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 1931

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1931
1-Month
55.02°F
(12.79°C)
51.90°F
(11.06°C)
3.12°F
(1.73°C)
124th Coolest
Coolest since:
1918
5th Warmest
Warmest to Date
2019
Aug–Sep 1931
2-Month
56.88°F
(13.82°C)
55.48°F
(13.04°C)
1.40°F
(0.78°C)
108th Coolest
Coolest since:
1974
21st Warmest
Warmest to Date
2019
Jul–Sep 1931
3-Month
58.61°F
(14.78°C)
57.16°F
(13.98°C)
1.45°F
(0.80°C)
110th Coolest
Coolest since:
1924
19th Warmest
Warmest to Date
2022
Jun–Sep 1931
4-Month
58.25°F
(14.58°C)
56.78°F
(13.77°C)
1.47°F
(0.81°C)
111th Coolest
Coolest since:
1903
18th Warmest
Warmest to Date
2021
May–Sep 1931
5-Month
55.79°F
(13.22°C)
54.91°F
(12.73°C)
0.88°F
(0.49°C)
99th Coolest
Coolest since:
1907, 1924
30th Warmest
Warmest since:
2018
Apr–Sep 1931
6-Month
52.82°F
(11.57°C)
52.19°F
(11.22°C)
0.63°F
(0.35°C)
87th Coolest
Coolest since:
1907
42nd Warmest
Warmest since:
2018
Mar–Sep 1931
7-Month
49.32°F
(9.62°C)
49.02°F
(9.46°C)
0.30°F
(0.16°C)
74th Coolest
Coolest since:
1917
55th Warmest
Warmest since:
2012
Ties: 1937
Feb–Sep 1931
8-Month
46.58°F
(8.10°C)
45.75°F
(7.64°C)
0.83°F
(0.46°C)
94th Coolest
Coolest since:
1917
35th Warmest
Warmest since:
2012
Ties: 1930
Jan–Sep 1931
9-Month
43.89°F
(6.61°C)
42.86°F
(6.03°C)
1.03°F
(0.58°C)
96th Coolest
Coolest since:
1917
33rd Warmest
Warmest since:
2012
Dec 1930–Sep 1931
10-Month
41.63°F
(5.35°C)
40.84°F
(4.91°C)
0.79°F
(0.44°C)
93rd Coolest
Coolest since:
1917
35th Warmest
Warmest since:
2016
Ties: 1954
Nov 1930–Sep 1931
11-Month
40.55°F
(4.75°C)
39.91°F
(4.39°C)
0.64°F
(0.36°C)
88th Coolest
Coolest since:
1917
40th Warmest
Warmest since:
2016
Oct 1930–Sep 1931
12-Month
40.51°F
(4.73°C)
40.04°F
(4.47°C)
0.47°F
(0.26°C)
86th Coolest
Coolest since:
1917
42nd Warmest
Warmest since:
2016
Apr 1930–Sep 1931
18-Month
44.53°F
(6.96°C)
44.09°F
(6.72°C)
0.44°F
(0.24°C)
87th Coolest
Coolest since:
1917
41st Warmest
Warmest since:
2016
Ties: 1997, 2009
Oct 1929–Sep 1931
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: 1940, 1973
Oct 1928–Sep 1931
36-Month
39.83°F
(4.35°C)
40.02°F
(4.46°C)
-0.19°F
(-0.11°C)
42nd Coolest
Coolest since:
1918
84th Warmest
Warmest since:
2017, 2018
Oct 1927–Sep 1931
48-Month
39.79°F
(4.33°C)
40.01°F
(4.45°C)
-0.22°F
(-0.12°C)
39th Coolest
Coolest since:
1918
86th Warmest
Warmest since:
2018
Oct 1926–Sep 1931
60-Month
39.92°F
(4.40°C)
40.00°F
(4.44°C)
-0.08°F
(-0.04°C)
50th Coolest
Coolest since:
1920
74th Warmest
Warmest since:
2019, 2020
Ties: 1948

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