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 1899

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1899
1-Month
50.61°F
(10.34°C)
51.90°F
(11.06°C)
-1.29°F
(-0.72°C)
18th Coolest
Coolest since:
1918
111th Warmest
Warmest since:
2019
Aug–Sep 1899
2-Month
54.65°F
(12.58°C)
55.48°F
(13.04°C)
-0.83°F
(-0.46°C)
23rd Coolest
Coolest since:
1974
106th Warmest
Warmest since:
2019
Jul–Sep 1899
3-Month
56.39°F
(13.55°C)
57.16°F
(13.98°C)
-0.77°F
(-0.43°C)
20th Coolest
Coolest since:
1924
109th Warmest
Warmest since:
2022
Jun–Sep 1899
4-Month
56.23°F
(13.46°C)
56.78°F
(13.77°C)
-0.55°F
(-0.31°C)
28th Coolest
Coolest since:
1903
101st Warmest
Warmest since:
2021
Ties: 1975
May–Sep 1899
5-Month
54.50°F
(12.50°C)
54.91°F
(12.73°C)
-0.41°F
(-0.23°C)
29th Coolest
Coolest since:
1907, 1924
100th Warmest
Warmest since:
2018
Ties: 1918
Apr–Sep 1899
6-Month
51.79°F
(10.99°C)
52.20°F
(11.22°C)
-0.41°F
(-0.23°C)
29th Coolest
Coolest since:
1907
100th Warmest
Warmest since:
2018
Ties: 1927
Mar–Sep 1899
7-Month
48.16°F
(8.98°C)
49.03°F
(9.46°C)
-0.87°F
(-0.48°C)
12th Coolest
Coolest since:
1917
117th Warmest
Warmest since:
2012
Feb–Sep 1899
8-Month
43.97°F
(6.65°C)
45.75°F
(7.64°C)
-1.78°F
(-0.99°C)
2nd Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2012
Jan–Sep 1899
9-Month
41.25°F
(5.14°C)
42.86°F
(6.03°C)
-1.61°F
(-0.89°C)
5th Coolest
Coolest since:
1917
124th Warmest
Warmest since:
2012
Dec 1898–Sep 1899
10-Month
38.97°F
(3.87°C)
40.84°F
(4.91°C)
-1.87°F
(-1.04°C)
2nd Coolest
Coolest since:
1917
126th Warmest
Warmest since:
2016
Nov 1898–Sep 1899
11-Month
37.90°F
(3.28°C)
39.91°F
(4.39°C)
-2.01°F
(-1.11°C)
2nd Coolest
Coolest since:
1917
126th Warmest
Warmest since:
2016
Oct 1898–Sep 1899
12-Month
38.04°F
(3.36°C)
40.04°F
(4.47°C)
-2.00°F
(-1.11°C)
2nd Coolest
Coolest since:
1917
126th Warmest
Warmest since:
2016
Apr 1898–Sep 1899
18-Month
42.86°F
(6.03°C)
44.09°F
(6.72°C)
-1.23°F
(-0.69°C)
4th Coolest
Coolest since:
1917
124th Warmest
Warmest since:
2016
Oct 1897–Sep 1899
24-Month
39.11°F
(3.95°C)
40.03°F
(4.46°C)
-0.92°F
(-0.51°C)
6th Coolest
Coolest since:
1918
121st Warmest
Warmest since:
2017
Oct 1896–Sep 1899
36-Month
39.32°F
(4.07°C)
40.02°F
(4.46°C)
-0.70°F
(-0.39°C)
10th Coolest
Coolest since:
1918
116th Warmest
Warmest since:
2017, 2018
Oct 1895–Sep 1899
48-Month
39.41°F
(4.12°C)
40.00°F
(4.44°C)
-0.59°F
(-0.32°C)
10th Coolest
Coolest since:
1918
115th Warmest
Warmest to Date
2018

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