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, May 1978

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Record Coolest
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Record Warmest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Warmest/Coolest Since	Record
May 1978 1-Month	47.61°F (8.67°C)	47.44°F (8.58°C)	0.17°F (0.09°C)	60th Coolest	Coolest since: 1976	1917
	47.61°F (8.67°C)	47.44°F (8.58°C)	0.17°F (0.09°C)	69th Warmest	Warmest since: 1977	2018
	Ties: 1938
Apr–May 1978 2-Month	43.69°F (6.49°C)	43.03°F (6.13°C)	0.66°F (0.36°C)	84th Coolest	Coolest since: 1976	1907
	43.69°F (6.49°C)	43.03°F (6.13°C)	0.66°F (0.36°C)	45th Warmest	Warmest since: 1977	2012
	Ties: 1914, 1957
Mar–May 1978 3-Month	39.09°F (3.94°C)	38.68°F (3.71°C)	0.41°F (0.23°C)	76th Coolest	Coolest since: 1976	1917
	39.09°F (3.94°C)	38.68°F (3.71°C)	0.41°F (0.23°C)	53rd Warmest	Warmest since: 1977	2012
	Ties: 1911
Feb–May 1978 4-Month	33.85°F (1.03°C)	34.72°F (1.51°C)	-0.87°F (-0.48°C)	29th Coolest	Coolest since: 1975	1917
Feb–May 1978 4-Month	33.85°F (1.03°C)	34.72°F (1.51°C)	-0.87°F (-0.48°C)	100th Warmest	Warmest since: 1977	2012
Jan–May 1978 5-Month	30.45°F (-0.86°C)	31.72°F (-0.16°C)	-1.27°F (-0.70°C)	15th Coolest	Coolest since: 1971	1917
Jan–May 1978 5-Month	30.45°F (-0.86°C)	31.72°F (-0.16°C)	-1.27°F (-0.70°C)	114th Warmest	Warmest since: 1977	2012
Dec 1977–May 1978 6-Month	29.26°F (-1.52°C)	30.21°F (-0.99°C)	-0.95°F (-0.53°C)	18th Coolest	Coolest since: 1971	1917
Dec 1977–May 1978 6-Month	29.26°F (-1.52°C)	30.21°F (-0.99°C)	-0.95°F (-0.53°C)	110th Warmest	Warmest since: 1977	2012
Nov 1977–May 1978 7-Month	29.70°F (-1.28°C)	30.28°F (-0.96°C)	-0.58°F (-0.32°C)	26th Coolest	Coolest since: 1977	1917
Nov 1977–May 1978 7-Month	29.70°F (-1.28°C)	30.28°F (-0.96°C)	-0.58°F (-0.32°C)	102nd Warmest	Warmest since: 1976	2012
Oct 1977–May 1978 8-Month	31.15°F (-0.47°C)	31.68°F (-0.18°C)	-0.53°F (-0.29°C)	28th Coolest	Coolest since: 1977	1917
Oct 1977–May 1978 8-Month	31.15°F (-0.47°C)	31.68°F (-0.18°C)	-0.53°F (-0.29°C)	100th Warmest	Warmest since: 1976	2016, 2017
Sep 1977–May 1978 9-Month	33.69°F (0.94°C)	33.92°F (1.07°C)	-0.23°F (-0.13°C)	45th Coolest	Coolest since: 1977	1917
Sep 1977–May 1978 9-Month	33.69°F (0.94°C)	33.92°F (1.07°C)	-0.23°F (-0.13°C)	83rd Warmest	Warmest since: 1976	2016
Aug 1977–May 1978 10-Month	36.28°F (2.38°C)	36.44°F (2.47°C)	-0.16°F (-0.09°C)	51st Coolest	Coolest since: 1977	1917
Aug 1977–May 1978 10-Month	36.28°F (2.38°C)	36.44°F (2.47°C)	-0.16°F (-0.09°C)	77th Warmest	Warmest since: 1976	2017
Jul 1977–May 1978 11-Month	38.56°F (3.64°C)	38.63°F (3.68°C)	-0.07°F (-0.04°C)	55th Coolest	Coolest since: 1977	1917
Jul 1977–May 1978 11-Month	38.56°F (3.64°C)	38.63°F (3.68°C)	-0.07°F (-0.04°C)	73rd Warmest	Warmest since: 1976	2017
Jun 1977–May 1978 12-Month	40.11°F (4.51°C)	40.04°F (4.47°C)	0.07°F (0.04°C)	62nd Coolest	Coolest since: 1977	1917
	40.11°F (4.51°C)	40.04°F (4.47°C)	0.07°F (0.04°C)	66th Warmest	Warmest since: 1976	2017
	Ties: 1902, 1940
Dec 1976–May 1978 18-Month	36.51°F (2.51°C)	36.76°F (2.64°C)	-0.25°F (-0.13°C)	42nd Coolest	Coolest since: 1977	1918
Dec 1976–May 1978 18-Month	36.51°F (2.51°C)	36.76°F (2.64°C)	-0.25°F (-0.13°C)	85th Warmest	Warmest since: 1976	2017
Jun 1976–May 1978 24-Month	39.33°F (4.07°C)	40.03°F (4.46°C)	-0.70°F (-0.39°C)	8th Coolest	Coolest since: 1930	1918
Jun 1976–May 1978 24-Month	39.33°F (4.07°C)	40.03°F (4.46°C)	-0.70°F (-0.39°C)	119th Warmest	Warmest since: 1977	2017
Jun 1975–May 1978 36-Month	39.63°F (4.24°C)	40.02°F (4.46°C)	-0.39°F (-0.22°C)	22nd Coolest	Coolest since: 1977	1918
Jun 1975–May 1978 36-Month	39.63°F (4.24°C)	40.02°F (4.46°C)	-0.39°F (-0.22°C)	104th Warmest	Warmest since: 1976	2017
Jun 1974–May 1978 48-Month	39.61°F (4.23°C)	40.01°F (4.45°C)	-0.40°F (-0.22°C)	21st Coolest	Coolest since: 1971	1918
	39.61°F (4.23°C)	40.01°F (4.45°C)	-0.40°F (-0.22°C)	104th Warmest	Warmest since: 1977	2018
	Ties: 1969, 1970
Jun 1973–May 1978 60-Month	39.88°F (4.38°C)	40.00°F (4.44°C)	-0.12°F (-0.06°C)	47th Coolest	Coolest since: 1977	1920
	39.88°F (4.38°C)	40.00°F (4.44°C)	-0.12°F (-0.06°C)	77th Warmest	Warmest since: 1976	2020
	Ties: 1949

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published May 2023, retrieved on June 6, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings