Regional Rankings

Regional Data Info
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.

Pacific Northwest Basin

Average Temperature Rankings, December 1998

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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 1998
1-Month
27.0°F
(-2.8°C)
28.1°F
(-2.2°C)
-1.1°F
(-0.6°C)
38th Coolest
Coolest since:
1990
91st Warmest
Warmest since:
1917
Nov–Dec 1998
2-Month
31.9°F
(-0.1°C)
31.3°F
(-0.4°C)
0.6°F
(0.3°C)
71st Coolest
Coolest since:
1985
58th Warmest
Warmest since:
1917
Ties: 1923, 1996
Oct–Dec 1998
3-Month
36.3°F
(2.4°C)
36.2°F
(2.3°C)
0.1°F
(0.1°C)
58th Coolest
Coolest since:
1985
71st Warmest
Warmest since:
1917
Ties: 1918, 1996, 2005
Sep–Dec 1998
4-Month
42.5°F
(5.8°C)
41.1°F
(5.1°C)
1.4°F
(0.7°C)
99th Coolest
Coolest since:
1985
30th Warmest
Warmest since:
1917
Ties: 1989
Aug–Dec 1998
5-Month
47.3°F
(8.5°C)
45.5°F
(7.5°C)
1.8°F
(1.0°C)
112th Coolest
Coolest since:
1985
17th Warmest
Warmest since:
1917, 2014
Ties: 1950, 1991, 2003, 2021
Jul–Dec 1998
6-Month
50.8°F
(10.4°C)
48.6°F
(9.2°C)
2.2°F
(1.2°C)
120th Coolest
Coolest since:
1985
9th Warmest
Warmest since:
2014
Jun–Dec 1998
7-Month
51.5°F
(10.8°C)
49.7°F
(9.8°C)
1.8°F
(1.0°C)
117th Coolest
Coolest since:
1916
12th Warmest
Warmest since:
2021
Ties: 1933, 1937, 1939
May–Dec 1998
8-Month
51.3°F
(10.7°C)
49.8°F
(9.9°C)
1.5°F
(0.8°C)
112th Coolest
Coolest since:
1916
17th Warmest
Warmest since:
2021
Ties: 1967, 2022
Apr–Dec 1998
9-Month
50.4°F
(10.2°C)
49.0°F
(9.4°C)
1.4°F
(0.8°C)
111th Coolest
Coolest since:
1916
18th Warmest
Warmest since:
2021
Ties: 1936
Mar–Dec 1998
10-Month
49.1°F
(9.5°C)
47.7°F
(8.7°C)
1.4°F
(0.8°C)
109th Coolest
Coolest since:
1916
20th Warmest
Warmest since:
2015
Ties: 1994
Feb–Dec 1998
11-Month
47.7°F
(8.7°C)
46.1°F
(7.8°C)
1.6°F
(0.9°C)
112th Coolest
Coolest since:
1955
17th Warmest
Warmest since:
2015
Ties: 2012
Jan–Dec 1998
12-Month
46.3°F
(7.9°C)
44.5°F
(6.9°C)
1.8°F
(1.0°C)
115th Coolest
Coolest since:
1916
14th Warmest
Warmest since:
2015
Jul 1997–Dec 1998
18-Month
47.4°F
(8.6°C)
45.9°F
(7.7°C)
1.5°F
(0.9°C)
116th Coolest
Coolest since:
1985
12th Warmest
Warmest since:
2015
Ties: 1958, 2013
Jan 1997–Dec 1998
24-Month
45.8°F
(7.7°C)
44.4°F
(6.9°C)
1.4°F
(0.8°C)
106th Coolest
Coolest since:
1917
22nd Warmest
Warmest since:
2015
Ties: 1999, 2006
Jan 1996–Dec 1998
36-Month
45.5°F
(7.5°C)
44.4°F
(6.9°C)
1.1°F
(0.6°C)
105th Coolest
Coolest since:
1913
22nd Warmest
Warmest since:
2016
Ties: 1936, 1994, 1996, 2001, 2008
Jan 1995–Dec 1998
48-Month
45.6°F
(7.6°C)
44.5°F
(6.9°C)
1.1°F
(0.7°C)
108th Coolest
Coolest since:
1913, 1914, 1919
18th Warmest
Warmest since:
2016, 2017
Ties: 1942, 1990, 1992, 1995, 2000
Jan 1994–Dec 1998
60-Month
45.7°F
(7.6°C)
44.5°F
(6.9°C)
1.2°F
(0.7°C)
112th Coolest
Coolest since:
1913
13th Warmest
Warmest since:
2018
Ties: 1990, 1992, 2003, 2008, 2014

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