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 1990

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1990
1-Month
80.37°F
(26.87°C)
77.81°F
(25.45°C)
2.56°F
(1.42°C)
116th Coolest
Coolest since:
1965
13th Warmest
Warmest since:
1998
Aug–Sep 1990
2-Month
82.64°F
(28.13°C)
81.48°F
(27.49°C)
1.16°F
(0.64°C)
97th Coolest
Coolest since:
1965
32nd Warmest
Warmest since:
1998
Ties: 2003
Jul–Sep 1990
3-Month
83.67°F
(28.71°C)
83.21°F
(28.45°C)
0.46°F
(0.26°C)
78th Coolest
Coolest since:
1912
51st Warmest
Warmest since:
1936
Ties: 2013
Jun–Sep 1990
4-Month
83.57°F
(28.65°C)
82.74°F
(28.19°C)
0.83°F
(0.46°C)
91st Coolest
Coolest since:
1915
38th Warmest
Warmest since:
1936
May–Sep 1990
5-Month
81.03°F
(27.24°C)
80.78°F
(27.10°C)
0.25°F
(0.14°C)
68th Coolest
Coolest since:
1915
61st Warmest
Warmest since:
1936
Apr–Sep 1990
6-Month
78.36°F
(25.76°C)
77.90°F
(25.50°C)
0.46°F
(0.26°C)
77th Coolest
Coolest since:
1907
52nd Warmest
Warmest since:
2012
Ties: 1919
Mar–Sep 1990
7-Month
75.18°F
(23.99°C)
74.35°F
(23.53°C)
0.83°F
(0.46°C)
94th Coolest
Coolest since:
1912
35th Warmest
Warmest since:
2012
Feb–Sep 1990
8-Month
71.80°F
(22.11°C)
70.66°F
(21.48°C)
1.14°F
(0.63°C)
100th Coolest
Coolest since:
1912
29th Warmest
Warmest since:
2012
Jan–Sep 1990
9-Month
69.07°F
(20.59°C)
67.30°F
(19.61°C)
1.77°F
(0.98°C)
116th Coolest
Coolest since:
1912
13th Warmest
Warmest since:
2012
Ties: 1954
Dec 1989–Sep 1990
10-Month
66.05°F
(18.92°C)
64.86°F
(18.26°C)
1.19°F
(0.66°C)
104th Coolest
Coolest since:
1912
24th Warmest
Warmest since:
2012
Ties: 1988
Nov 1989–Sep 1990
11-Month
65.03°F
(18.35°C)
63.75°F
(17.64°C)
1.28°F
(0.71°C)
109th Coolest
Coolest since:
1912
19th Warmest
Warmest since:
2012
Ties: 1988
Oct 1989–Sep 1990
12-Month
65.23°F
(18.46°C)
64.01°F
(17.78°C)
1.22°F
(0.68°C)
108th Coolest
Coolest since:
1912
20th Warmest
Warmest since:
2012
Apr 1989–Sep 1990
18-Month
69.45°F
(20.81°C)
68.64°F
(20.36°C)
0.81°F
(0.45°C)
96th Coolest
Coolest since:
1912
32nd Warmest
Warmest since:
2012
Oct 1988–Sep 1990
24-Month
64.78°F
(18.21°C)
64.00°F
(17.78°C)
0.78°F
(0.43°C)
98th Coolest
Coolest since:
1913
29th Warmest
Warmest since:
2017
Oct 1987–Sep 1990
36-Month
64.92°F
(18.29°C)
63.98°F
(17.77°C)
0.94°F
(0.52°C)
101st Coolest
Coolest since:
1917
25th Warmest
Warmest since:
2018
Ties: 2003
Oct 1986–Sep 1990
48-Month
64.92°F
(18.29°C)
63.97°F
(17.76°C)
0.95°F
(0.53°C)
98th Coolest
Coolest since:
1915
27th Warmest
Warmest since:
2018
Oct 1985–Sep 1990
60-Month
64.80°F
(18.22°C)
63.96°F
(17.76°C)
0.84°F
(0.46°C)
93rd Coolest
Coolest since:
1907
31st Warmest
Warmest since:
2016
Ties: 2011

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