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

Regional Rankings

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Please note, 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.

Northwest

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	27.6°F (-2.4°C)	28.8°F (-1.8°C)	-1.2°F	35th Coolest	Coolest since: 1992	1990
	27.6°F (-2.4°C)	28.8°F (-1.8°C)	-1.2°F	96th Warmest	Warmest since: 1997	1917
	Ties: 1911
Nov–Dec 1998 2-Month	32.5°F (0.3°C)	32.1°F (0.1°C)	0.4°F	68th Coolest	Coolest since: 1994	1985
	32.5°F (0.3°C)	32.1°F (0.1°C)	0.4°F	63rd Warmest	Warmest since: 1997	1917
	Ties: 1947
Oct–Dec 1998 3-Month	36.9°F (2.7°C)	36.9°F (2.7°C)	0.0°F	56th Coolest	Coolest since: 1994	1985
	36.9°F (2.7°C)	36.9°F (2.7°C)	0.0°F	75th Warmest	Warmest since: 1997	1917
	Ties: 1957
Sep–Dec 1998 4-Month	43.1°F (6.2°C)	41.8°F (5.4°C)	1.3°F	98th Coolest	Coolest since: 1997	1985
Sep–Dec 1998 4-Month	43.1°F (6.2°C)	41.8°F (5.4°C)	1.3°F	33rd Warmest	Warmest since: 1995	1917
Aug–Dec 1998 5-Month	47.9°F (8.8°C)	46.1°F (7.8°C)	1.8°F	110th Coolest	Coolest since: 1997	1985
Aug–Dec 1998 5-Month	47.9°F (8.8°C)	46.1°F (7.8°C)	1.8°F	21st Warmest	Warmest since: 1991	2024
Jul–Dec 1998 6-Month	51.4°F (10.8°C)	49.2°F (9.6°C)	2.2°F	120th Coolest	Coolest since: 1997	1985
	51.4°F (10.8°C)	49.2°F (9.6°C)	2.2°F	11th Warmest	Warmest since: 1958	2024
	Ties: 1958
Jun–Dec 1998 7-Month	52.1°F (11.2°C)	50.4°F (10.2°C)	1.7°F	117th Coolest	Coolest since: 1997	1916
	52.1°F (11.2°C)	50.4°F (10.2°C)	1.7°F	14th Warmest	Warmest since: 1967	2024
	Ties: 1933, 1937
May–Dec 1998 8-Month	51.8°F (11.0°C)	50.4°F (10.2°C)	1.4°F	109th Coolest	Coolest since: 1997	1916
May–Dec 1998 8-Month	51.8°F (11.0°C)	50.4°F (10.2°C)	1.4°F	22nd Warmest	Warmest since: 1987	2023
Apr–Dec 1998 9-Month	50.9°F (10.5°C)	49.6°F (9.8°C)	1.3°F	109th Coolest	Coolest since: 1997	1916
Apr–Dec 1998 9-Month	50.9°F (10.5°C)	49.6°F (9.8°C)	1.3°F	22nd Warmest	Warmest since: 1992	2021
Mar–Dec 1998 10-Month	49.6°F (9.8°C)	48.3°F (9.1°C)	1.3°F	108th Coolest	Coolest since: 1997	1916
	49.6°F (9.8°C)	48.3°F (9.1°C)	1.3°F	23rd Warmest	Warmest since: 1994	2015
	Ties: 1994
Feb–Dec 1998 11-Month	48.2°F (9.0°C)	46.7°F (8.2°C)	1.5°F	112th Coolest	Coolest since: 1997	1955
Feb–Dec 1998 11-Month	48.2°F (9.0°C)	46.7°F (8.2°C)	1.5°F	19th Warmest	Warmest since: 1992	2015
Jan–Dec 1998 12-Month	46.9°F (8.3°C)	45.1°F (7.3°C)	1.8°F	116th Coolest	Coolest since: 1997	1916
Jan–Dec 1998 12-Month	46.9°F (8.3°C)	45.1°F (7.3°C)	1.8°F	15th Warmest	Warmest since: 1992	2015
Jul 1997–Dec 1998 18-Month	47.9°F (8.8°C)	46.5°F (8.1°C)	1.4°F	114th Coolest	Coolest since: 1997	1985
Jul 1997–Dec 1998 18-Month	47.9°F (8.8°C)	46.5°F (8.1°C)	1.4°F	16th Warmest	Warmest since: 1992	2015
Jan 1997–Dec 1998 24-Month	46.5°F (8.1°C)	45.1°F (7.3°C)	1.4°F	110th Coolest	Coolest since: 1997	1917
Jan 1997–Dec 1998 24-Month	46.5°F (8.1°C)	45.1°F (7.3°C)	1.4°F	20th Warmest	Warmest since: 1995	2015
Jan 1996–Dec 1998 36-Month	46.2°F (7.9°C)	45.1°F (7.3°C)	1.1°F	106th Coolest	Coolest since: 1997	1913
Jan 1996–Dec 1998 36-Month	46.2°F (7.9°C)	45.1°F (7.3°C)	1.1°F	23rd Warmest	Warmest since: 1996	2016
Jan 1995–Dec 1998 48-Month	46.2°F (7.9°C)	45.1°F (7.3°C)	1.1°F	107th Coolest	Coolest since: 1997	1913, 1914
Jan 1995–Dec 1998 48-Month	46.2°F (7.9°C)	45.1°F (7.3°C)	1.1°F	21st Warmest	Warmest since: 1997	2016, 2017
Jan 1994–Dec 1998 60-Month	46.3°F (7.9°C)	45.0°F (7.2°C)	1.3°F	112th Coolest	Coolest since: 1997	1913
Jan 1994–Dec 1998 60-Month	46.3°F (7.9°C)	45.0°F (7.2°C)	1.3°F	15th Warmest	Warmest since: 1992	2018

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published March 2025, retrieved on March 26, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings

Climate at a Glance Regional Rankings

Regional Rankings

Northwest

December 1998 Average Temperature Rankings

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