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.

California River Basin

Average Temperature Rankings, May 1928

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 1928
1-Month
64.3°F
(17.9°C)
60.7°F
(15.9°C)
3.6°F
(2.0°C)
114th Coolest
Coolest since:
1977
15th Warmest
Warmest since:
2001
Ties: 1973
Apr–May 1928
2-Month
59.0°F
(15.0°C)
57.4°F
(14.1°C)
1.6°F
(0.9°C)
92nd Coolest
Coolest since:
1967
37th Warmest
Warmest since:
1992
Ties: 1943, 1959
Mar–May 1928
3-Month
56.6°F
(13.7°C)
54.5°F
(12.5°C)
2.1°F
(1.2°C)
97th Coolest
Coolest since:
1917
32nd Warmest
Warmest since:
1934
Ties: 1939, 1990
Feb–May 1928
4-Month
53.9°F
(12.2°C)
52.2°F
(11.2°C)
1.7°F
(1.0°C)
102nd Coolest
Coolest since:
1917
27th Warmest
Warmest since:
1934
Ties: 1954, 1988, 2009, 2018
Jan–May 1928
5-Month
51.8°F
(11.0°C)
50.2°F
(10.1°C)
1.6°F
(0.9°C)
100th Coolest
Coolest since:
1917
29th Warmest
Warmest since:
2015
Ties: 1987, 2003
Dec 1927–May 1928
6-Month
50.1°F
(10.1°C)
49.1°F
(9.5°C)
1.0°F
(0.6°C)
90th Coolest
Coolest since:
1917
38th Warmest
Warmest since:
2015
Ties: 1914, 1980, 1990
Nov 1927–May 1928
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: 1947, 1970, 1994, 2001
Oct 1927–May 1928
8-Month
51.4°F
(10.8°C)
50.4°F
(10.2°C)
1.0°F
(0.6°C)
90th Coolest
Coolest since:
1917
38th Warmest
Warmest since:
2015
Ties: 1941, 1968, 1990, 2019
Sep 1927–May 1928
9-Month
52.9°F
(11.6°C)
52.4°F
(11.3°C)
0.5°F
(0.3°C)
77th Coolest
Coolest since:
1917
51st Warmest
Warmest since:
2015
Ties: 1924, 1926, 1960, 1963
Aug 1927–May 1928
10-Month
54.9°F
(12.7°C)
54.6°F
(12.6°C)
0.3°F
(0.1°C)
74th Coolest
Coolest since:
1917
54th Warmest
Warmest since:
2015
Ties: 1918, 1947, 1961
Jul 1927–May 1928
11-Month
56.7°F
(13.7°C)
56.4°F
(13.6°C)
0.3°F
(0.1°C)
72nd Coolest
Coolest since:
1917
56th Warmest
Warmest since:
2015
Ties: 1905, 1947, 1963, 2011
Jun 1927–May 1928
12-Month
57.7°F
(14.3°C)
57.4°F
(14.1°C)
0.3°F
(0.2°C)
72nd Coolest
Coolest since:
1917
56th Warmest
Warmest since:
2015
Ties: 1927, 1939, 1963, 1995, 2010, 2011
Dec 1926–May 1928
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, 1944, 1958, 1962, 2011
Jun 1926–May 1928
24-Month
57.7°F
(14.3°C)
57.4°F
(14.1°C)
0.3°F
(0.2°C)
75th Coolest
Coolest since:
1913, 1917
52nd Warmest
Warmest since:
2015
Ties: 1927, 1962, 1969, 2011
Jun 1925–May 1928
36-Month
57.7°F
(14.3°C)
57.3°F
(14.1°C)
0.4°F
(0.2°C)
74th Coolest
Coolest since:
1913, 1917
52nd Warmest
Warmest to Date
2016
Ties: 1963, 1978, 1984
Jun 1924–May 1928
48-Month
57.6°F
(14.2°C)
57.4°F
(14.1°C)
0.2°F
(0.1°C)
68th Coolest
Coolest since:
1913
57th Warmest
Warmest to Date
2016, 2017, 2018
Ties: 1939, 1971
Jun 1923–May 1928
60-Month
57.5°F
(14.2°C)
57.4°F
(14.1°C)
0.1°F
(0.1°C)
57th Coolest
Coolest since:
1913, 1917
67th Warmest
Warmest to Date
2018
Ties: 1930, 1931, 1939, 1954, 1970, 1971, 1972, 1978

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