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 1899

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 1899
1-Month
27.8°F
(-2.3°C)
28.1°F
(-2.2°C)
-0.3°F
(-0.1°C)
52nd Coolest
Coolest since:
1990
77th Warmest
Warmest since:
1917
Ties: 1912, 1935, 1982, 2001
Nov–Dec 1899
2-Month
33.7°F
(0.9°C)
31.3°F
(-0.4°C)
2.4°F
(1.3°C)
106th Coolest
Coolest since:
1985
23rd Warmest
Warmest to Date
1917
Oct–Dec 1899
3-Month
36.6°F
(2.6°C)
36.2°F
(2.3°C)
0.4°F
(0.3°C)
72nd Coolest
Coolest since:
1985
57th Warmest
Warmest to Date
1917
Ties: 1944, 1949, 2017
Sep–Dec 1899
4-Month
41.7°F
(5.4°C)
41.1°F
(5.1°C)
0.6°F
(0.3°C)
72nd Coolest
Coolest since:
1985
57th Warmest
Warmest to Date
1917
Ties: 1957
Aug–Dec 1899
5-Month
44.8°F
(7.1°C)
45.4°F
(7.4°C)
-0.6°F
(-0.3°C)
36th Coolest
Coolest since:
1985
93rd Warmest
Warmest since:
1917, 2014
Ties: 1908, 1956, 1983, 2000
Jul–Dec 1899
6-Month
48.0°F
(8.9°C)
48.6°F
(9.2°C)
-0.6°F
(-0.3°C)
36th Coolest
Coolest since:
1985
93rd Warmest
Warmest since:
2014
Ties: 1897, 1928, 1959
Jun–Dec 1899
7-Month
49.0°F
(9.4°C)
49.8°F
(9.9°C)
-0.8°F
(-0.5°C)
24th Coolest
Coolest since:
1916
105th Warmest
Warmest since:
2021
Ties: 1903, 1913, 1928, 1946, 1954, 1982
May–Dec 1899
8-Month
48.5°F
(9.2°C)
49.8°F
(9.9°C)
-1.3°F
(-0.7°C)
11th Coolest
Coolest since:
1916
118th Warmest
Warmest since:
2021
Ties: 1955
Apr–Dec 1899
9-Month
47.6°F
(8.7°C)
49.0°F
(9.4°C)
-1.4°F
(-0.7°C)
11th Coolest
Coolest since:
1916
118th Warmest
Warmest since:
2021
Ties: 1964
Mar–Dec 1899
10-Month
46.2°F
(7.9°C)
47.7°F
(8.7°C)
-1.5°F
(-0.8°C)
8th Coolest
Coolest since:
1916
121st Warmest
Warmest since:
2015
Feb–Dec 1899
11-Month
44.2°F
(6.8°C)
46.1°F
(7.8°C)
-1.9°F
(-1.0°C)
5th Coolest
Coolest since:
1955
124th Warmest
Warmest since:
2015
Ties: 1948
Jan–Dec 1899
12-Month
42.9°F
(6.1°C)
44.4°F
(6.9°C)
-1.5°F
(-0.8°C)
9th Coolest
Coolest since:
1916
120th Warmest
Warmest since:
2015
Ties: 1895
Jul 1898–Dec 1899
18-Month
44.4°F
(6.9°C)
45.9°F
(7.7°C)
-1.5°F
(-0.8°C)
9th Coolest
Coolest since:
1985
119th Warmest
Warmest since:
2015
Ties: 1920
Jan 1898–Dec 1899
24-Month
43.2°F
(6.2°C)
44.4°F
(6.9°C)
-1.2°F
(-0.7°C)
8th Coolest
Coolest since:
1917
120th Warmest
Warmest since:
2015
Ties: 1903, 1916, 1923, 1955
Jan 1897–Dec 1899
36-Month
43.5°F
(6.4°C)
44.4°F
(6.9°C)
-0.9°F
(-0.5°C)
9th Coolest
Coolest since:
1913
118th Warmest
Warmest since:
2016
Ties: 1911, 1914, 1922, 1951, 1985
Jan 1896–Dec 1899
48-Month
43.6°F
(6.4°C)
44.4°F
(6.9°C)
-0.8°F
(-0.5°C)
9th Coolest
Coolest since:
1913, 1914, 1919
117th Warmest
Warmest since:
2016, 2017
Ties: 1898, 1911, 1917, 1923, 1924, 1930, 1932, 1957
Jan 1895–Dec 1899
60-Month
43.5°F
(6.4°C)
44.4°F
(6.9°C)
-0.9°F
(-0.5°C)
4th Coolest
Coolest since:
1913
121st Warmest
Warmest to Date
2018
Ties: 1912, 1914, 1917, 1923, 1952

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