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.

Precipitation Rankings, May 1977

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Record Driest
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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
May 1977 1-Month	2.67" (67.82mm)	2.91" (73.91mm)	-0.24" (-6.09mm)	40th Driest	Driest since: 1970	1934
	2.67" (67.82mm)	2.91" (73.91mm)	-0.24" (-6.09mm)	89th Wettest	Wettest since: 1976	2019
	Ties: 1941
Apr–May 1977 2-Month	4.94" (125.48mm)	5.43" (137.92mm)	-0.49" (-12.44mm)	31st Driest	Driest since: 1971	1934
Apr–May 1977 2-Month	4.94" (125.48mm)	5.43" (137.92mm)	-0.49" (-12.44mm)	98th Wettest	Wettest since: 1976	1957
Mar–May 1977 3-Month	8.04" (204.22mm)	7.94" (201.68mm)	0.10" (2.54mm)	72nd Driest	Driest since: 1976	1925
Mar–May 1977 3-Month	8.04" (204.22mm)	7.94" (201.68mm)	0.10" (2.54mm)	57th Wettest	Wettest since: 1975	1957, 1991
Feb–May 1977 4-Month	9.27" (235.46mm)	10.07" (255.78mm)	-0.80" (-20.32mm)	27th Driest	Driest since: 1972	1925
Feb–May 1977 4-Month	9.27" (235.46mm)	10.07" (255.78mm)	-0.80" (-20.32mm)	102nd Wettest	Wettest since: 1976	2019
Jan–May 1977 5-Month	10.85" (275.59mm)	12.39" (314.71mm)	-1.54" (-39.12mm)	11th Driest	Driest since: 1963	1934
Jan–May 1977 5-Month	10.85" (275.59mm)	12.39" (314.71mm)	-1.54" (-39.12mm)	118th Wettest	Wettest since: 1976	2019
Dec 1976–May 1977 6-Month	12.21" (310.13mm)	14.73" (374.14mm)	-2.52" (-64.01mm)	4th Driest	Driest since: 1963	1931
Dec 1976–May 1977 6-Month	12.21" (310.13mm)	14.73" (374.14mm)	-2.52" (-64.01mm)	124th Wettest	Wettest since: 1976	2019
Nov 1976–May 1977 7-Month	13.32" (338.33mm)	16.96" (430.78mm)	-3.64" (-92.45mm)	2nd Driest	Driest since: 1934	1934
Nov 1976–May 1977 7-Month	13.32" (338.33mm)	16.96" (430.78mm)	-3.64" (-92.45mm)	126th Wettest	Wettest since: 1976	1983
Oct 1976–May 1977 8-Month	15.76" (400.30mm)	19.13" (485.90mm)	-3.37" (-85.60mm)	4th Driest	Driest since: 1934	1934
Oct 1976–May 1977 8-Month	15.76" (400.30mm)	19.13" (485.90mm)	-3.37" (-85.60mm)	124th Wettest	Wettest since: 1976	2019
Sep 1976–May 1977 9-Month	18.21" (462.53mm)	21.62" (549.15mm)	-3.41" (-86.62mm)	4th Driest	Driest since: 1934	1934
Sep 1976–May 1977 9-Month	18.21" (462.53mm)	21.62" (549.15mm)	-3.41" (-86.62mm)	124th Wettest	Wettest since: 1976	2019
Aug 1976–May 1977 10-Month	20.21" (513.33mm)	24.25" (615.95mm)	-4.04" (-102.62mm)	3rd Driest	Driest since: 1934	1918
Aug 1976–May 1977 10-Month	20.21" (513.33mm)	24.25" (615.95mm)	-4.04" (-102.62mm)	125th Wettest	Wettest since: 1976	2019
Jul 1976–May 1977 11-Month	22.95" (582.93mm)	27.03" (686.56mm)	-4.08" (-103.63mm)	5th Driest	Driest since: 1934	1931
Jul 1976–May 1977 11-Month	22.95" (582.93mm)	27.03" (686.56mm)	-4.08" (-103.63mm)	123rd Wettest	Wettest since: 1976	2019
Jun 1976–May 1977 12-Month	25.72" (653.29mm)	29.95" (760.73mm)	-4.23" (-107.44mm)	5th Driest	Driest since: 1934	1934
Jun 1976–May 1977 12-Month	25.72" (653.29mm)	29.95" (760.73mm)	-4.23" (-107.44mm)	123rd Wettest	Wettest since: 1976	2019
Dec 1975–May 1977 18-Month	39.27" (997.46mm)	44.70" (1,135.38mm)	-5.43" (-137.92mm)	5th Driest	Driest since: 1931	1931
Dec 1975–May 1977 18-Month	39.27" (997.46mm)	44.70" (1,135.38mm)	-5.43" (-137.92mm)	122nd Wettest	Wettest since: 1976	2019
Jun 1975–May 1977 24-Month	55.62" (1,412.75mm)	59.92" (1,521.97mm)	-4.30" (-109.22mm)	17th Driest	Driest since: 1964	1931
Jun 1975–May 1977 24-Month	55.62" (1,412.75mm)	59.92" (1,521.97mm)	-4.30" (-109.22mm)	110th Wettest	Wettest since: 1976	2020
Jun 1974–May 1977 36-Month	87.73" (2,228.34mm)	89.88" (2,282.95mm)	-2.15" (-54.61mm)	39th Driest	Driest since: 1968	1955
	87.73" (2,228.34mm)	89.88" (2,282.95mm)	-2.15" (-54.61mm)	87th Wettest	Wettest since: 1976	2019
	Ties: 1938
Jun 1973–May 1977 48-Month	120.97" (3,072.64mm)	119.78" (3,042.41mm)	1.19" (30.23mm)	69th Driest	Driest since: 1972	1956
Jun 1973–May 1977 48-Month	120.97" (3,072.64mm)	119.78" (3,042.41mm)	1.19" (30.23mm)	56th Wettest	Wettest since: 1976	2019
Jun 1972–May 1977 60-Month	156.00" (3,962.40mm)	149.64" (3,800.86mm)	6.36" (161.54mm)	102nd Driest	Driest since: 1973	1957
Jun 1972–May 1977 60-Month	156.00" (3,962.40mm)	149.64" (3,800.86mm)	6.36" (161.54mm)	22nd Wettest	Wettest since: 1976	2020

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