Statewide Rankings

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Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Delaware

Precipitation Rankings, May 1939

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
May 1939 1-Month	0.73" (18.54mm)	3.56" (90.42mm)	-2.83" (-71.88mm)	3rd Driest	Driest since: 1911	1964
May 1939 1-Month	0.73" (18.54mm)	3.56" (90.42mm)	-2.83" (-71.88mm)	126th Wettest	Wettest since: 1938	1948
Apr–May 1939 2-Month	6.49" (164.85mm)	7.04" (178.82mm)	-0.55" (-13.97mm)	53rd Driest	Driest since: 1938	1942
	6.49" (164.85mm)	7.04" (178.82mm)	-0.55" (-13.97mm)	76th Wettest	Wettest since: 1937	1948
	Ties: 1949
Mar–May 1939 3-Month	11.72" (297.69mm)	11.01" (279.65mm)	0.71" (18.04mm)	87th Driest	Driest since: 1938	1986
Mar–May 1939 3-Month	11.72" (297.69mm)	11.01" (279.65mm)	0.71" (18.04mm)	42nd Wettest	Wettest since: 1934	1983
Feb–May 1939 4-Month	17.21" (437.13mm)	14.06" (357.12mm)	3.15" (80.01mm)	112th Driest	Driest since: 1938	2006
Feb–May 1939 4-Month	17.21" (437.13mm)	14.06" (357.12mm)	3.15" (80.01mm)	17th Wettest	Wettest since: 1934	1983
Jan–May 1939 5-Month	20.97" (532.64mm)	17.55" (445.77mm)	3.42" (86.87mm)	110th Driest	Driest since: 1938	2012
	20.97" (532.64mm)	17.55" (445.77mm)	3.42" (86.87mm)	19th Wettest	Wettest since: 1937	1948
	Ties: 1936
Dec 1938–May 1939 6-Month	23.76" (603.50mm)	21.01" (533.65mm)	2.75" (69.85mm)	100th Driest	Driest since: 1938	1986
	23.76" (603.50mm)	21.01" (533.65mm)	2.75" (69.85mm)	28th Wettest	Wettest since: 1937	1984
	Ties: 1923
Nov 1938–May 1939 7-Month	27.02" (686.31mm)	24.08" (611.63mm)	2.94" (74.68mm)	99th Driest	Driest since: 1938	1977
Nov 1938–May 1939 7-Month	27.02" (686.31mm)	24.08" (611.63mm)	2.94" (74.68mm)	29th Wettest	Wettest since: 1937	1984
Oct 1938–May 1939 8-Month	29.54" (750.32mm)	27.23" (691.64mm)	2.31" (58.68mm)	95th Driest	Driest since: 1938	2002
Oct 1938–May 1939 8-Month	29.54" (750.32mm)	27.23" (691.64mm)	2.31" (58.68mm)	33rd Wettest	Wettest since: 1937	1984
Sep 1938–May 1939 9-Month	37.39" (949.71mm)	30.82" (782.83mm)	6.57" (166.88mm)	110th Driest	Driest since: 1938	2002
Sep 1938–May 1939 9-Month	37.39" (949.71mm)	30.82" (782.83mm)	6.57" (166.88mm)	18th Wettest	Wettest since: 1936	1984
Aug 1938–May 1939 10-Month	40.41" (1,026.41mm)	35.41" (899.41mm)	5.00" (127.00mm)	101st Driest	Driest since: 1938	1985
Aug 1938–May 1939 10-Month	40.41" (1,026.41mm)	35.41" (899.41mm)	5.00" (127.00mm)	27th Wettest	Wettest since: 1937	2010
Jul 1938–May 1939 11-Month	51.13" (1,298.70mm)	39.69" (1,008.13mm)	11.44" (290.57mm)	124th Driest	Driest since: 1938	1931
Jul 1938–May 1939 11-Month	51.13" (1,298.70mm)	39.69" (1,008.13mm)	11.44" (290.57mm)	4th Wettest	Wettest to Date	2021
Jun 1938–May 1939 12-Month	56.05" (1,423.67mm)	43.32" (1,100.33mm)	12.73" (323.34mm)	124th Driest	Driest since: 1938	1965
Jun 1938–May 1939 12-Month	56.05" (1,423.67mm)	43.32" (1,100.33mm)	12.73" (323.34mm)	4th Wettest	Wettest to Date	2010
Dec 1937–May 1939 18-Month	71.87" (1,825.50mm)	64.29" (1,632.97mm)	7.58" (192.53mm)	103rd Driest	Driest since: 1935	1931
Dec 1937–May 1939 18-Month	71.87" (1,825.50mm)	64.29" (1,632.97mm)	7.58" (192.53mm)	24th Wettest	Wettest since: 1938	1949
Jun 1937–May 1939 24-Month	100.34" (2,548.64mm)	86.54" (2,198.12mm)	13.80" (350.52mm)	114th Driest	Driest since: 1938	1931
Jun 1937–May 1939 24-Month	100.34" (2,548.64mm)	86.54" (2,198.12mm)	13.80" (350.52mm)	13th Wettest	Wettest since: 1937	2019
Jun 1936–May 1939 36-Month	149.95" (3,808.73mm)	129.85" (3,298.19mm)	20.10" (510.54mm)	120th Driest	Driest since: 1938	1967
Jun 1936–May 1939 36-Month	149.95" (3,808.73mm)	129.85" (3,298.19mm)	20.10" (510.54mm)	6th Wettest	Wettest since: 1937	2005
Jun 1935–May 1939 48-Month	205.94" (5,230.88mm)	173.12" (4,397.25mm)	32.82" (833.63mm)	124th Driest	Driest since: 1938	1966
Jun 1935–May 1939 48-Month	205.94" (5,230.88mm)	173.12" (4,397.25mm)	32.82" (833.63mm)	1st Wettest	Wettest to Date	1939
Jun 1934–May 1939 60-Month	252.05" (6,402.07mm)	216.25" (5,492.75mm)	35.80" (909.32mm)	123rd Driest	Driest since: 1938	1967
Jun 1934–May 1939 60-Month	252.05" (6,402.07mm)	216.25" (5,492.75mm)	35.80" (909.32mm)	1st Wettest	Wettest to Date	1939

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published January 2023, retrieved on January 31, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings