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 1956

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Warmest/Coolest
Since
Record
May 1956
1-Month
60.8°F
(16.0°C)
60.7°F
(15.9°C)
0.1°F
(0.1°C)
53rd Coolest
Coolest since:
1977
76th Warmest
Warmest since:
2001
Ties: 1975, 2015
Apr–May 1956
2-Month
57.0°F
(13.9°C)
57.4°F
(14.1°C)
-0.4°F
(-0.2°C)
54th Coolest
Coolest since:
1967
75th Warmest
Warmest since:
1992
Ties: 1961, 1974, 1976, 1982
Mar–May 1956
3-Month
54.3°F
(12.4°C)
54.5°F
(12.5°C)
-0.2°F
(-0.1°C)
57th Coolest
Coolest since:
1917
72nd Warmest
Warmest since:
1934
Ties: 1895, 1897, 1919
Feb–May 1956
4-Month
50.9°F
(10.5°C)
52.2°F
(11.2°C)
-1.3°F
(-0.7°C)
25th Coolest
Coolest since:
1917
104th Warmest
Warmest since:
1934
Ties: 1899, 1920, 1938, 1949, 2010
Jan–May 1956
5-Month
49.6°F
(9.8°C)
50.2°F
(10.1°C)
-0.6°F
(-0.3°C)
36th Coolest
Coolest since:
1917
93rd Warmest
Warmest since:
2015
Ties: 1901, 1920, 1923, 1938, 1982
Dec 1955–May 1956
6-Month
48.9°F
(9.4°C)
49.1°F
(9.5°C)
-0.2°F
(-0.1°C)
51st Coolest
Coolest since:
1917
77th Warmest
Warmest since:
2015
Ties: 1907, 1916, 1957, 1983, 1985
Nov 1955–May 1956
7-Month
48.8°F
(9.3°C)
49.1°F
(9.5°C)
-0.3°F
(-0.2°C)
50th Coolest
Coolest since:
1917
78th Warmest
Warmest since:
2015
Ties: 1916, 1974, 2010
Oct 1955–May 1956
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, 1958
Sep 1955–May 1956
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, 1958, 1965
Aug 1955–May 1956
10-Month
54.7°F
(12.6°C)
54.6°F
(12.6°C)
0.1°F
(0.0°C)
63rd Coolest
Coolest since:
1917
65th Warmest
Warmest since:
2015
Ties: 1900, 1939, 1966, 2010, 2011
Jul 1955–May 1956
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, 1958
Jun 1955–May 1956
12-Month
57.1°F
(13.9°C)
57.4°F
(14.1°C)
-0.3°F
(-0.2°C)
39th Coolest
Coolest since:
1917
89th Warmest
Warmest since:
2015
Ties: 1923, 1924, 1925, 1957, 1966, 1967, 1977, 1998, 1999
Dec 1954–May 1956
18-Month
53.6°F
(12.0°C)
54.6°F
(12.6°C)
-1.0°F
(-0.6°C)
10th Coolest
Coolest since:
1917
117th Warmest
Warmest since:
2015
Ties: 1918, 1922, 1923, 1945
Jun 1954–May 1956
24-Month
56.5°F
(13.6°C)
57.4°F
(14.1°C)
-0.9°F
(-0.5°C)
12th Coolest
Coolest since:
1913, 1917
115th Warmest
Warmest since:
2015
Ties: 1904, 1945
Jun 1953–May 1956
36-Month
57.0°F
(13.9°C)
57.4°F
(14.1°C)
-0.4°F
(-0.2°C)
31st Coolest
Coolest since:
1913, 1917
95th Warmest
Warmest since:
2016
Ties: 1901, 1902, 1944, 1948, 1955, 1974
Jun 1952–May 1956
48-Month
57.0°F
(13.9°C)
57.4°F
(14.1°C)
-0.4°F
(-0.2°C)
32nd Coolest
Coolest since:
1913
93rd Warmest
Warmest since:
2016, 2017, 2018
Ties: 1900, 1902, 1908, 1947, 1957, 1967, 1974, 1975, 1976
Jun 1951–May 1956
60-Month
56.9°F
(13.8°C)
57.3°F
(14.1°C)
-0.4°F
(-0.3°C)
26th Coolest
Coolest since:
1913, 1917
98th Warmest
Warmest since:
2018
Ties: 1900, 1901, 1906, 1907, 1951, 1953

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