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 1918

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
April 1918 1-Month	2.82" (71.63mm)	2.52" (64.01mm)	0.30" (7.62mm)	92nd Driest	Driest since: 1917	1987
	2.82" (71.63mm)	2.52" (64.01mm)	0.30" (7.62mm)	37th Wettest	Wettest since: 1912	1957
	Ties: 1994
Mar–Apr 1918 2-Month	4.67" (118.62mm)	5.03" (127.76mm)	-0.36" (-9.14mm)	43rd Driest	Driest since: 1916	1910
	4.67" (118.62mm)	5.03" (127.76mm)	-0.36" (-9.14mm)	86th Wettest	Wettest since: 1917	1973
	Ties: 2001
Feb–Apr 1918 3-Month	6.39" (162.31mm)	7.16" (181.86mm)	-0.77" (-19.55mm)	20th Driest	Driest since: 1916	1910
	6.39" (162.31mm)	7.16" (181.86mm)	-0.77" (-19.55mm)	109th Wettest	Wettest since: 1917	1983
	Ties: 1946
Jan–Apr 1918 4-Month	8.80" (223.52mm)	9.48" (240.79mm)	-0.68" (-17.27mm)	36th Driest	Driest since: 1910	1910
	8.80" (223.52mm)	9.48" (240.79mm)	-0.68" (-17.27mm)	93rd Wettest	Wettest since: 1917	1998
	Ties: 1966
Dec 1917–Apr 1918 5-Month	10.46" (265.68mm)	11.82" (300.23mm)	-1.36" (-34.55mm)	14th Driest	Driest since: 1910	1931
	10.46" (265.68mm)	11.82" (300.23mm)	-1.36" (-34.55mm)	114th Wettest	Wettest since: 1917	1983
	Ties: 1985
Nov 1917–Apr 1918 6-Month	11.41" (289.81mm)	14.05" (356.87mm)	-2.64" (-67.06mm)	5th Driest	Driest since: 1918	1977
Nov 1917–Apr 1918 6-Month	11.41" (289.81mm)	14.05" (356.87mm)	-2.64" (-67.06mm)	123rd Wettest	Wettest since: 1917	1983
Oct 1917–Apr 1918 7-Month	12.79" (324.87mm)	16.22" (411.99mm)	-3.43" (-87.12mm)	2nd Driest	Driest since: 1918	1981
Oct 1917–Apr 1918 7-Month	12.79" (324.87mm)	16.22" (411.99mm)	-3.43" (-87.12mm)	126th Wettest	Wettest since: 1917	1983
Sep 1917–Apr 1918 8-Month	14.96" (379.98mm)	18.71" (475.23mm)	-3.75" (-95.25mm)	1st Driest	Driest since: 1918	1918
Sep 1917–Apr 1918 8-Month	14.96" (379.98mm)	18.71" (475.23mm)	-3.75" (-95.25mm)	127th Wettest	Wettest since: 1917	2019
Aug 1917–Apr 1918 9-Month	17.40" (441.96mm)	21.33" (541.78mm)	-3.93" (-99.82mm)	1st Driest	Driest since: 1918	1918
Aug 1917–Apr 1918 9-Month	17.40" (441.96mm)	21.33" (541.78mm)	-3.93" (-99.82mm)	127th Wettest	Wettest since: 1917	2019
Jul 1917–Apr 1918 10-Month	19.91" (505.71mm)	24.12" (612.65mm)	-4.21" (-106.94mm)	2nd Driest	Driest since: 1918	1931
Jul 1917–Apr 1918 10-Month	19.91" (505.71mm)	24.12" (612.65mm)	-4.21" (-106.94mm)	126th Wettest	Wettest since: 1917	2019
Jun 1917–Apr 1918 11-Month	22.35" (567.69mm)	27.04" (686.82mm)	-4.69" (-119.13mm)	2nd Driest	Driest since: 1918	1931
Jun 1917–Apr 1918 11-Month	22.35" (567.69mm)	27.04" (686.82mm)	-4.69" (-119.13mm)	126th Wettest	Wettest since: 1917	2019
May 1917–Apr 1918 12-Month	24.99" (634.75mm)	29.95" (760.73mm)	-4.96" (-125.98mm)	1st Driest	Driest since: 1918	1918
May 1917–Apr 1918 12-Month	24.99" (634.75mm)	29.95" (760.73mm)	-4.96" (-125.98mm)	127th Wettest	Wettest since: 1917	2019
Nov 1916–Apr 1918 18-Month	37.84" (961.14mm)	44.02" (1,118.11mm)	-6.18" (-156.97mm)	2nd Driest	Driest since: 1918	1931
Nov 1916–Apr 1918 18-Month	37.84" (961.14mm)	44.02" (1,118.11mm)	-6.18" (-156.97mm)	125th Wettest	Wettest since: 1917	2020
May 1916–Apr 1918 24-Month	53.79" (1,366.27mm)	59.92" (1,521.97mm)	-6.13" (-155.70mm)	5th Driest	Driest since: 1918	1955
May 1916–Apr 1918 24-Month	53.79" (1,366.27mm)	59.92" (1,521.97mm)	-6.13" (-155.70mm)	122nd Wettest	Wettest since: 1917	2020
May 1915–Apr 1918 36-Month	86.99" (2,209.55mm)	89.88" (2,282.95mm)	-2.89" (-73.40mm)	34th Driest	Driest since: 1912	1955
May 1915–Apr 1918 36-Month	86.99" (2,209.55mm)	89.88" (2,282.95mm)	-2.89" (-73.40mm)	92nd Wettest	Wettest since: 1917	2020
May 1914–Apr 1918 48-Month	115.99" (2,946.15mm)	119.77" (3,042.16mm)	-3.78" (-96.01mm)	26th Driest	Driest since: 1913	1956
	115.99" (2,946.15mm)	119.77" (3,042.16mm)	-3.78" (-96.01mm)	99th Wettest	Wettest since: 1917	2019
	Ties: 1938
May 1913–Apr 1918 60-Month	145.18" (3,687.57mm)	149.63" (3,800.60mm)	-4.45" (-113.03mm)	25th Driest	Driest since: 1914	1957
	145.18" (3,687.57mm)	149.63" (3,800.60mm)	-4.45" (-113.03mm)	99th Wettest	Wettest since: 1917	2020
	Ties: 2003

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on February 5, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings