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 1988

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Warmest/Coolest
Since
Record
May 1988
1-Month
60.3°F
(15.7°C)
60.7°F
(15.9°C)
-0.4°F
(-0.2°C)
44th Coolest
Coolest since:
1977
85th Warmest
Warmest since:
2001
Apr–May 1988
2-Month
57.8°F
(14.3°C)
57.4°F
(14.1°C)
0.4°F
(0.2°C)
68th Coolest
Coolest since:
1967
61st Warmest
Warmest since:
1992
Ties: 1898, 1925
Mar–May 1988
3-Month
55.7°F
(13.2°C)
54.5°F
(12.5°C)
1.2°F
(0.7°C)
89th Coolest
Coolest since:
1917
40th Warmest
Warmest since:
1934
Ties: 1954, 1981
Feb–May 1988
4-Month
53.9°F
(12.2°C)
52.2°F
(11.2°C)
1.7°F
(1.0°C)
101st Coolest
Coolest since:
1917
28th Warmest
Warmest since:
1934
Ties: 1928, 2009, 2018
Jan–May 1988
5-Month
51.7°F
(10.9°C)
50.2°F
(10.1°C)
1.5°F
(0.8°C)
97th Coolest
Coolest since:
1917
32nd Warmest
Warmest since:
2015
Ties: 1900, 1914, 1943, 1954, 2001
Dec 1987–May 1988
6-Month
49.9°F
(9.9°C)
49.1°F
(9.5°C)
0.8°F
(0.4°C)
83rd Coolest
Coolest since:
1917
45th Warmest
Warmest since:
2015
Ties: 1951, 1989, 2002
Nov 1987–May 1988
7-Month
49.8°F
(9.9°C)
49.1°F
(9.5°C)
0.7°F
(0.4°C)
77th Coolest
Coolest since:
1917
51st Warmest
Warmest since:
2015
Ties: 1980
Oct 1987–May 1988
8-Month
51.6°F
(10.9°C)
50.4°F
(10.2°C)
1.2°F
(0.7°C)
96th Coolest
Coolest since:
1917
32nd Warmest
Warmest since:
2015
Ties: 1926, 1954, 1994, 2006
Sep 1987–May 1988
9-Month
53.6°F
(12.0°C)
52.4°F
(11.3°C)
1.2°F
(0.7°C)
100th Coolest
Coolest since:
1917
28th Warmest
Warmest since:
2015
Ties: 1951, 1968, 1980, 1994
Aug 1987–May 1988
10-Month
55.7°F
(13.2°C)
54.6°F
(12.6°C)
1.1°F
(0.6°C)
99th Coolest
Coolest since:
1917
29th Warmest
Warmest since:
2015
Ties: 1951
Jul 1987–May 1988
11-Month
57.1°F
(13.9°C)
56.4°F
(13.6°C)
0.7°F
(0.3°C)
90th Coolest
Coolest since:
1917
38th Warmest
Warmest since:
2015
Ties: 1938, 1960, 1980, 1994, 2005
Jun 1987–May 1988
12-Month
58.2°F
(14.6°C)
57.4°F
(14.1°C)
0.8°F
(0.5°C)
92nd Coolest
Coolest since:
1917
36th Warmest
Warmest since:
2015
Ties: 1941, 1980, 1982, 1993, 2005
Dec 1986–May 1988
18-Month
55.7°F
(13.2°C)
54.6°F
(12.6°C)
1.1°F
(0.6°C)
96th Coolest
Coolest since:
1917
31st Warmest
Warmest since:
2015
Ties: 1989, 2000, 2006
Jun 1986–May 1988
24-Month
58.2°F
(14.6°C)
57.4°F
(14.1°C)
0.8°F
(0.5°C)
90th Coolest
Coolest since:
1913, 1917
37th Warmest
Warmest since:
2015
Ties: 2000
Jun 1985–May 1988
36-Month
58.3°F
(14.6°C)
57.4°F
(14.1°C)
0.9°F
(0.5°C)
95th Coolest
Coolest since:
1913, 1917
31st Warmest
Warmest since:
2016
Ties: 1940, 1982, 1989, 1990
Jun 1984–May 1988
48-Month
58.1°F
(14.5°C)
57.4°F
(14.1°C)
0.7°F
(0.4°C)
88th Coolest
Coolest since:
1913
37th Warmest
Warmest since:
2016, 2017, 2018
Ties: 1981, 1991
Jun 1983–May 1988
60-Month
58.2°F
(14.6°C)
57.3°F
(14.1°C)
0.9°F
(0.5°C)
93rd Coolest
Coolest since:
1913, 1917
31st Warmest
Warmest to Date
2018
Ties: 1989, 1995

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