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 1938

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
April 1938 1-Month	2.69" (68.33mm)	2.52" (64.01mm)	0.17" (4.32mm)	85th Driest	Driest since: 1937	1987
	2.69" (68.33mm)	2.52" (64.01mm)	0.17" (4.32mm)	44th Wettest	Wettest since: 1935	1957
	Ties: 1908
Mar–Apr 1938 2-Month	5.99" (152.15mm)	5.03" (127.76mm)	0.96" (24.39mm)	114th Driest	Driest since: 1937	1910
Mar–Apr 1938 2-Month	5.99" (152.15mm)	5.03" (127.76mm)	0.96" (24.39mm)	15th Wettest	Wettest since: 1922	1973
Feb–Apr 1938 3-Month	8.40" (213.36mm)	7.16" (181.86mm)	1.24" (31.50mm)	117th Driest	Driest since: 1937	1910
Feb–Apr 1938 3-Month	8.40" (213.36mm)	7.16" (181.86mm)	1.24" (31.50mm)	12th Wettest	Wettest since: 1922	1983
Jan–Apr 1938 4-Month	10.51" (266.95mm)	9.47" (240.54mm)	1.04" (26.41mm)	109th Driest	Driest since: 1936	1910
Jan–Apr 1938 4-Month	10.51" (266.95mm)	9.47" (240.54mm)	1.04" (26.41mm)	20th Wettest	Wettest since: 1937	1998
Dec 1937–Apr 1938 5-Month	12.94" (328.68mm)	11.82" (300.23mm)	1.12" (28.45mm)	109th Driest	Driest since: 1936	1931
Dec 1937–Apr 1938 5-Month	12.94" (328.68mm)	11.82" (300.23mm)	1.12" (28.45mm)	19th Wettest	Wettest since: 1937	1983
Nov 1937–Apr 1938 6-Month	15.10" (383.54mm)	14.05" (356.87mm)	1.05" (26.67mm)	101st Driest	Driest since: 1937	1977
	15.10" (383.54mm)	14.05" (356.87mm)	1.05" (26.67mm)	27th Wettest	Wettest since: 1932	1983
	Ties: 2020
Oct 1937–Apr 1938 7-Month	17.71" (449.83mm)	16.22" (411.99mm)	1.49" (37.84mm)	102nd Driest	Driest since: 1937	1981
Oct 1937–Apr 1938 7-Month	17.71" (449.83mm)	16.22" (411.99mm)	1.49" (37.84mm)	26th Wettest	Wettest since: 1932	1983
Sep 1937–Apr 1938 8-Month	19.71" (500.63mm)	18.71" (475.23mm)	1.00" (25.40mm)	96th Driest	Driest since: 1937	1918
Sep 1937–Apr 1938 8-Month	19.71" (500.63mm)	18.71" (475.23mm)	1.00" (25.40mm)	32nd Wettest	Wettest since: 1932	2019
Aug 1937–Apr 1938 9-Month	22.26" (565.40mm)	21.33" (541.78mm)	0.93" (23.62mm)	90th Driest	Driest since: 1937	1918
Aug 1937–Apr 1938 9-Month	22.26" (565.40mm)	21.33" (541.78mm)	0.93" (23.62mm)	38th Wettest	Wettest since: 1932	2019
Jul 1937–Apr 1938 10-Month	24.88" (631.95mm)	24.12" (612.65mm)	0.76" (19.30mm)	86th Driest	Driest since: 1937	1931
	24.88" (631.95mm)	24.12" (612.65mm)	0.76" (19.30mm)	42nd Wettest	Wettest since: 1932	2019
	Ties: 1906
Jun 1937–Apr 1938 11-Month	27.99" (710.95mm)	27.04" (686.82mm)	0.95" (24.13mm)	88th Driest	Driest since: 1937	1931
Jun 1937–Apr 1938 11-Month	27.99" (710.95mm)	27.04" (686.82mm)	0.95" (24.13mm)	40th Wettest	Wettest since: 1929	2019
May 1937–Apr 1938 12-Month	30.32" (770.13mm)	29.95" (760.73mm)	0.37" (9.40mm)	65th Driest	Driest since: 1937	1918
May 1937–Apr 1938 12-Month	30.32" (770.13mm)	29.95" (760.73mm)	0.37" (9.40mm)	63rd Wettest	Wettest since: 1929	2019
Nov 1936–Apr 1938 18-Month	44.95" (1,141.73mm)	44.02" (1,118.11mm)	0.93" (23.62mm)	80th Driest	Driest since: 1937	1931
Nov 1936–Apr 1938 18-Month	44.95" (1,141.73mm)	44.02" (1,118.11mm)	0.93" (23.62mm)	47th Wettest	Wettest since: 1933	2020
May 1936–Apr 1938 24-Month	58.70" (1,490.98mm)	59.92" (1,521.97mm)	-1.22" (-30.99mm)	42nd Driest	Driest since: 1937	1955
May 1936–Apr 1938 24-Month	58.70" (1,490.98mm)	59.92" (1,521.97mm)	-1.22" (-30.99mm)	85th Wettest	Wettest since: 1933	2020
May 1935–Apr 1938 36-Month	88.21" (2,240.53mm)	89.88" (2,282.95mm)	-1.67" (-42.42mm)	42nd Driest	Driest since: 1937	1955
May 1935–Apr 1938 36-Month	88.21" (2,240.53mm)	89.88" (2,282.95mm)	-1.67" (-42.42mm)	84th Wettest	Wettest since: 1930	2020
May 1934–Apr 1938 48-Month	115.99" (2,946.15mm)	119.77" (3,042.16mm)	-3.78" (-96.01mm)	26th Driest	Driest since: 1937	1956
	115.99" (2,946.15mm)	119.77" (3,042.16mm)	-3.78" (-96.01mm)	99th Wettest	Wettest since: 1930	2019
	Ties: 1918
May 1933–Apr 1938 60-Month	141.87" (3,603.50mm)	149.63" (3,800.60mm)	-7.76" (-197.10mm)	9th Driest	Driest since: 1937	1957
May 1933–Apr 1938 60-Month	141.87" (3,603.50mm)	149.63" (3,800.60mm)	-7.76" (-197.10mm)	115th Wettest	Wettest since: 1936	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published November 2022, retrieved on November 28, 2022 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings