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 1989

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2023)
Warmest/Coolest
Since
Record
May 1989
1-Month
61.5°F
(16.4°C)
60.7°F
(15.9°C)
0.8°F
(0.5°C)
73rd Coolest
Coolest since:
1977
57th Warmest
Warmest since:
2001
Ties: 1925, 2002
Apr–May 1989
2-Month
60.8°F
(16.0°C)
57.4°F
(14.1°C)
3.4°F
(1.9°C)
120th Coolest
Coolest since:
1967
10th Warmest
Warmest since:
1992
Ties: 1966
Mar–May 1989
3-Month
57.7°F
(14.3°C)
54.5°F
(12.5°C)
3.2°F
(1.8°C)
118th Coolest
Coolest since:
1917
12th Warmest
Warmest since:
1934
Ties: 2001
Feb–May 1989
4-Month
54.0°F
(12.2°C)
52.2°F
(11.2°C)
1.8°F
(1.0°C)
105th Coolest
Coolest since:
1917
25th Warmest
Warmest since:
1934
Ties: 1910, 1954
Jan–May 1989
5-Month
51.4°F
(10.8°C)
50.2°F
(10.1°C)
1.2°F
(0.7°C)
91st Coolest
Coolest since:
1917
39th Warmest
Warmest since:
2015
Ties: 1972, 1978
Dec 1988–May 1989
6-Month
49.9°F
(9.9°C)
49.1°F
(9.5°C)
0.8°F
(0.4°C)
84th Coolest
Coolest since:
1917
45th Warmest
Warmest since:
2015
Ties: 1951, 1988, 2002
Nov 1988–May 1989
7-Month
49.9°F
(9.9°C)
49.1°F
(9.5°C)
0.8°F
(0.4°C)
80th Coolest
Coolest since:
1917
49th Warmest
Warmest since:
2015
Ties: 1905
Oct 1988–May 1989
8-Month
51.7°F
(10.9°C)
50.4°F
(10.2°C)
1.3°F
(0.7°C)
100th Coolest
Coolest since:
1917
29th Warmest
Warmest since:
2015
Ties: 1943, 2012
Sep 1988–May 1989
9-Month
53.7°F
(12.1°C)
52.4°F
(11.3°C)
1.3°F
(0.8°C)
103rd Coolest
Coolest since:
1917
26th Warmest
Warmest since:
2015
Ties: 1954
Aug 1988–May 1989
10-Month
55.8°F
(13.2°C)
54.6°F
(12.6°C)
1.2°F
(0.6°C)
102nd Coolest
Coolest since:
1917
27th Warmest
Warmest since:
2015
Ties: 2019
Jul 1988–May 1989
11-Month
57.7°F
(14.3°C)
56.4°F
(13.6°C)
1.3°F
(0.7°C)
103rd Coolest
Coolest since:
1917
26th Warmest
Warmest since:
2015
Ties: 1978
Jun 1988–May 1989
12-Month
58.6°F
(14.8°C)
57.4°F
(14.1°C)
1.2°F
(0.7°C)
105th Coolest
Coolest since:
1917
24th Warmest
Warmest since:
2015
Ties: 1968, 1981, 1986, 2023
Dec 1987–May 1989
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
32nd Warmest
Warmest since:
2015
Ties: 1988, 2000, 2006
Jun 1987–May 1989
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
29th Warmest
Warmest since:
2015
Ties: 1940, 1959, 1981, 1982, 1987
Jun 1986–May 1989
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
32nd Warmest
Warmest since:
2016
Ties: 1940, 1982, 1988, 1990
Jun 1985–May 1989
48-Month
58.4°F
(14.7°C)
57.4°F
(14.1°C)
1.0°F
(0.6°C)
104th Coolest
Coolest since:
1913
22nd Warmest
Warmest to Date
2016, 2017, 2018
Ties: 1995, 1996, 1999, 2002, 2012, 2013
Jun 1984–May 1989
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
32nd Warmest
Warmest since:
2018
Ties: 1988, 1995

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