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 1955

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1955
1-Month
52.20°F
(11.22°C)
51.90°F
(11.06°C)
0.30°F
(0.16°C)
64th Coolest
Coolest since:
1918
65th Warmest
Warmest since:
2019
Aug–Sep 1955
2-Month
56.36°F
(13.53°C)
55.48°F
(13.04°C)
0.88°F
(0.49°C)
91st Coolest
Coolest since:
1974
38th Warmest
Warmest since:
2019
Ties: 1921
Jul–Sep 1955
3-Month
58.11°F
(14.51°C)
57.16°F
(13.98°C)
0.95°F
(0.53°C)
99th Coolest
Coolest since:
1924
30th Warmest
Warmest since:
2022
Jun–Sep 1955
4-Month
57.00°F
(13.89°C)
56.78°F
(13.77°C)
0.22°F
(0.12°C)
64th Coolest
Coolest since:
1903
65th Warmest
Warmest since:
2021
May–Sep 1955
5-Month
55.26°F
(12.92°C)
54.91°F
(12.73°C)
0.35°F
(0.19°C)
74th Coolest
Coolest since:
1907, 1924
55th Warmest
Warmest since:
2018
Ties: 1925
Apr–Sep 1955
6-Month
52.74°F
(11.52°C)
52.20°F
(11.22°C)
0.54°F
(0.30°C)
83rd Coolest
Coolest since:
1907
46th Warmest
Warmest since:
2018
Ties: 1969
Mar–Sep 1955
7-Month
49.18°F
(9.54°C)
49.03°F
(9.46°C)
0.15°F
(0.08°C)
65th Coolest
Coolest since:
1917
64th Warmest
Warmest since:
2012
Feb–Sep 1955
8-Month
45.49°F
(7.49°C)
45.74°F
(7.63°C)
-0.25°F
(-0.14°C)
39th Coolest
Coolest since:
1917
90th Warmest
Warmest since:
2012
Jan–Sep 1955
9-Month
42.60°F
(5.89°C)
42.86°F
(6.03°C)
-0.26°F
(-0.14°C)
44th Coolest
Coolest since:
1917
85th Warmest
Warmest since:
2012
Ties: 1985
Dec 1954–Sep 1955
10-Month
40.67°F
(4.82°C)
40.84°F
(4.91°C)
-0.17°F
(-0.09°C)
46th Coolest
Coolest since:
1917
82nd Warmest
Warmest since:
2016
Nov 1954–Sep 1955
11-Month
39.89°F
(4.38°C)
39.92°F
(4.40°C)
-0.03°F
(-0.02°C)
56th Coolest
Coolest since:
1917
72nd Warmest
Warmest since:
2016
Ties: 1985
Oct 1954–Sep 1955
12-Month
40.07°F
(4.48°C)
40.04°F
(4.47°C)
0.03°F
(0.01°C)
60th Coolest
Coolest since:
1917
68th Warmest
Warmest since:
2016
Apr 1954–Sep 1955
18-Month
44.28°F
(6.82°C)
44.10°F
(6.72°C)
0.18°F
(0.10°C)
71st Coolest
Coolest since:
1917
57th Warmest
Warmest since:
2016
Oct 1953–Sep 1955
24-Month
40.48°F
(4.71°C)
40.04°F
(4.47°C)
0.44°F
(0.24°C)
82nd Coolest
Coolest since:
1918
45th Warmest
Warmest since:
2017
Oct 1952–Sep 1955
36-Month
40.42°F
(4.68°C)
40.02°F
(4.46°C)
0.40°F
(0.22°C)
83rd Coolest
Coolest since:
1918
43rd Warmest
Warmest since:
2017, 2018
Oct 1951–Sep 1955
48-Month
40.29°F
(4.61°C)
40.01°F
(4.45°C)
0.28°F
(0.16°C)
80th Coolest
Coolest since:
1918
45th Warmest
Warmest since:
2018
Ties: 1922
Oct 1950–Sep 1955
60-Month
40.12°F
(4.51°C)
40.00°F
(4.44°C)
0.12°F
(0.07°C)
68th Coolest
Coolest since:
1920
56th Warmest
Warmest since:
2019, 2020
Ties: 1925

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