Climate at a Glance | Statewide Rankings | National Centers for Environmental Information (NCEI)

Statewide Rankings

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Delaware

December 1998 Average Temperature Rankings

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2025)	Coolest/Warmest Since	Record
December 1998 1-Month	42.0°F (5.6°C)	36.2°F (2.3°C)	5.8°F	116th Coolest	Coolest since: 1997	1989
	42.0°F (5.6°C)	36.2°F (2.3°C)	5.8°F	15th Warmest	Warmest since: 1994	2015
	Ties: 1994
Nov–Dec 1998 2-Month	44.6°F (7.0°C)	41.0°F (5.0°C)	3.6°F	116th Coolest	Coolest since: 1997	1917
Nov–Dec 1998 2-Month	44.6°F (7.0°C)	41.0°F (5.0°C)	3.6°F	15th Warmest	Warmest since: 1994	2015
Oct–Dec 1998 3-Month	48.9°F (9.4°C)	46.1°F (7.8°C)	2.8°F	107th Coolest	Coolest since: 1997	1917
Oct–Dec 1998 3-Month	48.9°F (9.4°C)	46.1°F (7.8°C)	2.8°F	24th Warmest	Warmest since: 1994	2015
Sep–Dec 1998 4-Month	54.5°F (12.5°C)	51.4°F (10.8°C)	3.1°F	117th Coolest	Coolest since: 1997	1917
Sep–Dec 1998 4-Month	54.5°F (12.5°C)	51.4°F (10.8°C)	3.1°F	14th Warmest	Warmest since: 1990	2015
Aug–Dec 1998 5-Month	58.6°F (14.8°C)	55.9°F (13.3°C)	2.7°F	117th Coolest	Coolest since: 1997	1917
Aug–Dec 1998 5-Month	58.6°F (14.8°C)	55.9°F (13.3°C)	2.7°F	14th Warmest	Warmest since: 1931	2015
Jul–Dec 1998 6-Month	61.5°F (16.4°C)	59.2°F (15.1°C)	2.3°F	112th Coolest	Coolest since: 1997	1917
Jul–Dec 1998 6-Month	61.5°F (16.4°C)	59.2°F (15.1°C)	2.3°F	19th Warmest	Warmest since: 1990	2015
Jun–Dec 1998 7-Month	62.9°F (17.2°C)	60.8°F (16.0°C)	2.1°F	109th Coolest	Coolest since: 1997	1917
Jun–Dec 1998 7-Month	62.9°F (17.2°C)	60.8°F (16.0°C)	2.1°F	22nd Warmest	Warmest since: 1990	2015
May–Dec 1998 8-Month	63.1°F (17.3°C)	61.0°F (16.1°C)	2.1°F	112th Coolest	Coolest since: 1997	1917
May–Dec 1998 8-Month	63.1°F (17.3°C)	61.0°F (16.1°C)	2.1°F	19th Warmest	Warmest since: 1991	2015
Apr–Dec 1998 9-Month	62.3°F (16.8°C)	60.0°F (15.6°C)	2.3°F	117th Coolest	Coolest since: 1997	1917
Apr–Dec 1998 9-Month	62.3°F (16.8°C)	60.0°F (15.6°C)	2.3°F	14th Warmest	Warmest since: 1991	2015
Mar–Dec 1998 10-Month	60.6°F (15.9°C)	58.3°F (14.6°C)	2.3°F	115th Coolest	Coolest since: 1997	1917
Mar–Dec 1998 10-Month	60.6°F (15.9°C)	58.3°F (14.6°C)	2.3°F	16th Warmest	Warmest since: 1991	2012
Feb–Dec 1998 11-Month	58.8°F (14.9°C)	56.1°F (13.4°C)	2.7°F	120th Coolest	Coolest since: 1997	1917
Feb–Dec 1998 11-Month	58.8°F (14.9°C)	56.1°F (13.4°C)	2.7°F	11th Warmest	Warmest since: 1991	2012
Jan–Dec 1998 12-Month	57.4°F (14.1°C)	54.2°F (12.3°C)	3.2°F	125th Coolest	Coolest since: 1997	1904
Jan–Dec 1998 12-Month	57.4°F (14.1°C)	54.2°F (12.3°C)	3.2°F	6th Warmest	Warmest to Date	2012
Jul 1997–Dec 1998 18-Month	58.1°F (14.5°C)	55.9°F (13.3°C)	2.2°F	112th Coolest	Coolest since: 1997	1904
Jul 1997–Dec 1998 18-Month	58.1°F (14.5°C)	55.9°F (13.3°C)	2.2°F	18th Warmest	Warmest since: 1991	2012
Jan 1997–Dec 1998 24-Month	56.1°F (13.4°C)	54.2°F (12.3°C)	1.9°F	111th Coolest	Coolest since: 1997	1905
Jan 1997–Dec 1998 24-Month	56.1°F (13.4°C)	54.2°F (12.3°C)	1.9°F	19th Warmest	Warmest since: 1991	2012
Jan 1996–Dec 1998 36-Month	55.4°F (13.0°C)	54.2°F (12.3°C)	1.2°F	101st Coolest	Coolest since: 1997	1905
Jan 1996–Dec 1998 36-Month	55.4°F (13.0°C)	54.2°F (12.3°C)	1.2°F	28th Warmest	Warmest since: 1992	2021
Jan 1995–Dec 1998 48-Month	55.3°F (12.9°C)	54.2°F (12.3°C)	1.1°F	98th Coolest	Coolest since: 1997	1907
Jan 1995–Dec 1998 48-Month	55.3°F (12.9°C)	54.2°F (12.3°C)	1.1°F	30th Warmest	Warmest since: 1993	2020
Jan 1994–Dec 1998 60-Month	55.3°F (12.9°C)	54.2°F (12.3°C)	1.1°F	97th Coolest	Coolest since: 1997	1905
	55.3°F (12.9°C)	54.2°F (12.3°C)	1.1°F	30th Warmest	Warmest since: 1994	2020, 2021
	Ties: 1992

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on April 2, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings

Climate at a Glance Statewide Rankings

Statewide Rankings

Delaware

December 1998 Average Temperature Rankings

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