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 1987

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Warmest/Coolest
Since
Record
May 1987
1-Month
63.5°F
(17.5°C)
60.7°F
(15.9°C)
2.8°F
(1.6°C)
102nd Coolest
Coolest since:
1977
27th Warmest
Warmest since:
2001
Ties: 2017
Apr–May 1987
2-Month
61.4°F
(16.3°C)
57.4°F
(14.1°C)
4.0°F
(2.2°C)
124th Coolest
Coolest since:
1967
5th Warmest
Warmest since:
1992
Ties: 2021
Mar–May 1987
3-Month
57.1°F
(13.9°C)
54.5°F
(12.5°C)
2.6°F
(1.4°C)
109th Coolest
Coolest since:
1917
20th Warmest
Warmest since:
1934
Ties: 2022
Feb–May 1987
4-Month
54.4°F
(12.4°C)
52.2°F
(11.2°C)
2.2°F
(1.2°C)
108th Coolest
Coolest since:
1917
21st Warmest
Warmest since:
1934
Jan–May 1987
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: 1928, 2003
Dec 1986–May 1987
6-Month
50.5°F
(10.3°C)
49.1°F
(9.5°C)
1.4°F
(0.8°C)
98th Coolest
Coolest since:
1917
30th Warmest
Warmest since:
2015
Ties: 1943, 2003
Nov 1986–May 1987
7-Month
50.7°F
(10.4°C)
49.1°F
(9.5°C)
1.6°F
(0.9°C)
101st Coolest
Coolest since:
1917
27th Warmest
Warmest since:
2015
Oct 1986–May 1987
8-Month
51.8°F
(11.0°C)
50.4°F
(10.2°C)
1.4°F
(0.8°C)
103rd Coolest
Coolest since:
1917
25th Warmest
Warmest since:
2015
Ties: 1931, 1951, 2002
Sep 1986–May 1987
9-Month
53.1°F
(11.7°C)
52.4°F
(11.3°C)
0.7°F
(0.4°C)
84th Coolest
Coolest since:
1917
44th Warmest
Warmest since:
2015
Ties: 1900, 1936
Aug 1986–May 1987
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: 1970, 1980, 1986, 2001
Jul 1986–May 1987
11-Month
57.0°F
(13.9°C)
56.4°F
(13.6°C)
0.6°F
(0.3°C)
84th Coolest
Coolest since:
1917
44th Warmest
Warmest since:
2015
Ties: 1918, 1931, 1990, 2001, 2008
Jun 1986–May 1987
12-Month
58.1°F
(14.5°C)
57.4°F
(14.1°C)
0.7°F
(0.4°C)
86th Coolest
Coolest since:
1917
42nd Warmest
Warmest since:
2015
Ties: 1930, 1938, 2008
Dec 1985–May 1987
18-Month
56.1°F
(13.4°C)
54.6°F
(12.6°C)
1.5°F
(0.8°C)
111th Coolest
Coolest since:
1917
16th Warmest
Warmest since:
2015
Ties: 1940, 1941, 1959, 2001, 2009, 2020
Jun 1985–May 1987
24-Month
58.4°F
(14.7°C)
57.4°F
(14.1°C)
1.0°F
(0.6°C)
99th Coolest
Coolest since:
1913, 1917
28th Warmest
Warmest since:
2015
Ties: 1940, 1959, 1981, 1982, 1989
Jun 1984–May 1987
36-Month
58.1°F
(14.5°C)
57.4°F
(14.1°C)
0.7°F
(0.4°C)
88th Coolest
Coolest since:
1913, 1917
38th Warmest
Warmest since:
2016
Ties: 1991
Jun 1983–May 1987
48-Month
58.2°F
(14.6°C)
57.4°F
(14.1°C)
0.8°F
(0.5°C)
89th Coolest
Coolest since:
1913
36th Warmest
Warmest since:
2016, 2017, 2018
Jun 1982–May 1987
60-Month
57.8°F
(14.3°C)
57.3°F
(14.1°C)
0.5°F
(0.2°C)
75th Coolest
Coolest since:
1913, 1917
49th Warmest
Warmest since:
2018
Ties: 1934, 1942

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