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 1964

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  • Top 1/3
  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1964
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: 1901
Aug–Sep 1964
2-Month
54.29°F
(12.38°C)
55.48°F
(13.04°C)
-1.19°F
(-0.66°C)
12th Coolest
Coolest since:
1974
117th Warmest
Warmest since:
2019
Jul–Sep 1964
3-Month
56.66°F
(13.70°C)
57.16°F
(13.98°C)
-0.50°F
(-0.28°C)
27th Coolest
Coolest since:
1924
102nd Warmest
Warmest since:
2022
Jun–Sep 1964
4-Month
56.32°F
(13.51°C)
56.78°F
(13.77°C)
-0.46°F
(-0.26°C)
32nd Coolest
Coolest since:
1903
97th Warmest
Warmest since:
2021
May–Sep 1964
5-Month
54.74°F
(12.63°C)
54.91°F
(12.73°C)
-0.17°F
(-0.10°C)
42nd Coolest
Coolest since:
1907, 1924
87th Warmest
Warmest since:
2018
Apr–Sep 1964
6-Month
52.15°F
(11.19°C)
52.20°F
(11.22°C)
-0.05°F
(-0.03°C)
51st Coolest
Coolest since:
1907
78th Warmest
Warmest since:
2018
Mar–Sep 1964
7-Month
48.52°F
(9.18°C)
49.02°F
(9.46°C)
-0.50°F
(-0.28°C)
28th Coolest
Coolest since:
1917
101st Warmest
Warmest since:
2012
Ties: 1967
Feb–Sep 1964
8-Month
44.98°F
(7.21°C)
45.75°F
(7.64°C)
-0.77°F
(-0.43°C)
21st Coolest
Coolest since:
1917
108th Warmest
Warmest since:
2012
Jan–Sep 1964
9-Month
42.22°F
(5.68°C)
42.86°F
(6.03°C)
-0.64°F
(-0.35°C)
23rd Coolest
Coolest since:
1917
106th Warmest
Warmest since:
2012
Dec 1963–Sep 1964
10-Month
39.75°F
(4.31°C)
40.84°F
(4.91°C)
-1.09°F
(-0.60°C)
11th Coolest
Coolest since:
1917
117th Warmest
Warmest since:
2016
Nov 1963–Sep 1964
11-Month
39.11°F
(3.95°C)
39.92°F
(4.40°C)
-0.81°F
(-0.45°C)
14th Coolest
Coolest since:
1917
114th Warmest
Warmest since:
2016
Oct 1963–Sep 1964
12-Month
39.62°F
(4.23°C)
40.04°F
(4.47°C)
-0.42°F
(-0.24°C)
29th Coolest
Coolest since:
1917
99th Warmest
Warmest since:
2016
Ties: 1970
Apr 1963–Sep 1964
18-Month
43.99°F
(6.66°C)
44.09°F
(6.72°C)
-0.10°F
(-0.06°C)
48th Coolest
Coolest since:
1917
80th Warmest
Warmest since:
2016
Ties: 1943
Oct 1962–Sep 1964
24-Month
39.88°F
(4.38°C)
40.04°F
(4.47°C)
-0.16°F
(-0.09°C)
47th Coolest
Coolest since:
1918
80th Warmest
Warmest since:
2017
Oct 1961–Sep 1964
36-Month
39.69°F
(4.27°C)
40.03°F
(4.46°C)
-0.34°F
(-0.19°C)
30th Coolest
Coolest since:
1918
96th Warmest
Warmest since:
2017, 2018
Oct 1960–Sep 1964
48-Month
39.77°F
(4.32°C)
40.01°F
(4.45°C)
-0.24°F
(-0.13°C)
36th Coolest
Coolest since:
1918
89th Warmest
Warmest since:
2018
Ties: 1930
Oct 1959–Sep 1964
60-Month
39.72°F
(4.29°C)
40.00°F
(4.44°C)
-0.28°F
(-0.15°C)
29th Coolest
Coolest since:
1920
95th Warmest
Warmest since:
2019, 2020
Ties: 1904

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