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 1991

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1991
1-Month
52.25°F
(11.25°C)
51.90°F
(11.06°C)
0.35°F
(0.19°C)
67th Coolest
Coolest since:
1918
62nd Warmest
Warmest since:
2019
Aug–Sep 1991
2-Month
56.26°F
(13.48°C)
55.48°F
(13.04°C)
0.78°F
(0.44°C)
88th Coolest
Coolest since:
1974
41st Warmest
Warmest since:
2019
Jul–Sep 1991
3-Month
57.88°F
(14.38°C)
57.16°F
(13.98°C)
0.72°F
(0.40°C)
94th Coolest
Coolest since:
1924
35th Warmest
Warmest since:
2022
Jun–Sep 1991
4-Month
57.62°F
(14.23°C)
56.78°F
(13.77°C)
0.84°F
(0.46°C)
101st Coolest
Coolest since:
1903
28th Warmest
Warmest since:
2021
Ties: 1980
May–Sep 1991
5-Month
56.18°F
(13.43°C)
54.91°F
(12.73°C)
1.27°F
(0.70°C)
109th Coolest
Coolest since:
1907, 1924
20th Warmest
Warmest since:
2018
Apr–Sep 1991
6-Month
53.59°F
(11.99°C)
52.19°F
(11.22°C)
1.40°F
(0.77°C)
113th Coolest
Coolest since:
1907
16th Warmest
Warmest since:
2018
Mar–Sep 1991
7-Month
50.50°F
(10.28°C)
49.03°F
(9.46°C)
1.47°F
(0.82°C)
114th Coolest
Coolest since:
1917
15th Warmest
Warmest to Date
2012
Feb–Sep 1991
8-Month
47.68°F
(8.71°C)
45.74°F
(7.63°C)
1.94°F
(1.08°C)
121st Coolest
Coolest since:
1917
8th Warmest
Warmest to Date
2012
Jan–Sep 1991
9-Month
44.58°F
(6.99°C)
42.86°F
(6.03°C)
1.72°F
(0.96°C)
114th Coolest
Coolest since:
1917
15th Warmest
Warmest since:
2012
Dec 1990–Sep 1991
10-Month
42.10°F
(5.61°C)
40.84°F
(4.91°C)
1.26°F
(0.70°C)
102nd Coolest
Coolest since:
1917
26th Warmest
Warmest since:
2016
Nov 1990–Sep 1991
11-Month
41.27°F
(5.15°C)
39.92°F
(4.40°C)
1.35°F
(0.75°C)
108th Coolest
Coolest since:
1917
20th Warmest
Warmest since:
2016
Oct 1990–Sep 1991
12-Month
41.22°F
(5.12°C)
40.04°F
(4.47°C)
1.18°F
(0.65°C)
105th Coolest
Coolest since:
1917
23rd Warmest
Warmest since:
2016
Ties: 1934
Apr 1990–Sep 1991
18-Month
45.19°F
(7.33°C)
44.09°F
(6.72°C)
1.10°F
(0.61°C)
104th Coolest
Coolest since:
1917
24th Warmest
Warmest since:
2016
Oct 1989–Sep 1991
24-Month
41.11°F
(5.06°C)
40.04°F
(4.47°C)
1.07°F
(0.59°C)
105th Coolest
Coolest since:
1918
22nd Warmest
Warmest since:
2017
Oct 1988–Sep 1991
36-Month
40.83°F
(4.91°C)
40.02°F
(4.46°C)
0.81°F
(0.45°C)
98th Coolest
Coolest since:
1918
28th Warmest
Warmest since:
2017, 2018
Oct 1987–Sep 1991
48-Month
40.67°F
(4.82°C)
40.00°F
(4.44°C)
0.67°F
(0.38°C)
92nd Coolest
Coolest since:
1918
33rd Warmest
Warmest since:
2018
Ties: 1994
Oct 1986–Sep 1991
60-Month
40.83°F
(4.91°C)
40.00°F
(4.44°C)
0.83°F
(0.47°C)
98th Coolest
Coolest since:
1920
26th Warmest
Warmest to Date
2019, 2020
Ties: 1995

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