Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. 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.

California River Basin

Average Temperature Rankings, May 1920

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 1920
1-Month
60.4°F
(15.8°C)
60.7°F
(15.9°C)
-0.3°F
(-0.1°C)
45th Coolest
Coolest since:
1977
84th Warmest
Warmest since:
2001
Ties: 1913, 1932, 1999
Apr–May 1920
2-Month
56.2°F
(13.4°C)
57.4°F
(14.1°C)
-1.2°F
(-0.7°C)
38th Coolest
Coolest since:
1967
91st Warmest
Warmest since:
1992
Mar–May 1920
3-Month
52.7°F
(11.5°C)
54.5°F
(12.5°C)
-1.8°F
(-1.0°C)
20th Coolest
Coolest since:
1917
109th Warmest
Warmest since:
1934
Ties: 1906, 1935, 1942
Feb–May 1920
4-Month
50.9°F
(10.5°C)
52.2°F
(11.2°C)
-1.3°F
(-0.7°C)
25th Coolest
Coolest since:
1917
104th Warmest
Warmest since:
1934
Ties: 1899, 1938, 1949, 1956, 2010
Jan–May 1920
5-Month
49.6°F
(9.8°C)
50.2°F
(10.1°C)
-0.6°F
(-0.3°C)
36th Coolest
Coolest since:
1917
93rd Warmest
Warmest since:
2015
Ties: 1901, 1923, 1938, 1956, 1982
Dec 1919–May 1920
6-Month
48.3°F
(9.1°C)
49.1°F
(9.5°C)
-0.8°F
(-0.4°C)
34th Coolest
Coolest since:
1917
94th Warmest
Warmest since:
2015
Ties: 1935
Nov 1919–May 1920
7-Month
48.2°F
(9.0°C)
49.1°F
(9.5°C)
-0.9°F
(-0.5°C)
23rd Coolest
Coolest since:
1917
105th Warmest
Warmest since:
2015
Ties: 1899, 1923, 1945, 1953, 1971
Oct 1919–May 1920
8-Month
49.0°F
(9.4°C)
50.4°F
(10.2°C)
-1.4°F
(-0.8°C)
14th Coolest
Coolest since:
1917
114th Warmest
Warmest since:
2015
Ties: 1973, 1975
Sep 1919–May 1920
9-Month
51.0°F
(10.6°C)
52.4°F
(11.3°C)
-1.4°F
(-0.7°C)
11th Coolest
Coolest since:
1917
117th Warmest
Warmest since:
2015
Ties: 1929, 1973
Aug 1919–May 1920
10-Month
53.3°F
(11.8°C)
54.6°F
(12.6°C)
-1.3°F
(-0.8°C)
13th Coolest
Coolest since:
1917
115th Warmest
Warmest since:
2015
Ties: 1932, 1973
Jul 1919–May 1920
11-Month
55.3°F
(12.9°C)
56.4°F
(13.6°C)
-1.1°F
(-0.7°C)
13th Coolest
Coolest since:
1917
115th Warmest
Warmest since:
2015
Ties: 1898
Jun 1919–May 1920
12-Month
56.3°F
(13.5°C)
57.4°F
(14.1°C)
-1.1°F
(-0.6°C)
13th Coolest
Coolest since:
1917
115th Warmest
Warmest since:
2015
Ties: 1909, 1922
Dec 1918–May 1920
18-Month
53.5°F
(11.9°C)
54.6°F
(12.6°C)
-1.1°F
(-0.7°C)
8th Coolest
Coolest since:
1917
119th Warmest
Warmest since:
2015
Ties: 1950
Jun 1918–May 1920
24-Month
56.6°F
(13.7°C)
57.4°F
(14.1°C)
-0.8°F
(-0.4°C)
15th Coolest
Coolest since:
1913, 1917
112th Warmest
Warmest since:
2015
Ties: 1899, 1910, 1914
Jun 1917–May 1920
36-Month
57.1°F
(13.9°C)
57.4°F
(14.1°C)
-0.3°F
(-0.2°C)
38th Coolest
Coolest since:
1913, 1917
88th Warmest
Warmest since:
2016
Ties: 1916, 1925, 1945, 1964, 1965, 1976, 1977
Jun 1916–May 1920
48-Month
56.3°F
(13.5°C)
57.4°F
(14.1°C)
-1.1°F
(-0.6°C)
2nd Coolest
Coolest since:
1913
123rd Warmest
Warmest since:
2016, 2017, 2018
Ties: 1912, 1914, 1915, 1917, 1918
Jun 1915–May 1920
60-Month
56.4°F
(13.6°C)
57.3°F
(14.1°C)
-0.9°F
(-0.5°C)
5th Coolest
Coolest since:
1913, 1917
119th Warmest
Warmest since:
2018
Ties: 1914, 1915, 1916

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