9.3°C)	2.0°F (1.1°C)	107th Coolest	Coolest since: 1997	1976
	50.7°F (10.4°C)	48.7°F (9.3°C)	2.0°F (1.1°C)	22nd Warmest	Warmest since: 1998	1931
	Ties: 1956
Aug–Dec 1999 5-Month	54.9°F (12.7°C)	53.4°F (11.9°C)	1.5°F (0.8°C)	109th Coolest	Coolest since: 1997	1976
	54.9°F (12.7°C)	53.4°F (11.9°C)	1.5°F (0.8°C)	20th Warmest	Warmest since: 1998	1931
	Ties: 1921, 1956, 1970, 2005
Jul–Dec 1999 6-Month	58.6°F (14.8°C)	56.8°F (13.8°C)	1.8°F (1.0°C)	114th Coolest	Coolest since: 1997	1976
	58.6°F (14.8°C)	56.8°F (13.8°C)	1.8°F (1.0°C)	15th Warmest	Warmest since: 1998	1931
	Ties: 2020
Jun–Dec 1999 7-Month	60.4°F (15.8°C)	58.7°F (14.8°C)	1.7°F (1.0°C)	115th Coolest	Coolest since: 1997	1976
	60.4°F (15.8°C)	58.7°F (14.8°C)	1.7°F (1.0°C)	14th Warmest	Warmest since: 1998	1931
	Ties: 2018, 2019, 2020
May–Dec 1999 8-Month	60.7°F (15.9°C)	59.0°F (15.0°C)	1.7°F (0.9°C)	112th Coolest	Coolest since: 1997	1917
	60.7°F (15.9°C)	59.0°F (15.0°C)	1.7°F (0.9°C)	17th Warmest	Warmest since: 1998	1931
	Ties: 1933
Apr–Dec 1999 9-Month	60.1°F (15.6°C)	58.2°F (14.6°C)	1.9°F (1.0°C)	116th Coolest	Coolest since: 1997	1917
	60.1°F (15.6°C)	58.2°F (14.6°C)	1.9°F (1.0°C)	13th Warmest	Warmest since: 1998	2015
	Ties: 2001
Mar–Dec 1999 10-Month	57.8°F (14.3°C)	56.5°F (13.6°C)	1.3°F (0.7°C)	106th Coolest	Coolest since: 1997	1917
	57.8°F (14.3°C)	56.5°F (13.6°C)	1.3°F (0.7°C)	23rd Warmest	Warmest since: 1998	2016
	Ties: 2004, 2017, 2018
Feb–Dec 1999 11-Month	56.0°F (13.3°C)	54.3°F (12.4°C)	1.7°F (0.9°C)	116th Coolest	Coolest since: 1997	1917
	56.0°F (13.3°C)	54.3°F (12.4°C)	1.7°F (0.9°C)	13th Warmest	Warmest since: 1998	2012
	Ties: 1922, 1946
Jan–Dec 1999 12-Month	53.9°F (12.2°C)	52.2°F (11.2°C)	1.7°F (1.0°C)	112th Coolest	Coolest since: 1997	1917
	53.9°F (12.2°C)	52.2°F (11.2°C)	1.7°F (1.0°C)	17th Warmest	Warmest since: 1998	2012
	Ties: 1933, 1946, 2002, 2019
Jul 1998–Dec 1999 18-Month	55.7°F (13.2°C)	53.7°F (12.1°C)	2.0°F (1.1°C)	121st Coolest	Coolest since: 1998	1904, 1917
	55.7°F (13.2°C)	53.7°F (12.1°C)	2.0°F (1.1°C)	7th Warmest	Warmest since: 1932	2012, 2016
	Ties: 2021
Jan 1998–Dec 1999 24-Month	54.6°F (12.6°C)	52.2°F (11.2°C)	2.4°F (1.4°C)	125th Coolest	Coolest since: 1998	1979
Jan 1998–Dec 1999 24-Month	54.6°F (12.6°C)	52.2°F (11.2°C)	2.4°F (1.4°C)	3rd Warmest	Warmest to Date	2017
Jan 1997–Dec 1999 36-Month	53.6°F (12.0°C)	52.2°F (11.2°C)	1.4°F (0.8°C)	114th Coolest	Coolest since: 1998	1980
	53.6°F (12.0°C)	52.2°F (11.2°C)	1.4°F (0.8°C)	13th Warmest	Warmest since: 1992	2018
	Ties: 1954, 1992, 2006
Jan 1996–Dec 1999 48-Month	53.0°F (11.7°C)	52.2°F (11.2°C)	0.8°F (0.5°C)	99th Coolest	Coolest since: 1998	1979
	53.0°F (11.7°C)	52.2°F (11.2°C)	0.8°F (0.5°C)	27th Warmest	Warmest since: 1993	2019
	Ties: 1932, 1935, 1939, 1949, 1957, 1992, 2003, 2015
Jan 1995–Dec 1999 60-Month	52.8°F (11.6°C)	52.2°F (11.2°C)	0.6°F (0.4°C)	90th Coolest	Coolest since: 1998	1980
	52.8°F (11.6°C)	52.2°F (11.2°C)	0.6°F (0.4°C)	35th Warmest	Warmest since: 1994	2020
	Ties: 1925, 1939, 1942, 1949, 1953, 1954, 1990, 1993

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published March 2023, retrieved on March 21, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings