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 1921

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
September 1921
1-Month		66.8°F
(19.3°C)		68.5°F
(20.3°C)		-1.7°F
(-1.0°C)		25th Coolest
Coolest since:
1986
104th Warmest
Warmest since:
2020
Ties: 1916
Aug–Sep 1921
2-Month		69.8°F
(21.0°C)		71.1°F
(21.7°C)		-1.3°F
(-0.7°C)		18th Coolest
Coolest since:
1900
111th Warmest
Warmest since:
2020
Ties: 1986
Jul–Sep 1921
3-Month		71.7°F
(22.1°C)		72.3°F
(22.4°C)		-0.6°F
(-0.3°C)		31st Coolest
Coolest since:
1900
98th Warmest
Warmest since:
2022
Ties: 1896, 1940, 1944, 1947, 1987
Jun–Sep 1921
4-Month		71.1°F
(21.7°C)		71.3°F
(21.8°C)		-0.2°F
(-0.1°C)		41st Coolest
Coolest since:
1907
88th Warmest
Warmest since:
2021
Ties: 1906, 1919, 1924, 1956, 1978, 1999
May–Sep 1921
5-Month		68.3°F
(20.2°C)		69.2°F
(20.7°C)		-0.9°F
(-0.5°C)		25th Coolest
Coolest since:
1907
104th Warmest
Warmest since:
2021
Ties: 1914, 1933
Apr–Sep 1921
6-Month		65.6°F
(18.7°C)		66.7°F
(19.3°C)		-1.1°F
(-0.6°C)		22nd Coolest
Coolest since:
1912
107th Warmest
Warmest since:
2021
Ties: 1901, 1927
Mar–Sep 1921
7-Month		63.5°F
(17.5°C)		64.1°F
(17.8°C)		-0.6°F
(-0.3°C)		40th Coolest
Coolest since:
1912
89th Warmest
Warmest since:
2021
Feb–Sep 1921
8-Month		61.3°F
(16.3°C)		61.8°F
(16.6°C)		-0.5°F
(-0.3°C)		39th Coolest
Coolest since:
1911
90th Warmest
Warmest since:
2015
Ties: 1896, 1900, 1918, 1945, 1952, 1962, 1983
Jan–Sep 1921
9-Month		59.0°F
(15.0°C)		59.6°F
(15.3°C)		-0.6°F
(-0.3°C)		32nd Coolest
Coolest since:
1903, 1911, 1917
97th Warmest
Warmest since:
2015
Ties: 1897, 1962
Dec 1920–Sep 1921
10-Month		57.3°F
(14.1°C)		57.9°F
(14.4°C)		-0.6°F
(-0.3°C)		28th Coolest
Coolest since:
1917, 1933
100th Warmest
Warmest since:
2015
Ties: 1898, 1908, 1932, 1942, 1962, 1971
Nov 1920–Sep 1921
11-Month		56.5°F
(13.6°C)		57.2°F
(14.0°C)		-0.7°F
(-0.4°C)		28th Coolest
Coolest since:
1917
100th Warmest
Warmest since:
2015
Ties: 1898, 1953, 1973
Oct 1920–Sep 1921
12-Month		56.3°F
(13.5°C)		57.4°F
(14.1°C)		-1.1°F
(-0.6°C)		13th Coolest
Coolest since:
1917
115th Warmest
Warmest since:
2015
Ties: 1907, 1909
Apr 1920–Sep 1921
18-Month		59.4°F
(15.2°C)		60.5°F
(15.8°C)		-1.1°F
(-0.6°C)		7th Coolest
Coolest since:
1917
121st Warmest
Warmest since:
2015
Ties: 1907, 1964
Oct 1919–Sep 1921
24-Month		56.2°F
(13.4°C)		57.4°F
(14.1°C)		-1.2°F
(-0.7°C)		5th Coolest
Coolest since:
1913, 1949
122nd Warmest
Warmest since:
2015
Ties: 1933
Oct 1918–Sep 1921
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
121st Warmest
Warmest since:
2016
Ties: 1914, 1949
Oct 1917–Sep 1921
48-Month		56.7°F
(13.7°C)		57.4°F
(14.1°C)		-0.7°F
(-0.4°C)		16th Coolest
Coolest since:
1913
109th Warmest
Warmest since:
2017, 2018
Ties: 1903, 1916, 1924
Oct 1916–Sep 1921
60-Month		56.3°F
(13.5°C)		57.4°F
(14.1°C)		-1.1°F
(-0.6°C)		2nd Coolest
Coolest since:
1913
122nd Warmest
Warmest since:
2018
Ties: 1912, 1917

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