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 1930

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
December 1930
1-Month
24.4°F
(-4.2°C)
28.1°F
(-2.2°C)
-3.7°F
(-2.0°C)
20th Coolest
Coolest since:
1990
109th Warmest
Warmest since:
1917
Nov–Dec 1930
2-Month
28.1°F
(-2.2°C)
31.3°F
(-0.4°C)
-3.2°F
(-1.8°C)
10th Coolest
Coolest since:
1985
119th Warmest
Warmest since:
1917
Oct–Dec 1930
3-Month
33.2°F
(0.7°C)
36.2°F
(2.3°C)
-3.0°F
(-1.6°C)
7th Coolest
Coolest since:
1985
122nd Warmest
Warmest since:
1917
Ties: 1948
Sep–Dec 1930
4-Month
38.8°F
(3.8°C)
41.0°F
(5.0°C)
-2.2°F
(-1.2°C)
12th Coolest
Coolest since:
1985
117th Warmest
Warmest since:
1917
Ties: 1972
Aug–Dec 1930
5-Month
44.1°F
(6.7°C)
45.5°F
(7.5°C)
-1.4°F
(-0.8°C)
14th Coolest
Coolest since:
1985
115th Warmest
Warmest since:
1917, 2014
Ties: 1905, 1914, 1931
Jul–Dec 1930
6-Month
47.6°F
(8.7°C)
48.6°F
(9.2°C)
-1.0°F
(-0.5°C)
22nd Coolest
Coolest since:
1985
107th Warmest
Warmest since:
2014
Ties: 1905, 1932, 1964, 1971
Jun–Dec 1930
7-Month
48.7°F
(9.3°C)
49.8°F
(9.9°C)
-1.1°F
(-0.6°C)
19th Coolest
Coolest since:
1916
110th Warmest
Warmest since:
2021
Ties: 1905, 1955, 1964
May–Dec 1930
8-Month
48.6°F
(9.2°C)
49.8°F
(9.9°C)
-1.2°F
(-0.7°C)
13th Coolest
Coolest since:
1916
116th Warmest
Warmest since:
2021
Ties: 1902, 1905, 1964
Apr–Dec 1930
9-Month
48.5°F
(9.2°C)
49.0°F
(9.4°C)
-0.5°F
(-0.2°C)
34th Coolest
Coolest since:
1916
95th Warmest
Warmest since:
2021
Ties: 1914, 1921, 1932, 1954, 1959, 2011
Mar–Dec 1930
10-Month
47.3°F
(8.5°C)
47.6°F
(8.7°C)
-0.3°F
(-0.2°C)
40th Coolest
Coolest since:
1916
89th Warmest
Warmest since:
2015
Ties: 1905, 1921, 1968
Feb–Dec 1930
11-Month
46.2°F
(7.9°C)
46.1°F
(7.8°C)
0.1°F
(0.1°C)
58th Coolest
Coolest since:
1955
71st Warmest
Warmest since:
2015
Ties: 1907, 1918, 1931, 1936, 1968, 1969, 1989, 2008, 2019
Jan–Dec 1930
12-Month
43.5°F
(6.4°C)
44.5°F
(6.9°C)
-1.0°F
(-0.5°C)
22nd Coolest
Coolest since:
1916
107th Warmest
Warmest since:
2015
Ties: 1898, 1902, 1917, 1920, 1951
Jul 1929–Dec 1930
18-Month
45.3°F
(7.4°C)
45.8°F
(7.7°C)
-0.5°F
(-0.3°C)
28th Coolest
Coolest since:
1985
100th Warmest
Warmest since:
2015
Ties: 1927, 1933, 1957
Jan 1929–Dec 1930
24-Month
43.1°F
(6.2°C)
44.4°F
(6.9°C)
-1.3°F
(-0.7°C)
6th Coolest
Coolest since:
1917
122nd Warmest
Warmest since:
2015
Ties: 1949
Jan 1928–Dec 1930
36-Month
43.6°F
(6.4°C)
44.5°F
(6.9°C)
-0.9°F
(-0.5°C)
15th Coolest
Coolest since:
1913
112th Warmest
Warmest since:
2016
Ties: 1897, 1903, 1923, 1929
Jan 1927–Dec 1930
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, 1899, 1911, 1917, 1923, 1924, 1932, 1957
Jan 1926–Dec 1930
60-Month
44.1°F
(6.7°C)
44.4°F
(6.9°C)
-0.3°F
(-0.2°C)
33rd Coolest
Coolest since:
1913
92nd Warmest
Warmest since:
2018
Ties: 1906, 1910, 1925, 1949, 1953

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