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 1958

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 1958
1-Month
64.0°F
(17.8°C)
60.7°F
(15.9°C)
3.3°F
(1.9°C)
111th Coolest
Coolest since:
1977
18th Warmest
Warmest since:
2001
Apr–May 1958
2-Month
58.6°F
(14.8°C)
57.4°F
(14.1°C)
1.2°F
(0.7°C)
81st Coolest
Coolest since:
1967
48th Warmest
Warmest since:
1992
Ties: 1950, 1969, 1994
Mar–May 1958
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, 1961, 1970
Feb–May 1958
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, 1970
Jan–May 1958
5-Month
50.9°F
(10.5°C)
50.2°F
(10.1°C)
0.7°F
(0.4°C)
77th Coolest
Coolest since:
1917
52nd Warmest
Warmest since:
2015
Ties: 1910, 1966, 1980
Dec 1957–May 1958
6-Month
49.8°F
(9.9°C)
49.1°F
(9.5°C)
0.7°F
(0.4°C)
79th Coolest
Coolest since:
1917
49th Warmest
Warmest since:
2015
Ties: 1939
Nov 1957–May 1958
7-Month
49.4°F
(9.7°C)
49.1°F
(9.5°C)
0.3°F
(0.2°C)
71st Coolest
Coolest since:
1917
57th Warmest
Warmest since:
2015
Ties: 1938, 1966, 1993
Oct 1957–May 1958
8-Month
50.3°F
(10.2°C)
50.4°F
(10.2°C)
-0.1°F
(0.0°C)
56th Coolest
Coolest since:
1917
72nd Warmest
Warmest since:
2015
Ties: 1916, 1946, 1950, 1956
Sep 1957–May 1958
9-Month
52.4°F
(11.3°C)
52.4°F
(11.3°C)
0.0°F
(0.0°C)
55th Coolest
Coolest since:
1917
73rd Warmest
Warmest since:
2015
Ties: 1946, 1953, 1956, 1965
Aug 1957–May 1958
10-Month
54.4°F
(12.4°C)
54.6°F
(12.6°C)
-0.2°F
(-0.2°C)
48th Coolest
Coolest since:
1917
80th Warmest
Warmest since:
2015
Ties: 1950, 1967, 1972, 1991, 1999
Jul 1957–May 1958
11-Month
56.2°F
(13.4°C)
56.4°F
(13.6°C)
-0.2°F
(-0.2°C)
49th Coolest
Coolest since:
1917
79th Warmest
Warmest since:
2015
Ties: 1950, 1956
Jun 1957–May 1958
12-Month
57.5°F
(14.2°C)
57.4°F
(14.1°C)
0.1°F
(0.1°C)
64th Coolest
Coolest since:
1917
64th Warmest
Warmest since:
2015
Ties: 1900, 1985, 1991
Dec 1956–May 1958
18-Month
54.6°F
(12.6°C)
54.6°F
(12.6°C)
0.0°F
(0.0°C)
57th Coolest
Coolest since:
1917
70th Warmest
Warmest since:
2015
Ties: 1925, 1928, 1944, 1962, 2011
Jun 1956–May 1958
24-Month
57.3°F
(14.1°C)
57.4°F
(14.1°C)
-0.1°F
(0.0°C)
53rd Coolest
Coolest since:
1913, 1917
74th Warmest
Warmest since:
2015
Jun 1955–May 1958
36-Month
57.2°F
(14.0°C)
57.4°F
(14.1°C)
-0.2°F
(-0.1°C)
46th Coolest
Coolest since:
1913, 1917
80th Warmest
Warmest since:
2016
Ties: 1906, 1907, 1929, 1947, 1967
Jun 1954–May 1958
48-Month
56.9°F
(13.8°C)
57.4°F
(14.1°C)
-0.5°F
(-0.3°C)
26th Coolest
Coolest since:
1913
99th Warmest
Warmest since:
2016, 2017, 2018
Ties: 1905, 1906, 1925, 1948, 1955
Jun 1953–May 1958
60-Month
57.1°F
(13.9°C)
57.3°F
(14.1°C)
-0.2°F
(-0.2°C)
40th Coolest
Coolest since:
1913, 1917
84th Warmest
Warmest since:
2018
Ties: 1926, 1945, 1966, 1967, 1973

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