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.

Minimum Temperature Rankings, September 1901

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1901
1-Month
50.79°F
(10.44°C)
51.90°F
(11.06°C)
-1.11°F
(-0.62°C)
24th Coolest
Coolest since:
1918
105th Warmest
Warmest since:
2019
Ties: 1964
Aug–Sep 1901
2-Month
55.52°F
(13.07°C)
55.48°F
(13.04°C)
0.04°F
(0.03°C)
58th Coolest
Coolest since:
1974
71st Warmest
Warmest since:
2019
Jul–Sep 1901
3-Month
57.86°F
(14.37°C)
57.16°F
(13.98°C)
0.70°F
(0.39°C)
92nd Coolest
Coolest since:
1924
37th Warmest
Warmest to Date
2022
Jun–Sep 1901
4-Month
57.26°F
(14.03°C)
56.78°F
(13.77°C)
0.48°F
(0.26°C)
78th Coolest
Coolest since:
1903
51st Warmest
Warmest since:
2021
May–Sep 1901
5-Month
55.45°F
(13.03°C)
54.91°F
(12.73°C)
0.54°F
(0.30°C)
84th Coolest
Coolest since:
1907, 1924
45th Warmest
Warmest since:
2018
Apr–Sep 1901
6-Month
52.39°F
(11.33°C)
52.20°F
(11.22°C)
0.19°F
(0.11°C)
62nd Coolest
Coolest since:
1907
67th Warmest
Warmest since:
2018
Ties: 1957
Mar–Sep 1901
7-Month
49.04°F
(9.47°C)
49.02°F
(9.46°C)
0.02°F
(0.01°C)
55th Coolest
Coolest since:
1917
74th Warmest
Warmest since:
2012
Ties: 1953, 2008
Feb–Sep 1901
8-Month
45.35°F
(7.42°C)
45.75°F
(7.64°C)
-0.40°F
(-0.22°C)
32nd Coolest
Coolest since:
1917
97th Warmest
Warmest since:
2012
Ties: 1944
Jan–Sep 1901
9-Month
42.65°F
(5.92°C)
42.85°F
(6.03°C)
-0.20°F
(-0.11°C)
49th Coolest
Coolest since:
1917
80th Warmest
Warmest since:
2012
Dec 1900–Sep 1901
10-Month
40.82°F
(4.90°C)
40.84°F
(4.91°C)
-0.02°F
(-0.01°C)
55th Coolest
Coolest since:
1917
73rd Warmest
Warmest since:
2016
Ties: 1976
Nov 1900–Sep 1901
11-Month
39.91°F
(4.39°C)
39.92°F
(4.40°C)
-0.01°F
(-0.01°C)
59th Coolest
Coolest since:
1917
69th Warmest
Warmest since:
2016
Oct 1900–Sep 1901
12-Month
40.32°F
(4.62°C)
40.05°F
(4.47°C)
0.27°F
(0.15°C)
76th Coolest
Coolest since:
1917
52nd Warmest
Warmest since:
2016
Ties: 1925
Apr 1900–Sep 1901
18-Month
44.59°F
(6.99°C)
44.10°F
(6.72°C)
0.49°F
(0.27°C)
90th Coolest
Coolest since:
1917
38th Warmest
Warmest to Date
2016
Oct 1899–Sep 1901
24-Month
40.55°F
(4.75°C)
40.04°F
(4.47°C)
0.51°F
(0.28°C)
85th Coolest
Coolest since:
1918
42nd Warmest
Warmest to Date
2017
Oct 1898–Sep 1901
36-Month
39.71°F
(4.28°C)
40.02°F
(4.46°C)
-0.31°F
(-0.18°C)
31st Coolest
Coolest since:
1918
95th Warmest
Warmest since:
2017, 2018
Ties: 1915, 1968, 1977
Oct 1897–Sep 1901
48-Month
39.83°F
(4.35°C)
40.01°F
(4.45°C)
-0.18°F
(-0.10°C)
42nd Coolest
Coolest since:
1918
83rd Warmest
Warmest to Date
2018
Oct 1896–Sep 1901
60-Month
39.81°F
(4.34°C)
40.00°F
(4.44°C)
-0.19°F
(-0.10°C)
39th Coolest
Coolest since:
1920
85th Warmest
Warmest to Date
2019, 2020
Ties: 1928

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