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 1961

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
May 1961
1-Month
58.5°F
(14.7°C)
60.7°F
(15.9°C)
-2.2°F
(-1.2°C)
27th Coolest
Coolest since:
1977
102nd Warmest
Warmest since:
2001
Ties: 1909
Apr–May 1961
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: 1956, 1974, 1976, 1982
Mar–May 1961
3-Month
54.0°F
(12.2°C)
54.5°F
(12.5°C)
-0.5°F
(-0.3°C)
50th Coolest
Coolest since:
1917
79th Warmest
Warmest since:
1934
Ties: 1905, 1915, 1958, 1970
Feb–May 1961
4-Month
52.4°F
(11.3°C)
52.2°F
(11.2°C)
0.2°F
(0.1°C)
67th Coolest
Coolest since:
1917
62nd Warmest
Warmest since:
1934
Ties: 1904, 1963, 2006
Jan–May 1961
5-Month
50.7°F
(10.4°C)
50.2°F
(10.1°C)
0.5°F
(0.3°C)
72nd Coolest
Coolest since:
1917
57th Warmest
Warmest since:
2015
Ties: 2008
Dec 1960–May 1961
6-Month
49.5°F
(9.7°C)
49.1°F
(9.5°C)
0.4°F
(0.2°C)
73rd Coolest
Coolest since:
1917
55th Warmest
Warmest since:
2015
Nov 1960–May 1961
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, 1925, 1927, 1939, 1950
Oct 1960–May 1961
8-Month
50.5°F
(10.3°C)
50.4°F
(10.2°C)
0.1°F
(0.1°C)
65th Coolest
Coolest since:
1917
63rd Warmest
Warmest since:
2015
Ties: 1977
Sep 1960–May 1961
9-Month
52.8°F
(11.6°C)
52.4°F
(11.3°C)
0.4°F
(0.3°C)
72nd Coolest
Coolest since:
1917
56th Warmest
Warmest since:
2015
Ties: 1918, 1947
Aug 1960–May 1961
10-Month
54.9°F
(12.7°C)
54.6°F
(12.6°C)
0.3°F
(0.1°C)
74th Coolest
Coolest since:
1917
54th Warmest
Warmest since:
2015
Ties: 1918, 1928, 1947
Jul 1960–May 1961
11-Month
56.9°F
(13.8°C)
56.4°F
(13.6°C)
0.5°F
(0.2°C)
78th Coolest
Coolest since:
1917
50th Warmest
Warmest since:
2015
Ties: 1936, 1941
Jun 1960–May 1961
12-Month
58.3°F
(14.6°C)
57.4°F
(14.1°C)
0.9°F
(0.5°C)
98th Coolest
Coolest since:
1917
30th Warmest
Warmest since:
2015
Ties: 1943, 1951, 1960, 2001, 2006
Dec 1959–May 1961
18-Month
55.2°F
(12.9°C)
54.6°F
(12.6°C)
0.6°F
(0.3°C)
81st Coolest
Coolest since:
1917
46th Warmest
Warmest since:
2015
Ties: 1934
Jun 1959–May 1961
24-Month
58.3°F
(14.6°C)
57.4°F
(14.1°C)
0.9°F
(0.5°C)
93rd Coolest
Coolest since:
1913, 1917
34th Warmest
Warmest since:
2015
Ties: 1990, 2006
Jun 1958–May 1961
36-Month
58.6°F
(14.8°C)
57.4°F
(14.1°C)
1.2°F
(0.7°C)
108th Coolest
Coolest since:
1913, 1917
18th Warmest
Warmest to Date
2016
Ties: 1994, 2007, 2008, 2013
Jun 1957–May 1961
48-Month
58.3°F
(14.6°C)
57.4°F
(14.1°C)
0.9°F
(0.5°C)
97th Coolest
Coolest since:
1913
28th Warmest
Warmest since:
2016, 2017, 2018
Ties: 1941, 1962, 1990, 1993, 1994, 2000, 2011
Jun 1956–May 1961
60-Month
58.1°F
(14.5°C)
57.3°F
(14.1°C)
0.8°F
(0.4°C)
90th Coolest
Coolest since:
1913, 1917
34th Warmest
Warmest to Date
2018
Ties: 1962, 1963, 1982, 1991, 2002

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