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, April 1918

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2023)
Warmest/Coolest
Since
Record
April 1918
1-Month
53.9°F
(12.2°C)
54.0°F
(12.2°C)
-0.1°F
(0.0°C)
60th Coolest
Coolest since:
1967
70th Warmest
Warmest since:
1989
Ties: 1973
Mar–Apr 1918
2-Month
51.3°F
(10.7°C)
51.4°F
(10.8°C)
-0.1°F
(-0.1°C)
60th Coolest
Coolest since:
1967
70th Warmest
Warmest since:
1934
Ties: 1899
Feb–Apr 1918
3-Month
48.7°F
(9.3°C)
49.4°F
(9.7°C)
-0.7°F
(-0.4°C)
41st Coolest
Coolest since:
1922
89th Warmest
Warmest since:
2015
Ties: 1953, 1974, 1979
Jan–Apr 1918
4-Month
47.2°F
(8.4°C)
47.6°F
(8.7°C)
-0.4°F
(-0.3°C)
43rd Coolest
Coolest since:
1922
87th Warmest
Warmest since:
2015
Ties: 1946, 1963, 1999
Dec 1917–Apr 1918
5-Month
47.1°F
(8.4°C)
46.7°F
(8.2°C)
0.4°F
(0.2°C)
72nd Coolest
Coolest since:
1917, 1949
57th Warmest
Warmest since:
2015
Ties: 1953, 1965, 2006
Nov 1917–Apr 1918
6-Month
47.8°F
(8.8°C)
47.2°F
(8.4°C)
0.6°F
(0.4°C)
79th Coolest
Coolest since:
1917
50th Warmest
Warmest since:
2015
Ties: 1936, 1960
Oct 1917–Apr 1918
7-Month
49.9°F
(9.9°C)
48.9°F
(9.4°C)
1.0°F
(0.5°C)
89th Coolest
Coolest since:
1917
40th Warmest
Warmest since:
2015
Ties: 1914, 1954, 1977
Sep 1917–Apr 1918
8-Month
52.2°F
(11.2°C)
51.4°F
(10.8°C)
0.8°F
(0.4°C)
89th Coolest
Coolest since:
1917
40th Warmest
Warmest since:
2015
Ties: 1977
Aug 1917–Apr 1918
9-Month
54.7°F
(12.6°C)
53.9°F
(12.2°C)
0.8°F
(0.4°C)
91st Coolest
Coolest since:
1917
38th Warmest
Warmest since:
2015
Jul 1917–Apr 1918
10-Month
56.9°F
(13.8°C)
56.0°F
(13.3°C)
0.9°F
(0.5°C)
97th Coolest
Coolest since:
1917
32nd Warmest
Warmest to Date
2015
Ties: 1984, 1986, 2006
Jun 1917–Apr 1918
11-Month
58.0°F
(14.4°C)
57.1°F
(13.9°C)
0.9°F
(0.5°C)
96th Coolest
Coolest since:
1917
33rd Warmest
Warmest to Date
2015
Ties: 1951, 1988, 2012
May 1917–Apr 1918
12-Month
57.8°F
(14.3°C)
57.4°F
(14.1°C)
0.4°F
(0.2°C)
74th Coolest
Coolest since:
1917
55th Warmest
Warmest since:
2015
Ties: 1914, 1953, 1977, 1985
Nov 1916–Apr 1918
18-Month
53.0°F
(11.7°C)
54.0°F
(12.2°C)
-1.0°F
(-0.5°C)
12th Coolest
Coolest since:
1949
116th Warmest
Warmest since:
2015
May 1916–Apr 1918
24-Month
56.0°F
(13.3°C)
57.4°F
(14.1°C)
-1.4°F
(-0.8°C)
4th Coolest
Coolest since:
1913
124th Warmest
Warmest since:
2015
May 1915–Apr 1918
36-Month
56.3°F
(13.5°C)
57.4°F
(14.1°C)
-1.1°F
(-0.6°C)
5th Coolest
Coolest since:
1913, 1917
122nd Warmest
Warmest since:
2016
Ties: 1910, 1912, 1922, 1949, 1950
May 1914–Apr 1918
48-Month
56.4°F
(13.6°C)
57.4°F
(14.1°C)
-1.0°F
(-0.5°C)
7th Coolest
Coolest since:
1913
119th Warmest
Warmest since:
2016, 2018
Ties: 1914, 1917
May 1913–Apr 1918
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
109th Warmest
Warmest since:
2018
Ties: 1903, 1904, 1925, 1950, 1952

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