Statewide Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Delaware

Average Temperature Rankings, September 1989

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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
September 1989 1-Month	68.7°F (20.4°C)	67.4°F (19.7°C)	1.3°F (0.7°C)	87th Coolest	Coolest since: 1988	1917
	68.7°F (20.4°C)	67.4°F (19.7°C)	1.3°F (0.7°C)	42nd Warmest	Warmest since: 1987	2018
	Ties: 1942, 2020
Aug–Sep 1989 2-Month	71.4°F (21.9°C)	70.6°F (21.4°C)	0.8°F (0.5°C)	78th Coolest	Coolest since: 1986	1927, 1963
	71.4°F (21.9°C)	70.6°F (21.4°C)	0.8°F (0.5°C)	51st Warmest	Warmest since: 1988	2018
	Ties: 1911, 1991
Jul–Sep 1989 3-Month	72.6°F (22.6°C)	72.2°F (22.3°C)	0.4°F (0.3°C)	76th Coolest	Coolest since: 1986	1909
	72.6°F (22.6°C)	72.2°F (22.3°C)	0.4°F (0.3°C)	53rd Warmest	Warmest since: 1988	2016
	Ties: 1895, 1942, 1947, 1954, 1957
Jun–Sep 1989 4-Month	73.0°F (22.8°C)	71.9°F (22.2°C)	1.1°F (0.6°C)	89th Coolest	Coolest since: 1986	1927
	73.0°F (22.8°C)	71.9°F (22.2°C)	1.1°F (0.6°C)	40th Warmest	Warmest since: 1988	2010
	Ties: 1906, 1955, 1957, 2003
May–Sep 1989 5-Month	70.7°F (21.5°C)	69.9°F (21.1°C)	0.8°F (0.4°C)	80th Coolest	Coolest since: 1985	1924, 1927
	70.7°F (21.5°C)	69.9°F (21.1°C)	0.8°F (0.4°C)	49th Warmest	Warmest since: 1988	2010
	Ties: 1901, 1921, 1936, 1952, 1983, 2009
Apr–Sep 1989 6-Month	67.5°F (19.7°C)	66.9°F (19.4°C)	0.6°F (0.3°C)	71st Coolest	Coolest since: 1984	1907
	67.5°F (19.7°C)	66.9°F (19.4°C)	0.6°F (0.3°C)	58th Warmest	Warmest since: 1988	2010
	Ties: 1911, 1943, 1945
Mar–Sep 1989 7-Month	63.9°F (17.7°C)	63.5°F (17.5°C)	0.4°F (0.2°C)	67th Coolest	Coolest since: 1984	1924
	63.9°F (17.7°C)	63.5°F (17.5°C)	0.4°F (0.2°C)	62nd Warmest	Warmest since: 1988	2010
	Ties: 1910, 1933
Feb–Sep 1989 8-Month	60.4°F (15.8°C)	59.8°F (15.4°C)	0.6°F (0.4°C)	75th Coolest	Coolest since: 1984	1907
	60.4°F (15.8°C)	59.8°F (15.4°C)	0.6°F (0.4°C)	54th Warmest	Warmest since: 1988	2012
	Ties: 1944, 1980, 1997
Jan–Sep 1989 9-Month	57.9°F (14.4°C)	56.9°F (13.8°C)	1.0°F (0.6°C)	91st Coolest	Coolest since: 1988	1940
	57.9°F (14.4°C)	56.9°F (13.8°C)	1.0°F (0.6°C)	38th Warmest	Warmest since: 1976	2012
	Ties: 1898, 1932, 1976, 2009
Dec 1988–Sep 1989 10-Month	55.7°F (13.2°C)	54.8°F (12.7°C)	0.9°F (0.5°C)	82nd Coolest	Coolest since: 1988	1904
	55.7°F (13.2°C)	54.8°F (12.7°C)	0.9°F (0.5°C)	46th Warmest	Warmest since: 1987	2012
	Ties: 1942, 1987
Nov 1988–Sep 1989 11-Month	55.0°F (12.8°C)	54.0°F (12.2°C)	1.0°F (0.6°C)	89th Coolest	Coolest since: 1988	1904
	55.0°F (12.8°C)	54.0°F (12.2°C)	1.0°F (0.6°C)	39th Warmest	Warmest since: 1986	2012
	Ties: 1980, 1986, 1990, 1993
Oct 1988–Sep 1989 12-Month	54.7°F (12.6°C)	54.2°F (12.3°C)	0.5°F (0.3°C)	77th Coolest	Coolest since: 1988	1904
	54.7°F (12.6°C)	54.2°F (12.3°C)	0.5°F (0.3°C)	51st Warmest	Warmest since: 1987	2012
	Ties: 1900, 1937, 1947, 1959, 1997, 2014
Apr 1988–Sep 1989 18-Month	59.0°F (15.0°C)	58.4°F (14.7°C)	0.6°F (0.3°C)	80th Coolest	Coolest since: 1984	1918
	59.0°F (15.0°C)	58.4°F (14.7°C)	0.6°F (0.3°C)	48th Warmest	Warmest since: 1988	2012
	Ties: 1901, 1933, 1950, 1983
Oct 1987–Sep 1989 24-Month	54.6°F (12.6°C)	54.2°F (12.3°C)	0.4°F (0.3°C)	73rd Coolest	Coolest since: 1983	1905
	54.6°F (12.6°C)	54.2°F (12.3°C)	0.4°F (0.3°C)	54th Warmest	Warmest since: 1988	2017
	Ties: 1914, 1942, 1960, 1977, 1994
Oct 1986–Sep 1989 36-Month	54.8°F (12.7°C)	54.2°F (12.3°C)	0.6°F (0.4°C)	79th Coolest	Coolest since: 1984	1905, 1918
	54.8°F (12.7°C)	54.2°F (12.3°C)	0.6°F (0.4°C)	47th Warmest	Warmest since: 1988	2018
	Ties: 1939, 1950, 1952, 1990
Oct 1985–Sep 1989 48-Month	54.9°F (12.7°C)	54.2°F (12.3°C)	0.7°F (0.4°C)	85th Coolest	Coolest since: 1985	1905
	54.9°F (12.7°C)	54.2°F (12.3°C)	0.7°F (0.4°C)	40th Warmest	Warmest since: 1988	2019
	Ties: 1990, 1995
Oct 1984–Sep 1989 60-Month	55.1°F (12.8°C)	54.1°F (12.3°C)	1.0°F (0.5°C)	92nd Coolest	Coolest since: 1988	1908
	55.1°F (12.8°C)	54.1°F (12.3°C)	1.0°F (0.5°C)	32nd Warmest	Warmest since: 1987	2020
	Ties: 1987, 1998

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published May 2023, retrieved on May 31, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings