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 1970

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 1970
1-Month
62.7°F
(17.1°C)
60.7°F
(15.9°C)
2.0°F
(1.2°C)
94th Coolest
Coolest since:
1977
35th Warmest
Warmest since:
2001
Ties: 1937
Apr–May 1970
2-Month
56.3°F
(13.5°C)
57.4°F
(14.1°C)
-1.1°F
(-0.6°C)
39th Coolest
Coolest since:
1967
90th Warmest
Warmest since:
1992
Ties: 1978
Mar–May 1970
3-Month
54.0°F
(12.2°C)
54.5°F
(12.5°C)
-0.5°F
(-0.3°C)
50th Coolest
Coolest since:
1917
79th Warmest
Warmest since:
1934
Ties: 1905, 1915, 1958, 1961
Feb–May 1970
4-Month
52.6°F
(11.4°C)
52.2°F
(11.2°C)
0.4°F
(0.2°C)
71st Coolest
Coolest since:
1917
58th Warmest
Warmest since:
1934
Ties: 1907, 1939, 1958
Jan–May 1970
5-Month
51.0°F
(10.6°C)
50.2°F
(10.1°C)
0.8°F
(0.5°C)
79th Coolest
Coolest since:
1917
50th Warmest
Warmest since:
2015
Ties: 1905
Dec 1969–May 1970
6-Month
50.0°F
(10.0°C)
49.1°F
(9.5°C)
0.9°F
(0.5°C)
86th Coolest
Coolest since:
1917
42nd Warmest
Warmest since:
2015
Ties: 1930, 2006
Nov 1969–May 1970
7-Month
50.2°F
(10.1°C)
49.1°F
(9.5°C)
1.1°F
(0.6°C)
93rd Coolest
Coolest since:
1917
35th Warmest
Warmest since:
2015
Ties: 1928, 1947, 1994, 2001
Oct 1969–May 1970
8-Month
50.9°F
(10.5°C)
50.4°F
(10.2°C)
0.5°F
(0.3°C)
76th Coolest
Coolest since:
1917
52nd Warmest
Warmest since:
2015
Ties: 1924, 1936, 1938, 1963
Sep 1969–May 1970
9-Month
53.2°F
(11.8°C)
52.4°F
(11.3°C)
0.8°F
(0.5°C)
88th Coolest
Coolest since:
1917
40th Warmest
Warmest since:
2015
Ties: 1930, 1993, 2001
Aug 1969–May 1970
10-Month
55.4°F
(13.0°C)
54.6°F
(12.6°C)
0.8°F
(0.4°C)
90th Coolest
Coolest since:
1917
38th Warmest
Warmest since:
2015
Ties: 1980, 1986, 1987, 2001
Jul 1969–May 1970
11-Month
57.2°F
(14.0°C)
56.4°F
(13.6°C)
0.8°F
(0.4°C)
94th Coolest
Coolest since:
1917
34th Warmest
Warmest since:
2015
Ties: 1914, 1930, 1993
Jun 1969–May 1970
12-Month
58.0°F
(14.4°C)
57.4°F
(14.1°C)
0.6°F
(0.3°C)
82nd Coolest
Coolest since:
1917
46th Warmest
Warmest since:
2015
Ties: 1918, 1931, 1936, 1954, 1990, 1994
Dec 1968–May 1970
18-Month
54.7°F
(12.6°C)
54.6°F
(12.6°C)
0.1°F
(0.0°C)
66th Coolest
Coolest since:
1917
61st Warmest
Warmest since:
2015
Ties: 1937, 1947, 1971
Jun 1968–May 1970
24-Month
57.5°F
(14.2°C)
57.4°F
(14.1°C)
0.1°F
(0.1°C)
61st Coolest
Coolest since:
1913, 1917
66th Warmest
Warmest since:
2015
Ties: 1905, 1919, 1947, 1952, 1971, 1980, 1984
Jun 1967–May 1970
36-Month
57.8°F
(14.3°C)
57.4°F
(14.1°C)
0.4°F
(0.2°C)
79th Coolest
Coolest since:
1913, 1917
47th Warmest
Warmest since:
2016
Ties: 1935, 1942, 1983, 2000
Jun 1966–May 1970
48-Month
57.7°F
(14.3°C)
57.4°F
(14.1°C)
0.3°F
(0.2°C)
72nd Coolest
Coolest since:
1913
53rd Warmest
Warmest since:
2016, 2017, 2018
Ties: 1934, 1980, 1985
Jun 1965–May 1970
60-Month
57.5°F
(14.2°C)
57.3°F
(14.1°C)
0.2°F
(0.1°C)
57th Coolest
Coolest since:
1913, 1917
67th Warmest
Warmest since:
2018
Ties: 1928, 1930, 1931, 1939, 1954, 1971, 1972, 1978

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