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, April 1975

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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
April 1975 1-Month	2.67" (67.82mm)	2.52" (64.01mm)	0.15" (3.81mm)	81st Driest	Driest since: 1974	1987
	2.67" (67.82mm)	2.52" (64.01mm)	0.15" (3.81mm)	48th Wettest	Wettest since: 1973	1957
	Ties: 1967
Mar–Apr 1975 2-Month	6.07" (154.18mm)	5.03" (127.76mm)	1.04" (26.42mm)	116th Driest	Driest since: 1974	1910
Mar–Apr 1975 2-Month	6.07" (154.18mm)	5.03" (127.76mm)	1.04" (26.42mm)	13th Wettest	Wettest since: 1973	1973
Feb–Apr 1975 3-Month	8.68" (220.47mm)	7.16" (181.86mm)	1.52" (38.61mm)	120th Driest	Driest since: 1974	1910
Feb–Apr 1975 3-Month	8.68" (220.47mm)	7.16" (181.86mm)	1.52" (38.61mm)	9th Wettest	Wettest since: 1973	1983
Jan–Apr 1975 4-Month	11.29" (286.77mm)	9.48" (240.79mm)	1.81" (45.98mm)	123rd Driest	Driest since: 1974	1910
	11.29" (286.77mm)	9.48" (240.79mm)	1.81" (45.98mm)	6th Wettest	Wettest since: 1973	1998
	Ties: 2019
Dec 1974–Apr 1975 5-Month	13.71" (348.23mm)	11.82" (300.23mm)	1.89" (48.00mm)	118th Driest	Driest since: 1974	1931
Dec 1974–Apr 1975 5-Month	13.71" (348.23mm)	11.82" (300.23mm)	1.89" (48.00mm)	10th Wettest	Wettest since: 1973	1983
Nov 1974–Apr 1975 6-Month	15.89" (403.61mm)	14.05" (356.87mm)	1.84" (46.74mm)	113th Driest	Driest since: 1972	1977
Nov 1974–Apr 1975 6-Month	15.89" (403.61mm)	14.05" (356.87mm)	1.84" (46.74mm)	15th Wettest	Wettest since: 1974	1983
Oct 1974–Apr 1975 7-Month	17.90" (454.66mm)	16.22" (411.99mm)	1.68" (42.67mm)	105th Driest	Driest since: 1972	1981
Oct 1974–Apr 1975 7-Month	17.90" (454.66mm)	16.22" (411.99mm)	1.68" (42.67mm)	23rd Wettest	Wettest since: 1974	1983
Sep 1974–Apr 1975 8-Month	20.62" (523.75mm)	18.71" (475.23mm)	1.91" (48.52mm)	107th Driest	Driest since: 1972	1918
Sep 1974–Apr 1975 8-Month	20.62" (523.75mm)	18.71" (475.23mm)	1.91" (48.52mm)	21st Wettest	Wettest since: 1974	2019
Aug 1974–Apr 1975 9-Month	24.05" (610.87mm)	21.33" (541.78mm)	2.72" (69.09mm)	115th Driest	Driest since: 1972	1918
Aug 1974–Apr 1975 9-Month	24.05" (610.87mm)	21.33" (541.78mm)	2.72" (69.09mm)	13th Wettest	Wettest since: 1974	2019
Jul 1974–Apr 1975 10-Month	26.19" (665.23mm)	24.12" (612.65mm)	2.07" (52.58mm)	108th Driest	Driest since: 1972	1931
Jul 1974–Apr 1975 10-Month	26.19" (665.23mm)	24.12" (612.65mm)	2.07" (52.58mm)	20th Wettest	Wettest since: 1974	2019
Jun 1974–Apr 1975 11-Month	28.83" (732.28mm)	27.04" (686.82mm)	1.79" (45.46mm)	102nd Driest	Driest since: 1972	1931
Jun 1974–Apr 1975 11-Month	28.83" (732.28mm)	27.04" (686.82mm)	1.79" (45.46mm)	26th Wettest	Wettest since: 1974	2019
May 1974–Apr 1975 12-Month	31.90" (810.26mm)	29.95" (760.73mm)	1.95" (49.53mm)	101st Driest	Driest since: 1972	1918
May 1974–Apr 1975 12-Month	31.90" (810.26mm)	29.95" (760.73mm)	1.95" (49.53mm)	27th Wettest	Wettest since: 1974	2019
Nov 1973–Apr 1975 18-Month	48.17" (1,223.52mm)	44.02" (1,118.11mm)	4.15" (105.41mm)	113th Driest	Driest since: 1972	1931
Nov 1973–Apr 1975 18-Month	48.17" (1,223.52mm)	44.02" (1,118.11mm)	4.15" (105.41mm)	14th Wettest	Wettest since: 1974	2020
May 1973–Apr 1975 24-Month	65.10" (1,653.54mm)	59.92" (1,521.97mm)	5.18" (131.57mm)	115th Driest	Driest since: 1972	1955
May 1973–Apr 1975 24-Month	65.10" (1,653.54mm)	59.92" (1,521.97mm)	5.18" (131.57mm)	12th Wettest	Wettest since: 1974	2020
May 1972–Apr 1975 36-Month	100.05" (2,541.27mm)	89.88" (2,282.95mm)	10.17" (258.32mm)	122nd Driest	Driest since: 1974	1955
	100.05" (2,541.27mm)	89.88" (2,282.95mm)	10.17" (258.32mm)	4th Wettest	Wettest to Date	2020
	Ties: 1999
May 1971–Apr 1975 48-Month	130.56" (3,316.22mm)	119.77" (3,042.16mm)	10.79" (274.06mm)	120th Driest	Driest since: 1974	1956
May 1971–Apr 1975 48-Month	130.56" (3,316.22mm)	119.77" (3,042.16mm)	10.79" (274.06mm)	5th Wettest	Wettest to Date	2019
May 1970–Apr 1975 60-Month	159.42" (4,049.27mm)	149.63" (3,800.60mm)	9.79" (248.67mm)	113th Driest	Driest since: 1974	1957
May 1970–Apr 1975 60-Month	159.42" (4,049.27mm)	149.63" (3,800.60mm)	9.79" (248.67mm)	11th Wettest	Wettest to Date	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published March 2023, retrieved on March 24, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings