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 1925

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 1925
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
56th Warmest
Warmest since:
2001
Ties: 1989, 2002
Apr–May 1925
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, 1988
Mar–May 1925
3-Month
55.1°F
(12.8°C)
54.5°F
(12.5°C)
0.6°F
(0.3°C)
77th Coolest
Coolest since:
1917
52nd Warmest
Warmest since:
1934
Ties: 1946, 1978, 1979
Feb–May 1925
4-Month
53.2°F
(11.8°C)
52.2°F
(11.2°C)
1.0°F
(0.6°C)
84th Coolest
Coolest since:
1917
45th Warmest
Warmest since:
1934
Ties: 1900, 1990
Jan–May 1925
5-Month
51.1°F
(10.6°C)
50.2°F
(10.1°C)
0.9°F
(0.5°C)
82nd Coolest
Coolest since:
1917
47th Warmest
Warmest since:
2015
Ties: 1990, 1993
Dec 1924–May 1925
6-Month
49.3°F
(9.6°C)
49.1°F
(9.5°C)
0.2°F
(0.1°C)
70th Coolest
Coolest since:
1917
58th Warmest
Warmest since:
2015
Ties: 1963, 1972, 1993
Nov 1924–May 1925
7-Month
49.3°F
(9.6°C)
49.1°F
(9.5°C)
0.2°F
(0.1°C)
67th Coolest
Coolest since:
1917
61st Warmest
Warmest since:
2015
Ties: 1904, 1927, 1939, 1950, 1961
Oct 1924–May 1925
8-Month
50.1°F
(10.1°C)
50.4°F
(10.2°C)
-0.3°F
(-0.1°C)
43rd Coolest
Coolest since:
1917
85th Warmest
Warmest since:
2015
Ties: 1897, 1902, 1908, 1910, 1935, 1957, 1974, 1991
Sep 1924–May 1925
9-Month
52.1°F
(11.2°C)
52.4°F
(11.3°C)
-0.3°F
(-0.1°C)
46th Coolest
Coolest since:
1917
82nd Warmest
Warmest since:
2015
Ties: 1944
Aug 1924–May 1925
10-Month
54.2°F
(12.3°C)
54.6°F
(12.6°C)
-0.4°F
(-0.3°C)
41st Coolest
Coolest since:
1917
87th Warmest
Warmest since:
2015
Ties: 1957, 1974, 1977
Jul 1924–May 1925
11-Month
55.9°F
(13.3°C)
56.4°F
(13.6°C)
-0.5°F
(-0.3°C)
36th Coolest
Coolest since:
1917
92nd Warmest
Warmest since:
2015
Ties: 1944, 1971
Jun 1924–May 1925
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, 1956, 1957, 1966, 1967, 1977, 1998, 1999
Dec 1923–May 1925
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: 1928, 1944, 1958, 1962, 2011
Jun 1923–May 1925
24-Month
57.1°F
(13.9°C)
57.4°F
(14.1°C)
-0.3°F
(-0.2°C)
36th Coolest
Coolest since:
1913, 1917
91st Warmest
Warmest since:
2015
Ties: 1924, 1930, 1942, 1957, 1964, 1967, 1972, 1975, 1976, 1977, 1999
Jun 1922–May 1925
36-Month
57.1°F
(13.9°C)
57.4°F
(14.1°C)
-0.3°F
(-0.2°C)
38th Coolest
Coolest since:
1913, 1917
88th Warmest
Warmest since:
2016
Ties: 1916, 1920, 1945, 1964, 1965, 1976, 1977
Jun 1921–May 1925
48-Month
56.9°F
(13.8°C)
57.4°F
(14.1°C)
-0.5°F
(-0.3°C)
26th Coolest
Coolest since:
1913
99th Warmest
Warmest since:
2016, 2017, 2018
Ties: 1905, 1906, 1948, 1955, 1958
Jun 1920–May 1925
60-Month
56.7°F
(13.7°C)
57.3°F
(14.1°C)
-0.6°F
(-0.4°C)
16th Coolest
Coolest since:
1913, 1917
108th Warmest
Warmest since:
2018
Ties: 1903, 1922, 1950, 1952

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