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 1909

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  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 1909
1-Month
51.46°F
(10.81°C)
51.90°F
(11.06°C)
-0.44°F
(-0.25°C)
41st Coolest
Coolest since:
1918
88th Warmest
Warmest since:
2019
Aug–Sep 1909
2-Month
55.62°F
(13.12°C)
55.48°F
(13.04°C)
0.14°F
(0.08°C)
64th Coolest
Coolest since:
1974
65th Warmest
Warmest since:
2019
Jul–Sep 1909
3-Month
57.08°F
(13.93°C)
57.16°F
(13.98°C)
-0.08°F
(-0.05°C)
52nd Coolest
Coolest since:
1924
77th Warmest
Warmest since:
2022
Jun–Sep 1909
4-Month
56.91°F
(13.84°C)
56.78°F
(13.77°C)
0.13°F
(0.07°C)
60th Coolest
Coolest since:
1903
69th Warmest
Warmest since:
2021
May–Sep 1909
5-Month
54.58°F
(12.54°C)
54.92°F
(12.73°C)
-0.34°F
(-0.19°C)
32nd Coolest
Coolest since:
1907, 1924
97th Warmest
Warmest since:
2018
Ties: 1979
Apr–Sep 1909
6-Month
51.55°F
(10.86°C)
52.20°F
(11.22°C)
-0.65°F
(-0.36°C)
20th Coolest
Coolest since:
1907
109th Warmest
Warmest since:
2018
Mar–Sep 1909
7-Month
48.38°F
(9.10°C)
49.02°F
(9.46°C)
-0.64°F
(-0.36°C)
22nd Coolest
Coolest since:
1917
107th Warmest
Warmest since:
2012
Feb–Sep 1909
8-Month
45.32°F
(7.40°C)
45.75°F
(7.64°C)
-0.43°F
(-0.24°C)
30th Coolest
Coolest since:
1917
99th Warmest
Warmest since:
2012
Jan–Sep 1909
9-Month
42.76°F
(5.98°C)
42.86°F
(6.03°C)
-0.10°F
(-0.05°C)
54th Coolest
Coolest since:
1917
75th Warmest
Warmest since:
2012
Ties: 1993
Dec 1908–Sep 1909
10-Month
40.80°F
(4.89°C)
40.84°F
(4.91°C)
-0.04°F
(-0.02°C)
51st Coolest
Coolest since:
1917
77th Warmest
Warmest since:
2016
Ties: 1977, 1985
Nov 1908–Sep 1909
11-Month
39.88°F
(4.38°C)
39.92°F
(4.40°C)
-0.04°F
(-0.02°C)
55th Coolest
Coolest since:
1917
73rd Warmest
Warmest since:
2016
Oct 1908–Sep 1909
12-Month
39.81°F
(4.34°C)
40.05°F
(4.47°C)
-0.24°F
(-0.13°C)
45th Coolest
Coolest since:
1917
83rd Warmest
Warmest since:
2016
Apr 1908–Sep 1909
18-Month
43.79°F
(6.55°C)
44.10°F
(6.72°C)
-0.31°F
(-0.17°C)
33rd Coolest
Coolest since:
1917
95th Warmest
Warmest since:
2016
Oct 1907–Sep 1909
24-Month
40.00°F
(4.44°C)
40.03°F
(4.46°C)
-0.03°F
(-0.02°C)
56th Coolest
Coolest since:
1918
71st Warmest
Warmest since:
2017
Oct 1906–Sep 1909
36-Month
39.90°F
(4.39°C)
40.02°F
(4.46°C)
-0.12°F
(-0.07°C)
49th Coolest
Coolest since:
1918
77th Warmest
Warmest since:
2017, 2018
Oct 1905–Sep 1909
48-Month
39.87°F
(4.37°C)
40.01°F
(4.45°C)
-0.14°F
(-0.08°C)
46th Coolest
Coolest since:
1918
79th Warmest
Warmest since:
2018
Oct 1904–Sep 1909
60-Month
39.80°F
(4.33°C)
40.00°F
(4.44°C)
-0.20°F
(-0.11°C)
36th Coolest
Coolest since:
1920
88th Warmest
Warmest since:
2019, 2020
Ties: 1910, 1963

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