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 1910

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Warmest/Coolest
Since
Record
May 1910
1-Month
63.9°F
(17.7°C)
60.7°F
(15.9°C)
3.2°F
(1.8°C)
110th Coolest
Coolest since:
1977
19th Warmest
Warmest to Date
2001
Ties: 2000, 2012
Apr–May 1910
2-Month
60.6°F
(15.9°C)
57.4°F
(14.1°C)
3.2°F
(1.8°C)
117th Coolest
Coolest since:
1967
12th Warmest
Warmest to Date
1992
Ties: 1947, 1954, 2020
Mar–May 1910
3-Month
57.8°F
(14.3°C)
54.5°F
(12.5°C)
3.3°F
(1.8°C)
118th Coolest
Coolest since:
1917
11th Warmest
Warmest to Date
1934
Feb–May 1910
4-Month
54.0°F
(12.2°C)
52.2°F
(11.2°C)
1.8°F
(1.0°C)
104th Coolest
Coolest since:
1917
25th Warmest
Warmest to Date
1934
Ties: 1954, 1989
Jan–May 1910
5-Month
50.9°F
(10.5°C)
50.2°F
(10.1°C)
0.7°F
(0.4°C)
77th Coolest
Coolest since:
1917
52nd Warmest
Warmest since:
2015
Ties: 1958, 1966, 1980
Dec 1909–May 1910
6-Month
49.1°F
(9.5°C)
49.1°F
(9.5°C)
0.0°F
(0.0°C)
60th Coolest
Coolest since:
1917
68th Warmest
Warmest since:
2015
Ties: 1938, 2008
Nov 1909–May 1910
7-Month
49.0°F
(9.4°C)
49.1°F
(9.5°C)
-0.1°F
(-0.1°C)
54th Coolest
Coolest since:
1917
74th Warmest
Warmest since:
2015
Ties: 1957, 2011
Oct 1909–May 1910
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, 1925, 1935, 1957, 1974, 1991
Sep 1909–May 1910
9-Month
52.0°F
(11.1°C)
52.4°F
(11.3°C)
-0.4°F
(-0.2°C)
39th Coolest
Coolest since:
1917
89th Warmest
Warmest since:
2015
Ties: 1916, 1945, 1967, 1972, 1974, 1998
Aug 1909–May 1910
10-Month
54.1°F
(12.3°C)
54.6°F
(12.6°C)
-0.5°F
(-0.3°C)
37th Coolest
Coolest since:
1917
91st Warmest
Warmest since:
2015
Ties: 1902, 1944, 1945
Jul 1909–May 1910
11-Month
55.8°F
(13.2°C)
56.4°F
(13.6°C)
-0.6°F
(-0.4°C)
31st Coolest
Coolest since:
1917
97th Warmest
Warmest since:
2015
Ties: 1899, 1906, 1962, 1979
Jun 1909–May 1910
12-Month
56.8°F
(13.8°C)
57.4°F
(14.1°C)
-0.6°F
(-0.3°C)
29th Coolest
Coolest since:
1917
99th Warmest
Warmest since:
2015
Ties: 1899, 1937
Dec 1908–May 1910
18-Month
53.9°F
(12.2°C)
54.6°F
(12.6°C)
-0.7°F
(-0.4°C)
20th Coolest
Coolest since:
1917
107th Warmest
Warmest since:
2015
Ties: 1899, 1916, 1953
Jun 1908–May 1910
24-Month
56.6°F
(13.7°C)
57.4°F
(14.1°C)
-0.8°F
(-0.4°C)
15th Coolest
Coolest since:
1913, 1917
112th Warmest
Warmest since:
2015
Ties: 1899, 1914, 1920
Jun 1907–May 1910
36-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
114th Warmest
Warmest since:
2016
Ties: 1915, 1923
Jun 1906–May 1910
48-Month
56.6°F
(13.7°C)
57.4°F
(14.1°C)
-0.8°F
(-0.4°C)
13th Coolest
Coolest since:
1913
112th Warmest
Warmest since:
2016, 2017, 2018
Ties: 1904, 1909, 1924, 1949
Jun 1905–May 1910
60-Month
56.6°F
(13.7°C)
57.3°F
(14.1°C)
-0.7°F
(-0.4°C)
12th Coolest
Coolest to Date
1913, 1917
112th Warmest
Warmest since:
2018
Ties: 1911, 1918, 1924

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