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 1909

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2023)
Warmest/Coolest
Since
Record
April 1909
1-Month
54.7°F
(12.6°C)
54.0°F
(12.2°C)
0.7°F
(0.4°C)
76th Coolest
Coolest since:
1967
54th Warmest
Warmest since:
1989
Ties: 1899, 1960
Mar–Apr 1909
2-Month
50.2°F
(10.1°C)
51.4°F
(10.8°C)
-1.2°F
(-0.7°C)
35th Coolest
Coolest since:
1967
95th Warmest
Warmest since:
1934
Ties: 1919, 1969
Feb–Apr 1909
3-Month
48.0°F
(8.9°C)
49.4°F
(9.7°C)
-1.4°F
(-0.8°C)
28th Coolest
Coolest since:
1922
102nd Warmest
Warmest since:
2015
Ties: 1935, 1976
Jan–Apr 1909
4-Month
47.3°F
(8.5°C)
47.6°F
(8.7°C)
-0.3°F
(-0.2°C)
47th Coolest
Coolest since:
1922
83rd Warmest
Warmest since:
2015
Dec 1908–Apr 1909
5-Month
46.0°F
(7.8°C)
46.7°F
(8.2°C)
-0.7°F
(-0.4°C)
29th Coolest
Coolest since:
1917, 1949
100th Warmest
Warmest since:
2015
Ties: 1902, 1911, 1935, 1942, 1962
Nov 1908–Apr 1909
6-Month
46.7°F
(8.2°C)
47.2°F
(8.4°C)
-0.5°F
(-0.2°C)
33rd Coolest
Coolest since:
1917
96th Warmest
Warmest since:
2015
Ties: 1911, 1921, 1946, 1974, 1985
Oct 1908–Apr 1909
7-Month
48.0°F
(8.9°C)
48.9°F
(9.4°C)
-0.9°F
(-0.5°C)
22nd Coolest
Coolest since:
1917
107th Warmest
Warmest since:
2015
Ties: 1979, 1985
Sep 1908–Apr 1909
8-Month
50.4°F
(10.2°C)
51.4°F
(10.8°C)
-1.0°F
(-0.6°C)
20th Coolest
Coolest since:
1917
109th Warmest
Warmest since:
2015
Ties: 1897, 1969, 1975, 1979
Aug 1908–Apr 1909
9-Month
52.9°F
(11.6°C)
53.9°F
(12.2°C)
-1.0°F
(-0.6°C)
21st Coolest
Coolest since:
1917
108th Warmest
Warmest since:
2015
Ties: 1897, 1898
Jul 1908–Apr 1909
10-Month
55.3°F
(12.9°C)
56.0°F
(13.3°C)
-0.7°F
(-0.4°C)
28th Coolest
Coolest since:
1917
101st Warmest
Warmest since:
2015
Ties: 1964
Jun 1908–Apr 1909
11-Month
56.1°F
(13.4°C)
57.1°F
(13.9°C)
-1.0°F
(-0.5°C)
15th Coolest
Coolest since:
1917
114th Warmest
Warmest since:
2015
Ties: 1933, 1945, 1983
May 1908–Apr 1909
12-Month
56.1°F
(13.4°C)
57.4°F
(14.1°C)
-1.3°F
(-0.7°C)
7th Coolest
Coolest since:
1917
122nd Warmest
Warmest since:
2015
Ties: 1955
Nov 1907–Apr 1909
18-Month
53.2°F
(11.8°C)
54.0°F
(12.2°C)
-0.8°F
(-0.4°C)
18th Coolest
Coolest since:
1949
110th Warmest
Warmest since:
2015
Ties: 1898, 1924, 1973
May 1907–Apr 1909
24-Month
56.3°F
(13.5°C)
57.4°F
(14.1°C)
-1.1°F
(-0.6°C)
8th Coolest
Coolest since:
1913
120th Warmest
Warmest since:
2015
Ties: 1903, 1904, 1912
May 1906–Apr 1909
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
115th Warmest
Warmest since:
2016
Ties: 1903, 1904, 1923
May 1905–Apr 1909
48-Month
56.6°F
(13.7°C)
57.4°F
(14.1°C)
-0.8°F
(-0.4°C)
16th Coolest
Coolest since:
1913
110th Warmest
Warmest since:
2016, 2018
Ties: 1903, 1904
May 1904–Apr 1909
60-Month
56.9°F
(13.8°C)
57.3°F
(14.1°C)
-0.4°F
(-0.3°C)
22nd Coolest
Coolest since:
1913
103rd Warmest
Warmest since:
2018
Ties: 1900, 1901, 1902, 1905, 1906, 1907, 1948, 1951, 1976

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