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 1917

View Period (Months):
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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 1917
1-Month
51.10°F
(10.61°C)
51.90°F
(11.06°C)
-0.80°F
(-0.45°C)
33rd Coolest
Coolest since:
1918
96th Warmest
Warmest since:
2019
Aug–Sep 1917
2-Month
54.33°F
(12.41°C)
55.48°F
(13.04°C)
-1.15°F
(-0.63°C)
13th Coolest
Coolest since:
1974
116th Warmest
Warmest since:
2019
Jul–Sep 1917
3-Month
56.62°F
(13.68°C)
57.16°F
(13.98°C)
-0.54°F
(-0.30°C)
25th Coolest
Coolest since:
1924
104th Warmest
Warmest since:
2022
Jun–Sep 1917
4-Month
55.75°F
(13.19°C)
56.78°F
(13.77°C)
-1.03°F
(-0.58°C)
11th Coolest
Coolest since:
1903
118th Warmest
Warmest since:
2021
May–Sep 1917
5-Month
53.21°F
(11.78°C)
54.92°F
(12.73°C)
-1.71°F
(-0.95°C)
3rd Coolest
Coolest since:
1907, 1924
126th Warmest
Warmest since:
2018
Apr–Sep 1917
6-Month
50.47°F
(10.26°C)
52.19°F
(11.22°C)
-1.72°F
(-0.96°C)
2nd Coolest
Coolest since:
1907
127th Warmest
Warmest since:
2018
Mar–Sep 1917
7-Month
47.07°F
(8.37°C)
49.02°F
(9.46°C)
-1.95°F
(-1.09°C)
1st Coolest
Coolest since:
1917
128th Warmest
Warmest since:
2012
Feb–Sep 1917
8-Month
43.47°F
(6.37°C)
45.75°F
(7.64°C)
-2.28°F
(-1.27°C)
1st Coolest
Coolest since:
1917
128th Warmest
Warmest since:
2012
Jan–Sep 1917
9-Month
40.59°F
(4.77°C)
42.86°F
(6.03°C)
-2.27°F
(-1.26°C)
1st Coolest
Coolest since:
1917
128th Warmest
Warmest since:
2012
Dec 1916–Sep 1917
10-Month
38.33°F
(3.52°C)
40.84°F
(4.91°C)
-2.51°F
(-1.39°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2016
Nov 1916–Sep 1917
11-Month
37.37°F
(2.98°C)
39.91°F
(4.39°C)
-2.54°F
(-1.41°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2016
Oct 1916–Sep 1917
12-Month
37.55°F
(3.08°C)
40.05°F
(4.47°C)
-2.50°F
(-1.39°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2016
Apr 1916–Sep 1917
18-Month
42.15°F
(5.64°C)
44.10°F
(6.72°C)
-1.95°F
(-1.08°C)
1st Coolest
Coolest since:
1917
127th Warmest
Warmest since:
2016
Oct 1915–Sep 1917
24-Month
38.52°F
(3.62°C)
40.03°F
(4.46°C)
-1.51°F
(-0.84°C)
2nd Coolest
Coolest since:
1918
125th Warmest
Warmest since:
2017
Oct 1914–Sep 1917
36-Month
38.85°F
(3.81°C)
40.02°F
(4.46°C)
-1.17°F
(-0.65°C)
2nd Coolest
Coolest since:
1918
124th Warmest
Warmest since:
2017, 2018
Oct 1913–Sep 1917
48-Month
39.25°F
(4.03°C)
40.00°F
(4.44°C)
-0.75°F
(-0.41°C)
4th Coolest
Coolest since:
1918
121st Warmest
Warmest since:
2018
Oct 1912–Sep 1917
60-Month
39.24°F
(4.02°C)
40.00°F
(4.44°C)
-0.76°F
(-0.42°C)
4th Coolest
Coolest since:
1920
120th Warmest
Warmest since:
2019, 2020

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