National Rankings

National Data Info
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 1991

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
September 1991
1-Month		77.56°F
(25.31°C)		77.81°F
(25.45°C)		-0.25°F
(-0.14°C)		53rd Coolest
Coolest since:
1965
76th Warmest
Warmest since:
1998
Aug–Sep 1991
2-Month		81.64°F
(27.58°C)		81.48°F
(27.49°C)		0.16°F
(0.09°C)		65th Coolest
Coolest since:
1965
64th Warmest
Warmest since:
1998
Jul–Sep 1991
3-Month		83.30°F
(28.50°C)		83.21°F
(28.45°C)		0.09°F
(0.05°C)		65th Coolest
Coolest since:
1912
64th Warmest
Warmest since:
1936
Jun–Sep 1991
4-Month		82.80°F
(28.22°C)		82.74°F
(28.19°C)		0.06°F
(0.03°C)		60th Coolest
Coolest since:
1915
69th Warmest
Warmest since:
1936
May–Sep 1991
5-Month		80.95°F
(27.19°C)		80.78°F
(27.10°C)		0.17°F
(0.09°C)		65th Coolest
Coolest since:
1915
64th Warmest
Warmest since:
1936
Ties: 2008
Apr–Sep 1991
6-Month		78.19°F
(25.66°C)		77.90°F
(25.50°C)		0.29°F
(0.16°C)		69th Coolest
Coolest since:
1907
60th Warmest
Warmest since:
2012
Mar–Sep 1991
7-Month		74.84°F
(23.80°C)		74.35°F
(23.53°C)		0.49°F
(0.27°C)		78th Coolest
Coolest since:
1912
51st Warmest
Warmest since:
2012
Feb–Sep 1991
8-Month		71.93°F
(22.18°C)		70.66°F
(21.48°C)		1.27°F
(0.70°C)		103rd Coolest
Coolest since:
1912
26th Warmest
Warmest since:
2012
Jan–Sep 1991
9-Month		68.30°F
(20.17°C)		67.30°F
(19.61°C)		1.00°F
(0.56°C)		97th Coolest
Coolest since:
1912
32nd Warmest
Warmest since:
2012
Dec 1990–Sep 1991
10-Month		65.66°F
(18.70°C)		64.86°F
(18.26°C)		0.80°F
(0.44°C)		94th Coolest
Coolest since:
1912
34th Warmest
Warmest since:
2012
Ties: 1946
Nov 1990–Sep 1991
11-Month		64.86°F
(18.26°C)		63.75°F
(17.64°C)		1.11°F
(0.62°C)		103rd Coolest
Coolest since:
1912
25th Warmest
Warmest since:
2012
Ties: 1987
Oct 1990–Sep 1991
12-Month		65.06°F
(18.37°C)		64.01°F
(17.78°C)		1.05°F
(0.59°C)		104th Coolest
Coolest since:
1912
24th Warmest
Warmest since:
2012
Apr 1990–Sep 1991
18-Month		69.49°F
(20.83°C)		68.64°F
(20.36°C)		0.85°F
(0.47°C)		101st Coolest
Coolest since:
1912
27th Warmest
Warmest since:
2012
Ties: 2005
Oct 1989–Sep 1991
24-Month		65.15°F
(18.42°C)		64.00°F
(17.78°C)		1.15°F
(0.64°C)		108th Coolest
Coolest since:
1913
19th Warmest
Warmest since:
2017
Oct 1988–Sep 1991
36-Month		64.88°F
(18.27°C)		63.98°F
(17.77°C)		0.90°F
(0.50°C)		98th Coolest
Coolest since:
1917
28th Warmest
Warmest since:
2018
Ties: 2005
Oct 1987–Sep 1991
48-Month		64.95°F
(18.31°C)		63.97°F
(17.76°C)		0.98°F
(0.55°C)		99th Coolest
Coolest since:
1915
26th Warmest
Warmest since:
2018
Oct 1986–Sep 1991
60-Month		64.95°F
(18.31°C)		63.96°F
(17.76°C)		0.99°F
(0.55°C)		99th Coolest
Coolest since:
1907
25th Warmest
Warmest since:
2016

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