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.

Average Temperature Rankings, September 1999

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Warmest/Coolest
Since
Record
September 1999
1-Month
64.35°F
(17.97°C)
64.86°F
(18.26°C)
-0.51°F
(-0.29°C)
40th Coolest
Coolest since:
1965
89th Warmest
Warmest since:
1998
Aug–Sep 1999
2-Month
68.63°F
(20.35°C)
68.48°F
(20.27°C)
0.15°F
(0.08°C)
61st Coolest
Coolest since:
1974
68th Warmest
Warmest since:
1998
Ties: 1932
Jul–Sep 1999
3-Month
70.52°F
(21.40°C)
70.19°F
(21.22°C)
0.33°F
(0.18°C)
75th Coolest
Coolest since:
1950
54th Warmest
Warmest since:
2022
Ties: 2008
Jun–Sep 1999
4-Month
69.97°F
(21.09°C)
69.77°F
(20.98°C)
0.20°F
(0.11°C)
64th Coolest
Coolest since:
1903
65th Warmest
Warmest since:
2021
May–Sep 1999
5-Month
67.99°F
(19.99°C)
67.85°F
(19.92°C)
0.14°F
(0.07°C)
57th Coolest
Coolest since:
1907
72nd Warmest
Warmest since:
2018
Apr–Sep 1999
6-Month
65.25°F
(18.47°C)
65.05°F
(18.36°C)
0.20°F
(0.11°C)
61st Coolest
Coolest since:
1907
68th Warmest
Warmest since:
2012
Mar–Sep 1999
7-Month
62.04°F
(16.69°C)
61.69°F
(16.49°C)
0.35°F
(0.20°C)
76th Coolest
Coolest since:
1912
53rd Warmest
Warmest since:
2012
Ties: 1953
Feb–Sep 1999
8-Month
59.22°F
(15.12°C)
58.21°F
(14.56°C)
1.01°F
(0.56°C)
98th Coolest
Coolest since:
1917
31st Warmest
Warmest since:
2012
Jan–Sep 1999
9-Month
56.39°F
(13.55°C)
55.08°F
(12.82°C)
1.31°F
(0.73°C)
106th Coolest
Coolest since:
1912
23rd Warmest
Warmest since:
2012
Dec 1998–Sep 1999
10-Month
54.31°F
(12.39°C)
52.85°F
(11.58°C)
1.46°F
(0.81°C)
111th Coolest
Coolest since:
1917
17th Warmest
Warmest since:
2012
Nov 1998–Sep 1999
11-Month
53.46°F
(11.92°C)
51.84°F
(11.02°C)
1.62°F
(0.90°C)
112th Coolest
Coolest since:
1912
16th Warmest
Warmest since:
2012
Oct 1998–Sep 1999
12-Month
53.60°F
(12.00°C)
52.03°F
(11.13°C)
1.57°F
(0.87°C)
113th Coolest
Coolest since:
1912
15th Warmest
Warmest since:
2012
Ties: 2007
Apr 1998–Sep 1999
18-Month
57.96°F
(14.42°C)
56.37°F
(13.54°C)
1.59°F
(0.88°C)
115th Coolest
Coolest since:
1917
13th Warmest
Warmest since:
2012
Oct 1997–Sep 1999
24-Month
53.63°F
(12.02°C)
52.02°F
(11.12°C)
1.61°F
(0.90°C)
116th Coolest
Coolest since:
1913, 1918
11th Warmest
Warmest to Date
2017
Oct 1996–Sep 1999
36-Month
53.11°F
(11.73°C)
52.00°F
(11.11°C)
1.11°F
(0.62°C)
107th Coolest
Coolest since:
1917
19th Warmest
Warmest to Date
2018
Oct 1995–Sep 1999
48-Month
52.86°F
(11.59°C)
51.99°F
(11.11°C)
0.87°F
(0.48°C)
99th Coolest
Coolest since:
1918
26th Warmest
Warmest since:
2018
Oct 1994–Sep 1999
60-Month
52.87°F
(11.59°C)
51.98°F
(11.10°C)
0.89°F
(0.49°C)
99th Coolest
Coolest since:
1920
25th Warmest
Warmest since:
2020

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