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 2018

View Period (Months):
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  • Top 1/10
  • Record Warmest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Warmest/Coolest
Since
Record
September 2018
1-Month
55.71°F
(13.17°C)
51.90°F
(11.06°C)
3.81°F
(2.11°C)
125th Coolest
Coolest since:
1918
4th Warmest
Warmest since:
2019
Aug–Sep 2018
2-Month
58.38°F
(14.66°C)
55.48°F
(13.04°C)
2.90°F
(1.62°C)
125th Coolest
Coolest since:
1974
4th Warmest
Warmest since:
2019
Jul–Sep 2018
3-Month
59.81°F
(15.45°C)
57.16°F
(13.98°C)
2.65°F
(1.47°C)
125th Coolest
Coolest since:
1924
4th Warmest
Warmest since:
2022
Jun–Sep 2018
4-Month
59.59°F
(15.33°C)
56.78°F
(13.77°C)
2.81°F
(1.56°C)
126th Coolest
Coolest since:
1903
3rd Warmest
Warmest to Date
2021
May–Sep 2018
5-Month
58.19°F
(14.55°C)
54.91°F
(12.73°C)
3.28°F
(1.82°C)
128th Coolest
Coolest since:
1907, 1924
1st Warmest
Warmest to Date
2018
Apr–Sep 2018
6-Month
54.53°F
(12.52°C)
52.20°F
(11.22°C)
2.33°F
(1.30°C)
128th Coolest
Coolest since:
1907
1st Warmest
Warmest to Date
2018
Mar–Sep 2018
7-Month
51.23°F
(10.68°C)
49.02°F
(9.46°C)
2.21°F
(1.22°C)
124th Coolest
Coolest since:
1917
5th Warmest
Warmest since:
2012
Feb–Sep 2018
8-Month
47.87°F
(8.82°C)
45.75°F
(7.64°C)
2.12°F
(1.18°C)
124th Coolest
Coolest since:
1917
5th Warmest
Warmest since:
2012
Jan–Sep 2018
9-Month
44.90°F
(7.17°C)
42.86°F
(6.03°C)
2.04°F
(1.14°C)
120th Coolest
Coolest since:
1917
9th Warmest
Warmest since:
2012
Dec 2017–Sep 2018
10-Month
42.79°F
(5.99°C)
40.84°F
(4.91°C)
1.95°F
(1.08°C)
118th Coolest
Coolest since:
1917
10th Warmest
Warmest since:
2016
Nov 2017–Sep 2018
11-Month
41.98°F
(5.54°C)
39.92°F
(4.40°C)
2.06°F
(1.14°C)
120th Coolest
Coolest since:
1917
8th Warmest
Warmest since:
2016
Oct 2017–Sep 2018
12-Month
42.06°F
(5.59°C)
40.05°F
(4.47°C)
2.01°F
(1.12°C)
117th Coolest
Coolest since:
1917
11th Warmest
Warmest since:
2016
Ties: 2020
Apr 2017–Sep 2018
18-Month
46.00°F
(7.78°C)
44.09°F
(6.72°C)
1.91°F
(1.06°C)
122nd Coolest
Coolest since:
1917
6th Warmest
Warmest since:
2016
Oct 2016–Sep 2018
24-Month
42.59°F
(5.88°C)
40.03°F
(4.46°C)
2.56°F
(1.42°C)
124th Coolest
Coolest since:
1918
3rd Warmest
Warmest since:
2017
Oct 2015–Sep 2018
36-Month
42.87°F
(6.04°C)
40.03°F
(4.46°C)
2.84°F
(1.58°C)
125th Coolest
Coolest since:
1918
1st Warmest
Warmest since:
2017, 2018
Ties: 2017
Oct 2014–Sep 2018
48-Month
42.67°F
(5.93°C)
40.01°F
(4.45°C)
2.66°F
(1.48°C)
124th Coolest
Coolest since:
1918
1st Warmest
Warmest to Date
2018
Oct 2013–Sep 2018
60-Month
42.15°F
(5.64°C)
40.00°F
(4.44°C)
2.15°F
(1.20°C)
120th Coolest
Coolest since:
1920
4th Warmest
Warmest to Date
2019, 2020

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