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 1940

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  • Top 1/3
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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1940
1-Month
52.56°F
(11.42°C)
51.90°F
(11.06°C)
0.66°F
(0.36°C)
80th Coolest
Coolest since:
1918
49th Warmest
Warmest since:
2019
Aug–Sep 1940
2-Month
55.79°F
(13.22°C)
55.48°F
(13.04°C)
0.31°F
(0.18°C)
68th Coolest
Coolest since:
1974
61st Warmest
Warmest since:
2019
Jul–Sep 1940
3-Month
57.42°F
(14.12°C)
57.16°F
(13.98°C)
0.26°F
(0.14°C)
64th Coolest
Coolest since:
1924
65th Warmest
Warmest since:
2022
Jun–Sep 1940
4-Month
57.12°F
(13.96°C)
56.78°F
(13.77°C)
0.34°F
(0.19°C)
72nd Coolest
Coolest since:
1903
57th Warmest
Warmest since:
2021
May–Sep 1940
5-Month
55.12°F
(12.84°C)
54.91°F
(12.73°C)
0.21°F
(0.11°C)
64th Coolest
Coolest since:
1907, 1924
65th Warmest
Warmest since:
2018
Ties: 1949
Apr–Sep 1940
6-Month
52.32°F
(11.29°C)
52.20°F
(11.22°C)
0.12°F
(0.07°C)
58th Coolest
Coolest since:
1907
71st Warmest
Warmest since:
2018
Ties: 1911
Mar–Sep 1940
7-Month
49.15°F
(9.53°C)
49.03°F
(9.46°C)
0.12°F
(0.07°C)
59th Coolest
Coolest since:
1917
70th Warmest
Warmest since:
2012
Ties: 1930, 1983
Feb–Sep 1940
8-Month
46.04°F
(7.80°C)
45.75°F
(7.64°C)
0.29°F
(0.16°C)
77th Coolest
Coolest since:
1917
52nd Warmest
Warmest since:
2012
Ties: 1961
Jan–Sep 1940
9-Month
42.49°F
(5.83°C)
42.86°F
(6.03°C)
-0.37°F
(-0.20°C)
39th Coolest
Coolest since:
1917
90th Warmest
Warmest since:
2012
Dec 1939–Sep 1940
10-Month
40.90°F
(4.94°C)
40.84°F
(4.91°C)
0.06°F
(0.03°C)
63rd Coolest
Coolest since:
1917
65th Warmest
Warmest since:
2016
Nov 1939–Sep 1940
11-Month
39.87°F
(4.37°C)
39.91°F
(4.39°C)
-0.04°F
(-0.02°C)
53rd Coolest
Coolest since:
1917
75th Warmest
Warmest since:
2016
Ties: 1947
Oct 1939–Sep 1940
12-Month
40.01°F
(4.45°C)
40.04°F
(4.47°C)
-0.03°F
(-0.02°C)
54th Coolest
Coolest since:
1917
74th Warmest
Warmest since:
2016
Apr 1939–Sep 1940
18-Month
44.29°F
(6.83°C)
44.09°F
(6.72°C)
0.20°F
(0.11°C)
73rd Coolest
Coolest since:
1917
55th Warmest
Warmest since:
2016
Ties: 1911
Oct 1938–Sep 1940
24-Month
40.18°F
(4.54°C)
40.04°F
(4.47°C)
0.14°F
(0.07°C)
69th Coolest
Coolest since:
1918
58th Warmest
Warmest since:
2017
Ties: 1931, 1973
Oct 1937–Sep 1940
36-Month
40.51°F
(4.73°C)
40.03°F
(4.46°C)
0.48°F
(0.27°C)
87th Coolest
Coolest since:
1918
39th Warmest
Warmest since:
2017, 2018
Oct 1936–Sep 1940
48-Month
40.26°F
(4.59°C)
40.01°F
(4.45°C)
0.25°F
(0.14°C)
75th Coolest
Coolest since:
1918
50th Warmest
Warmest since:
2018
Oct 1935–Sep 1940
60-Month
40.11°F
(4.51°C)
40.00°F
(4.44°C)
0.11°F
(0.07°C)
66th Coolest
Coolest since:
1920
58th Warmest
Warmest since:
2019, 2020

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