National Rankings

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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

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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: 2017	1918
September 2018 1-Month	55.71°F (13.17°C)	51.90°F (11.06°C)	3.81°F (2.11°C)	4th Warmest	Warmest since: 2015	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: 2017	1974
Aug–Sep 2018 2-Month	58.38°F (14.66°C)	55.48°F (13.04°C)	2.90°F (1.62°C)	4th Warmest	Warmest since: 1998	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: 2017	1924
Jul–Sep 2018 3-Month	59.81°F (15.45°C)	57.16°F (13.98°C)	2.65°F (1.47°C)	4th Warmest	Warmest since: 1998	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: 2017	1903
Jun–Sep 2018 4-Month	59.59°F (15.33°C)	56.78°F (13.77°C)	2.81°F (1.56°C)	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: 2017	1907, 1924
May–Sep 2018 5-Month	58.19°F (14.55°C)	54.91°F (12.73°C)	3.28°F (1.82°C)	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: 2017	1907
Apr–Sep 2018 6-Month	54.53°F (12.52°C)	52.20°F (11.22°C)	2.33°F (1.30°C)	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: 2017	1917
Mar–Sep 2018 7-Month	51.23°F (10.68°C)	49.02°F (9.46°C)	2.21°F (1.22°C)	5th Warmest	Warmest since: 2016	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: 2015	1917
Feb–Sep 2018 8-Month	47.87°F (8.82°C)	45.75°F (7.64°C)	2.12°F (1.18°C)	5th Warmest	Warmest since: 2017	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: 2015	1917
Jan–Sep 2018 9-Month	44.90°F (7.17°C)	42.86°F (6.03°C)	2.04°F (1.14°C)	9th Warmest	Warmest since: 2017	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: 2014	1917
Dec 2017–Sep 2018 10-Month	42.79°F (5.99°C)	40.84°F (4.91°C)	1.95°F (1.08°C)	10th Warmest	Warmest since: 2017	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: 2015	1917
Nov 2017–Sep 2018 11-Month	41.98°F (5.54°C)	39.92°F (4.40°C)	2.06°F (1.14°C)	8th Warmest	Warmest since: 2017	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: 2014	1917
	42.06°F (5.59°C)	40.05°F (4.47°C)	2.01°F (1.12°C)	11th Warmest	Warmest since: 2017	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: 2015	1917
Apr 2017–Sep 2018 18-Month	46.00°F (7.78°C)	44.09°F (6.72°C)	1.91°F (1.06°C)	6th Warmest	Warmest since: 2017	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: 2015	1918
Oct 2016–Sep 2018 24-Month	42.59°F (5.88°C)	40.03°F (4.46°C)	2.56°F (1.42°C)	3rd Warmest	Warmest since: 2017	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: 2017	1918
	42.87°F (6.04°C)	40.03°F (4.46°C)	2.84°F (1.58°C)	1st Warmest	Warmest since: 2017	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: 2017	1918
Oct 2014–Sep 2018 48-Month	42.67°F (5.93°C)	40.01°F (4.45°C)	2.66°F (1.48°C)	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: 2017	1920
Oct 2013–Sep 2018 60-Month	42.15°F (5.64°C)	40.00°F (4.44°C)	2.15°F (1.20°C)	4th Warmest	Warmest to Date	2019, 2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on January 29, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings