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.

Maximum Temperature Rankings, September 1999

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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 1999 1-Month	77.94°F (25.52°C)	77.81°F (25.45°C)	0.13°F (0.07°C)	59th Coolest	Coolest since: 1996	1965
September 1999 1-Month	77.94°F (25.52°C)	77.81°F (25.45°C)	0.13°F (0.07°C)	70th Warmest	Warmest since: 1998	1998
Aug–Sep 1999 2-Month	81.94°F (27.74°C)	81.48°F (27.49°C)	0.46°F (0.25°C)	73rd Coolest	Coolest since: 1997	1965
Aug–Sep 1999 2-Month	81.94°F (27.74°C)	81.48°F (27.49°C)	0.46°F (0.25°C)	56th Warmest	Warmest since: 1998	1998
Jul–Sep 1999 3-Month	83.58°F (28.66°C)	83.21°F (28.45°C)	0.37°F (0.21°C)	74th Coolest	Coolest since: 1997	1912
Jul–Sep 1999 3-Month	83.58°F (28.66°C)	83.21°F (28.45°C)	0.37°F (0.21°C)	55th Warmest	Warmest since: 1998	1936
Jun–Sep 1999 4-Month	82.78°F (28.21°C)	82.74°F (28.19°C)	0.04°F (0.02°C)	59th Coolest	Coolest since: 1997	1915
Jun–Sep 1999 4-Month	82.78°F (28.21°C)	82.74°F (28.19°C)	0.04°F (0.02°C)	70th Warmest	Warmest since: 1998	1936
May–Sep 1999 5-Month	80.77°F (27.09°C)	80.78°F (27.10°C)	-0.01°F (-0.01°C)	56th Coolest	Coolest since: 1997	1915
	80.77°F (27.09°C)	80.78°F (27.10°C)	-0.01°F (-0.01°C)	73rd Warmest	Warmest since: 1998	1936
	Ties: 1983
Apr–Sep 1999 6-Month	77.88°F (25.49°C)	77.90°F (25.50°C)	-0.02°F (-0.01°C)	52nd Coolest	Coolest since: 1997	1907
	77.88°F (25.49°C)	77.90°F (25.50°C)	-0.02°F (-0.01°C)	77th Warmest	Warmest since: 1998	2012
	Ties: 1941, 1989
Mar–Sep 1999 7-Month	74.57°F (23.65°C)	74.35°F (23.53°C)	0.22°F (0.12°C)	68th Coolest	Coolest since: 1997	1912
	74.57°F (23.65°C)	74.35°F (23.53°C)	0.22°F (0.12°C)	61st Warmest	Warmest since: 1998	2012
	Ties: 1966
Feb–Sep 1999 8-Month	71.60°F (22.00°C)	70.66°F (21.48°C)	0.94°F (0.52°C)	94th Coolest	Coolest since: 1997	1912
	71.60°F (22.00°C)	70.66°F (21.48°C)	0.94°F (0.52°C)	35th Warmest	Warmest since: 1998	2012
	Ties: 1963
Jan–Sep 1999 9-Month	68.58°F (20.32°C)	67.30°F (19.61°C)	1.28°F (0.71°C)	102nd Coolest	Coolest since: 1997	1912
Jan–Sep 1999 9-Month	68.58°F (20.32°C)	67.30°F (19.61°C)	1.28°F (0.71°C)	27th Warmest	Warmest since: 1998	2012
Dec 1998–Sep 1999 10-Month	66.32°F (19.07°C)	64.86°F (18.26°C)	1.46°F (0.81°C)	109th Coolest	Coolest since: 1998	1912
Dec 1998–Sep 1999 10-Month	66.32°F (19.07°C)	64.86°F (18.26°C)	1.46°F (0.81°C)	19th Warmest	Warmest since: 1981	2012
Nov 1998–Sep 1999 11-Month	65.27°F (18.48°C)	63.75°F (17.64°C)	1.52°F (0.84°C)	113th Coolest	Coolest since: 1998	1912
Nov 1998–Sep 1999 11-Month	65.27°F (18.48°C)	63.75°F (17.64°C)	1.52°F (0.84°C)	15th Warmest	Warmest since: 1954	2012
Oct 1998–Sep 1999 12-Month	65.41°F (18.56°C)	64.01°F (17.78°C)	1.40°F (0.78°C)	112th Coolest	Coolest since: 1998	1912
Oct 1998–Sep 1999 12-Month	65.41°F (18.56°C)	64.01°F (17.78°C)	1.40°F (0.78°C)	16th Warmest	Warmest since: 1954	2012
Apr 1998–Sep 1999 18-Month	70.04°F (21.13°C)	68.64°F (20.36°C)	1.40°F (0.77°C)	114th Coolest	Coolest since: 1998	1912
	70.04°F (21.13°C)	68.64°F (20.36°C)	1.40°F (0.77°C)	14th Warmest	Warmest since: 1954	2012
	Ties: 1935
Oct 1997–Sep 1999 24-Month	65.20°F (18.44°C)	64.00°F (17.78°C)	1.20°F (0.66°C)	110th Coolest	Coolest since: 1998	1913
Oct 1997–Sep 1999 24-Month	65.20°F (18.44°C)	64.00°F (17.78°C)	1.20°F (0.66°C)	17th Warmest	Warmest since: 1955	2017
Oct 1996–Sep 1999 36-Month	64.68°F (18.16°C)	63.98°F (17.77°C)	0.70°F (0.39°C)	92nd Coolest	Coolest since: 1998	1917
Oct 1996–Sep 1999 36-Month	64.68°F (18.16°C)	63.98°F (17.77°C)	0.70°F (0.39°C)	34th Warmest	Warmest since: 1992	2018
Oct 1995–Sep 1999 48-Month	64.55°F (18.08°C)	63.97°F (17.76°C)	0.58°F (0.32°C)	88th Coolest	Coolest since: 1998	1915
Oct 1995–Sep 1999 48-Month	64.55°F (18.08°C)	63.97°F (17.76°C)	0.58°F (0.32°C)	37th Warmest	Warmest since: 1992	2018
Oct 1994–Sep 1999 60-Month	64.51°F (18.06°C)	63.96°F (17.76°C)	0.55°F (0.30°C)	88th Coolest	Coolest since: 1998	1907
	64.51°F (18.06°C)	63.96°F (17.76°C)	0.55°F (0.30°C)	36th Warmest	Warmest since: 1992	2016
	Ties: 1939

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published March 2023, retrieved on March 22, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings