National Rankings

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Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Minimum Temperature Rankings, September 1915

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Record Coolest

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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
September 1915 1-Month	52.30°F (11.28°C)	51.90°F (11.06°C)	0.40°F (0.22°C)	69th Coolest	Coolest since: 1914	1918
	52.30°F (11.28°C)	51.90°F (11.06°C)	0.40°F (0.22°C)	60th Warmest	Warmest since: 1911	2019
	Ties: 1937
Aug–Sep 1915 2-Month	54.87°F (12.71°C)	55.48°F (13.04°C)	-0.61°F (-0.33°C)	32nd Coolest	Coolest since: 1912	1974
Aug–Sep 1915 2-Month	54.87°F (12.71°C)	55.48°F (13.04°C)	-0.61°F (-0.33°C)	97th Warmest	Warmest since: 1914	2019
Jul–Sep 1915 3-Month	56.15°F (13.42°C)	57.16°F (13.98°C)	-1.01°F (-0.56°C)	10th Coolest	Coolest since: 1912	1924
Jul–Sep 1915 3-Month	56.15°F (13.42°C)	57.16°F (13.98°C)	-1.01°F (-0.56°C)	119th Warmest	Warmest since: 1914	2022
Jun–Sep 1915 4-Month	55.47°F (13.04°C)	56.78°F (13.77°C)	-1.31°F (-0.73°C)	5th Coolest	Coolest since: 1903	1903
Jun–Sep 1915 4-Month	55.47°F (13.04°C)	56.78°F (13.77°C)	-1.31°F (-0.73°C)	124th Warmest	Warmest since: 1914	2021
May–Sep 1915 5-Month	53.69°F (12.05°C)	54.91°F (12.73°C)	-1.22°F (-0.68°C)	6th Coolest	Coolest since: 1907	1907, 1924
May–Sep 1915 5-Month	53.69°F (12.05°C)	54.91°F (12.73°C)	-1.22°F (-0.68°C)	123rd Warmest	Warmest since: 1914	2018
Apr–Sep 1915 6-Month	51.75°F (10.97°C)	52.20°F (11.22°C)	-0.45°F (-0.25°C)	25th Coolest	Coolest since: 1912	1907
	51.75°F (10.97°C)	52.20°F (11.22°C)	-0.45°F (-0.25°C)	104th Warmest	Warmest since: 1914	2018
	Ties: 1895, 1908
Mar–Sep 1915 7-Month	48.14°F (8.97°C)	49.02°F (9.46°C)	-0.88°F (-0.49°C)	11th Coolest	Coolest since: 1912	1917
Mar–Sep 1915 7-Month	48.14°F (8.97°C)	49.02°F (9.46°C)	-0.88°F (-0.49°C)	118th Warmest	Warmest since: 1914	2012
Feb–Sep 1915 8-Month	45.42°F (7.46°C)	45.75°F (7.64°C)	-0.33°F (-0.18°C)	37th Coolest	Coolest since: 1914	1917
Feb–Sep 1915 8-Month	45.42°F (7.46°C)	45.75°F (7.64°C)	-0.33°F (-0.18°C)	92nd Warmest	Warmest since: 1911	2012
Jan–Sep 1915 9-Month	42.41°F (5.78°C)	42.86°F (6.03°C)	-0.45°F (-0.25°C)	34th Coolest	Coolest since: 1913	1917
	42.41°F (5.78°C)	42.86°F (6.03°C)	-0.45°F (-0.25°C)	95th Warmest	Warmest since: 1914	2012
	Ties: 1947, 1970
Dec 1914–Sep 1915 10-Month	39.97°F (4.43°C)	40.84°F (4.91°C)	-0.87°F (-0.48°C)	14th Coolest	Coolest since: 1913	1917
Dec 1914–Sep 1915 10-Month	39.97°F (4.43°C)	40.84°F (4.91°C)	-0.87°F (-0.48°C)	114th Warmest	Warmest since: 1914	2016
Nov 1914–Sep 1915 11-Month	39.14°F (3.97°C)	39.92°F (4.40°C)	-0.78°F (-0.43°C)	15th Coolest	Coolest since: 1913	1917
Nov 1914–Sep 1915 11-Month	39.14°F (3.97°C)	39.92°F (4.40°C)	-0.78°F (-0.43°C)	113th Warmest	Warmest since: 1914	2016
Oct 1914–Sep 1915 12-Month	39.50°F (4.17°C)	40.04°F (4.47°C)	-0.54°F (-0.30°C)	20th Coolest	Coolest since: 1913	1917
	39.50°F (4.17°C)	40.04°F (4.47°C)	-0.54°F (-0.30°C)	108th Warmest	Warmest since: 1914	2016
	Ties: 1916, 1937, 1960
Apr 1914–Sep 1915 18-Month	43.85°F (6.58°C)	44.09°F (6.72°C)	-0.24°F (-0.14°C)	36th Coolest	Coolest since: 1913	1917
	43.85°F (6.58°C)	44.09°F (6.72°C)	-0.24°F (-0.14°C)	92nd Warmest	Warmest since: 1914	2016
	Ties: 1976
Oct 1913–Sep 1915 24-Month	39.99°F (4.44°C)	40.04°F (4.47°C)	-0.05°F (-0.03°C)	54th Coolest	Coolest since: 1914	1918
	39.99°F (4.44°C)	40.04°F (4.47°C)	-0.05°F (-0.03°C)	73rd Warmest	Warmest since: 1911	2017
	Ties: 1911
Oct 1912–Sep 1915 36-Month	39.71°F (4.28°C)	40.02°F (4.46°C)	-0.31°F (-0.18°C)	31st Coolest	Coolest since: 1914	1918
	39.71°F (4.28°C)	40.02°F (4.46°C)	-0.31°F (-0.18°C)	95th Warmest	Warmest since: 1911	2017, 2018
	Ties: 1901, 1968, 1977
Oct 1911–Sep 1915 48-Month	39.33°F (4.07°C)	40.01°F (4.45°C)	-0.68°F (-0.38°C)	6th Coolest	Coolest since: 1913	1918
	39.33°F (4.07°C)	40.01°F (4.45°C)	-0.68°F (-0.38°C)	119th Warmest	Warmest since: 1914	2018
	Ties: 1906, 1913
Oct 1910–Sep 1915 60-Month	39.56°F (4.20°C)	40.00°F (4.44°C)	-0.44°F (-0.24°C)	13th Coolest	Coolest since: 1914	1920
	39.56°F (4.20°C)	40.00°F (4.44°C)	-0.44°F (-0.24°C)	111th Warmest	Warmest since: 1914	2019, 2020
	Ties: 1914

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published March 2023, retrieved on March 23, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings