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 1921

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Warmest/Coolest
Since
Record
September 1921
1-Month
53.71°F
(12.06°C)
51.90°F
(11.06°C)
1.81°F
(1.00°C)
108th Coolest
Coolest since:
1918
21st Warmest
Warmest since:
2019
Ties: 1906
Aug–Sep 1921
2-Month
56.37°F
(13.54°C)
55.48°F
(13.04°C)
0.89°F
(0.50°C)
92nd Coolest
Coolest since:
1974
37th Warmest
Warmest since:
2019
Ties: 1959
Jul–Sep 1921
3-Month
58.15°F
(14.53°C)
57.16°F
(13.98°C)
0.99°F
(0.55°C)
100th Coolest
Coolest since:
1924
29th Warmest
Warmest to Date
2022
Jun–Sep 1921
4-Month
58.04°F
(14.47°C)
56.78°F
(13.77°C)
1.26°F
(0.70°C)
108th Coolest
Coolest since:
1903
21st Warmest
Warmest to Date
2021
May–Sep 1921
5-Month
55.97°F
(13.32°C)
54.91°F
(12.73°C)
1.06°F
(0.59°C)
102nd Coolest
Coolest since:
1907, 1924
27th Warmest
Warmest to Date
2018
Apr–Sep 1921
6-Month
53.02°F
(11.68°C)
52.20°F
(11.22°C)
0.82°F
(0.46°C)
97th Coolest
Coolest since:
1907
32nd Warmest
Warmest since:
2018
Mar–Sep 1921
7-Month
50.40°F
(10.22°C)
49.02°F
(9.46°C)
1.38°F
(0.76°C)
110th Coolest
Coolest since:
1917
19th Warmest
Warmest to Date
2012
Ties: 1986
Feb–Sep 1921
8-Month
47.29°F
(8.49°C)
45.75°F
(7.64°C)
1.54°F
(0.85°C)
115th Coolest
Coolest since:
1917
14th Warmest
Warmest to Date
2012
Ties: 2005
Jan–Sep 1921
9-Month
44.73°F
(7.07°C)
42.86°F
(6.03°C)
1.87°F
(1.04°C)
117th Coolest
Coolest since:
1917
12th Warmest
Warmest to Date
2012
Dec 1920–Sep 1921
10-Month
42.61°F
(5.89°C)
40.84°F
(4.91°C)
1.77°F
(0.98°C)
114th Coolest
Coolest since:
1917
14th Warmest
Warmest to Date
2016
Nov 1920–Sep 1921
11-Month
41.42°F
(5.23°C)
39.92°F
(4.40°C)
1.50°F
(0.83°C)
112th Coolest
Coolest since:
1917
16th Warmest
Warmest to Date
2016
Oct 1920–Sep 1921
12-Month
41.49°F
(5.27°C)
40.04°F
(4.47°C)
1.45°F
(0.80°C)
112th Coolest
Coolest since:
1917
16th Warmest
Warmest to Date
2016
Apr 1920–Sep 1921
18-Month
44.71°F
(7.06°C)
44.09°F
(6.72°C)
0.62°F
(0.34°C)
92nd Coolest
Coolest since:
1917
36th Warmest
Warmest to Date
2016
Oct 1919–Sep 1921
24-Month
40.20°F
(4.56°C)
40.04°F
(4.47°C)
0.16°F
(0.09°C)
71st Coolest
Coolest since:
1918
56th Warmest
Warmest since:
2017
Ties: 1936
Oct 1918–Sep 1921
36-Month
40.37°F
(4.65°C)
40.02°F
(4.46°C)
0.35°F
(0.19°C)
75th Coolest
Coolest since:
1918
51st Warmest
Warmest to Date
2017, 2018
Ties: 1982
Oct 1917–Sep 1921
48-Month
39.94°F
(4.41°C)
40.01°F
(4.45°C)
-0.07°F
(-0.04°C)
48th Coolest
Coolest since:
1918
77th Warmest
Warmest since:
2018
Ties: 1946, 1982
Oct 1916–Sep 1921
60-Month
39.46°F
(4.14°C)
40.00°F
(4.44°C)
-0.54°F
(-0.30°C)
9th Coolest
Coolest since:
1920
115th Warmest
Warmest since:
2019, 2020

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