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 1948

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Warmest/Coolest
Since
Record
September 1948
1-Month
52.11°F
(11.17°C)
51.90°F
(11.06°C)
0.21°F
(0.11°C)
61st Coolest
Coolest since:
1918
68th Warmest
Warmest since:
2019
Aug–Sep 1948
2-Month
55.35°F
(12.97°C)
55.48°F
(13.04°C)
-0.13°F
(-0.07°C)
46th Coolest
Coolest since:
1974
83rd Warmest
Warmest since:
2019
Ties: 1895
Jul–Sep 1948
3-Month
56.96°F
(13.87°C)
57.16°F
(13.98°C)
-0.20°F
(-0.11°C)
42nd Coolest
Coolest since:
1924
87th Warmest
Warmest since:
2022
Ties: 1984
Jun–Sep 1948
4-Month
56.71°F
(13.73°C)
56.78°F
(13.77°C)
-0.07°F
(-0.04°C)
46th Coolest
Coolest since:
1903
83rd Warmest
Warmest since:
2021
May–Sep 1948
5-Month
54.82°F
(12.68°C)
54.91°F
(12.73°C)
-0.09°F
(-0.05°C)
45th Coolest
Coolest since:
1907, 1924
84th Warmest
Warmest since:
2018
Apr–Sep 1948
6-Month
52.47°F
(11.37°C)
52.20°F
(11.22°C)
0.27°F
(0.15°C)
68th Coolest
Coolest since:
1907
61st Warmest
Warmest since:
2018
Ties: 1906, 1989
Mar–Sep 1948
7-Month
48.89°F
(9.38°C)
49.02°F
(9.46°C)
-0.13°F
(-0.08°C)
46th Coolest
Coolest since:
1917
83rd Warmest
Warmest since:
2012
Ties: 1942
Feb–Sep 1948
8-Month
45.37°F
(7.43°C)
45.75°F
(7.64°C)
-0.38°F
(-0.21°C)
34th Coolest
Coolest since:
1917
95th Warmest
Warmest since:
2012
Jan–Sep 1948
9-Month
42.20°F
(5.67°C)
42.86°F
(6.03°C)
-0.66°F
(-0.36°C)
22nd Coolest
Coolest since:
1917
107th Warmest
Warmest since:
2012
Dec 1947–Sep 1948
10-Month
40.26°F
(4.59°C)
40.84°F
(4.91°C)
-0.58°F
(-0.32°C)
26th Coolest
Coolest since:
1917
102nd Warmest
Warmest since:
2016
Nov 1947–Sep 1948
11-Month
39.21°F
(4.01°C)
39.92°F
(4.40°C)
-0.71°F
(-0.39°C)
18th Coolest
Coolest since:
1917
110th Warmest
Warmest since:
2016
Oct 1947–Sep 1948
12-Month
39.79°F
(4.33°C)
40.04°F
(4.47°C)
-0.25°F
(-0.14°C)
44th Coolest
Coolest since:
1917
84th Warmest
Warmest since:
2016
Apr 1947–Sep 1948
18-Month
43.94°F
(6.63°C)
44.09°F
(6.72°C)
-0.15°F
(-0.09°C)
43rd Coolest
Coolest since:
1917
85th Warmest
Warmest since:
2016
Ties: 1960
Oct 1946–Sep 1948
24-Month
39.89°F
(4.38°C)
40.04°F
(4.47°C)
-0.15°F
(-0.09°C)
48th Coolest
Coolest since:
1918
79th Warmest
Warmest since:
2017
Oct 1945–Sep 1948
36-Month
39.98°F
(4.43°C)
40.02°F
(4.46°C)
-0.04°F
(-0.03°C)
57th Coolest
Coolest since:
1918
69th Warmest
Warmest since:
2017, 2018
Oct 1944–Sep 1948
48-Month
39.99°F
(4.44°C)
40.01°F
(4.45°C)
-0.02°F
(-0.01°C)
54th Coolest
Coolest since:
1918
71st Warmest
Warmest since:
2018
Oct 1943–Sep 1948
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: 1931

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