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, September 1910

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
September 1910
1-Month		67.4°F
(19.7°C)		68.5°F
(20.3°C)		-1.1°F
(-0.6°C)		36th Coolest
Coolest since:
1986
93rd Warmest
Warmest since:
2020
Ties: 1909, 1954
Aug–Sep 1910
2-Month		70.4°F
(21.3°C)		71.1°F
(21.7°C)		-0.7°F
(-0.4°C)		32nd Coolest
Coolest since:
1900
97th Warmest
Warmest since:
2020
Ties: 1973
Jul–Sep 1910
3-Month		71.9°F
(22.2°C)		72.3°F
(22.4°C)		-0.4°F
(-0.2°C)		40th Coolest
Coolest since:
1900
89th Warmest
Warmest since:
2022
Ties: 1897, 1949, 1956, 1964
Jun–Sep 1910
4-Month		70.6°F
(21.4°C)		71.3°F
(21.8°C)		-0.7°F
(-0.4°C)		29th Coolest
Coolest since:
1907
100th Warmest
Warmest since:
2021
Ties: 1902, 1947, 1980
May–Sep 1910
5-Month		69.3°F
(20.7°C)		69.2°F
(20.7°C)		0.1°F
(0.0°C)		63rd Coolest
Coolest since:
1907
66th Warmest
Warmest since:
2021
Ties: 1929, 1989
Apr–Sep 1910
6-Month		67.3°F
(19.6°C)		66.7°F
(19.3°C)		0.6°F
(0.3°C)		81st Coolest
Coolest since:
1912
48th Warmest
Warmest since:
2021
Ties: 1897, 1924, 1938, 1947
Mar–Sep 1910
7-Month		65.1°F
(18.4°C)		64.1°F
(17.8°C)		1.0°F
(0.6°C)		88th Coolest
Coolest since:
1912
41st Warmest
Warmest to Date
2021
Feb–Sep 1910
8-Month		62.3°F
(16.8°C)		61.8°F
(16.6°C)		0.5°F
(0.2°C)		80th Coolest
Coolest since:
1911
49th Warmest
Warmest to Date
2015
Ties: 1957, 1974, 1995, 2019
Jan–Sep 1910
9-Month		59.7°F
(15.4°C)		59.6°F
(15.3°C)		0.1°F
(0.1°C)		69th Coolest
Coolest since:
1903, 1911, 1917
60th Warmest
Warmest since:
2015
Ties: 1905, 1938, 1969, 1979, 1980, 1991
Dec 1909–Sep 1910
10-Month		57.7°F
(14.3°C)		57.9°F
(14.4°C)		-0.2°F
(-0.1°C)		46th Coolest
Coolest since:
1917, 1933
82nd Warmest
Warmest since:
2015
Ties: 1896, 1897, 1963, 1969, 1976, 1983
Nov 1909–Sep 1910
11-Month		56.8°F
(13.8°C)		57.2°F
(14.0°C)		-0.4°F
(-0.2°C)		38th Coolest
Coolest since:
1917
90th Warmest
Warmest since:
2015
Ties: 1897, 1942, 1945, 1976, 1999
Oct 1909–Sep 1910
12-Month		56.9°F
(13.8°C)		57.4°F
(14.1°C)		-0.5°F
(-0.3°C)		35th Coolest
Coolest since:
1917
93rd Warmest
Warmest since:
2015
Ties: 1906, 1908, 1976, 1983
Apr 1909–Sep 1910
18-Month		59.9°F
(15.5°C)		60.5°F
(15.8°C)		-0.6°F
(-0.3°C)		29th Coolest
Coolest since:
1917
99th Warmest
Warmest since:
2015
Ties: 1897, 1900, 1911, 1919, 1929
Oct 1908–Sep 1910
24-Month		56.6°F
(13.7°C)		57.4°F
(14.1°C)		-0.8°F
(-0.4°C)		14th Coolest
Coolest since:
1913, 1949
113th Warmest
Warmest since:
2015
Ties: 1904, 1907, 1908, 1909, 1911, 1916, 1948, 1956, 1965, 1976
Oct 1907–Sep 1910
36-Month		56.7°F
(13.7°C)		57.4°F
(14.1°C)		-0.7°F
(-0.4°C)		15th Coolest
Coolest since:
1913
111th Warmest
Warmest since:
2016
Ties: 1899, 1900, 1904, 1908, 1915
Oct 1906–Sep 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:
2017, 2018
Ties: 1909, 1911
Oct 1905–Sep 1910
60-Month		56.6°F
(13.7°C)		57.4°F
(14.1°C)		-0.8°F
(-0.4°C)		12th Coolest
Coolest since:
1913
112th Warmest
Warmest since:
2018
Ties: 1903, 1924, 1949

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