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 2015

View Period (Months):
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Warmest/Coolest
Since
Record
December 2015
1-Month
29.0°F
(-1.7°C)
28.1°F
(-2.2°C)
0.9°F
(0.5°C)
74th Coolest
Coolest since:
1990
54th Warmest
Warmest since:
1917
Ties: 2006
Nov–Dec 2015
2-Month
31.1°F
(-0.5°C)
31.3°F
(-0.4°C)
-0.2°F
(-0.1°C)
53rd Coolest
Coolest since:
1985
75th Warmest
Warmest since:
1917
Ties: 1970
Oct–Dec 2015
3-Month
38.0°F
(3.3°C)
36.1°F
(2.3°C)
1.9°F
(1.0°C)
109th Coolest
Coolest since:
1985
19th Warmest
Warmest since:
1917
Ties: 1987, 2020, 2021
Sep–Dec 2015
4-Month
42.7°F
(5.9°C)
41.0°F
(5.0°C)
1.7°F
(0.9°C)
104th Coolest
Coolest since:
1985
24th Warmest
Warmest since:
1917
Ties: 1934
Aug–Dec 2015
5-Month
47.4°F
(8.6°C)
45.5°F
(7.5°C)
1.9°F
(1.1°C)
117th Coolest
Coolest since:
1985
11th Warmest
Warmest since:
1917, 2014
Ties: 1904, 1933, 1963, 1967
Jul–Dec 2015
6-Month
50.6°F
(10.3°C)
48.7°F
(9.3°C)
1.9°F
(1.0°C)
119th Coolest
Coolest since:
1985
9th Warmest
Warmest since:
2014
Ties: 1937, 1958, 2017
Jun–Dec 2015
7-Month
52.6°F
(11.4°C)
49.8°F
(9.9°C)
2.8°F
(1.5°C)
126th Coolest
Coolest since:
1916
2nd Warmest
Warmest to Date
2021
May–Dec 2015
8-Month
52.6°F
(11.4°C)
49.7°F
(9.8°C)
2.9°F
(1.6°C)
126th Coolest
Coolest since:
1916
2nd Warmest
Warmest to Date
2021
Apr–Dec 2015
9-Month
51.7°F
(10.9°C)
49.0°F
(9.4°C)
2.7°F
(1.5°C)
126th Coolest
Coolest since:
1916
2nd Warmest
Warmest to Date
2021
Mar–Dec 2015
10-Month
50.8°F
(10.4°C)
47.7°F
(8.7°C)
3.1°F
(1.7°C)
127th Coolest
Coolest since:
1916
1st Warmest
Warmest to Date
2015
Feb–Dec 2015
11-Month
49.7°F
(9.8°C)
46.1°F
(7.8°C)
3.6°F
(2.0°C)
127th Coolest
Coolest since:
1955
1st Warmest
Warmest to Date
2015
Jan–Dec 2015
12-Month
48.3°F
(9.1°C)
44.4°F
(6.9°C)
3.9°F
(2.2°C)
127th Coolest
Coolest since:
1916
1st Warmest
Warmest to Date
2015
Jul 2014–Dec 2015
18-Month
49.4°F
(9.7°C)
45.8°F
(7.7°C)
3.6°F
(2.0°C)
126th Coolest
Coolest since:
1985
1st Warmest
Warmest to Date
2015
Jan 2014–Dec 2015
24-Month
47.7°F
(8.7°C)
44.5°F
(6.9°C)
3.2°F
(1.8°C)
126th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2015
Jan 2013–Dec 2015
36-Month
47.0°F
(8.3°C)
44.5°F
(6.9°C)
2.5°F
(1.4°C)
124th Coolest
Coolest since:
1913
2nd Warmest
Warmest to Date
2016
Ties: 2017
Jan 2012–Dec 2015
48-Month
46.8°F
(8.2°C)
44.4°F
(6.9°C)
2.4°F
(1.3°C)
121st Coolest
Coolest since:
1913, 1914, 1919
4th Warmest
Warmest to Date
2016, 2017
Jan 2011–Dec 2015
60-Month
46.3°F
(7.9°C)
44.4°F
(6.9°C)
1.9°F
(1.0°C)
119th Coolest
Coolest since:
1913
5th Warmest
Warmest to Date
2018

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