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, September 1947

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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
September 1947 1-Month	3.48" (88.39mm)	3.60" (91.44mm)	-0.12" (-3.05mm)	68th Driest	Driest since: 1946	1941
	3.48" (88.39mm)	3.60" (91.44mm)	-0.12" (-3.05mm)	61st Wettest	Wettest since: 1945	1935
	Ties: 1923
Aug–Sep 1947 2-Month	6.48" (164.59mm)	8.19" (208.03mm)	-1.71" (-43.44mm)	41st Driest	Driest since: 1943	2005
Aug–Sep 1947 2-Month	6.48" (164.59mm)	8.19" (208.03mm)	-1.71" (-43.44mm)	88th Wettest	Wettest since: 1946	1928
Jul–Sep 1947 3-Month	9.93" (252.22mm)	12.51" (317.75mm)	-2.58" (-65.53mm)	36th Driest	Driest since: 1943	1968
Jul–Sep 1947 3-Month	9.93" (252.22mm)	12.51" (317.75mm)	-2.58" (-65.53mm)	93rd Wettest	Wettest since: 1946	1938
Jun–Sep 1947 4-Month	13.22" (335.79mm)	16.14" (409.96mm)	-2.92" (-74.17mm)	33rd Driest	Driest since: 1943	1968
Jun–Sep 1947 4-Month	13.22" (335.79mm)	16.14" (409.96mm)	-2.92" (-74.17mm)	96th Wettest	Wettest since: 1946	1938
May–Sep 1947 5-Month	18.63" (473.20mm)	19.70" (500.38mm)	-1.07" (-27.18mm)	54th Driest	Driest since: 1944	1964
May–Sep 1947 5-Month	18.63" (473.20mm)	19.70" (500.38mm)	-1.07" (-27.18mm)	75th Wettest	Wettest since: 1946	1989
Apr–Sep 1947 6-Month	22.30" (566.42mm)	23.18" (588.77mm)	-0.88" (-22.35mm)	62nd Driest	Driest since: 1944	1986
Apr–Sep 1947 6-Month	22.30" (566.42mm)	23.18" (588.77mm)	-0.88" (-22.35mm)	67th Wettest	Wettest since: 1946	1989
Mar–Sep 1947 7-Month	24.09" (611.89mm)	27.16" (689.86mm)	-3.07" (-77.97mm)	35th Driest	Driest since: 1943	1986
	24.09" (611.89mm)	27.16" (689.86mm)	-3.07" (-77.97mm)	94th Wettest	Wettest since: 1946	1989
	Ties: 2010
Feb–Sep 1947 8-Month	25.45" (646.43mm)	30.20" (767.08mm)	-4.75" (-120.65mm)	23rd Driest	Driest since: 1943	1930
Feb–Sep 1947 8-Month	25.45" (646.43mm)	30.20" (767.08mm)	-4.75" (-120.65mm)	106th Wettest	Wettest since: 1946	1989
Jan–Sep 1947 9-Month	30.16" (766.06mm)	33.69" (855.73mm)	-3.53" (-89.67mm)	33rd Driest	Driest since: 1943	1930
Jan–Sep 1947 9-Month	30.16" (766.06mm)	33.69" (855.73mm)	-3.53" (-89.67mm)	96th Wettest	Wettest since: 1946	1989
Dec 1946–Sep 1947 10-Month	32.24" (818.90mm)	37.15" (943.61mm)	-4.91" (-124.71mm)	27th Driest	Driest since: 1943	1986
Dec 1946–Sep 1947 10-Month	32.24" (818.90mm)	37.15" (943.61mm)	-4.91" (-124.71mm)	101st Wettest	Wettest since: 1946	1958
Nov 1946–Sep 1947 11-Month	34.07" (865.38mm)	40.22" (1,021.59mm)	-6.15" (-156.21mm)	20th Driest	Driest since: 1943	1930
Nov 1946–Sep 1947 11-Month	34.07" (865.38mm)	40.22" (1,021.59mm)	-6.15" (-156.21mm)	108th Wettest	Wettest since: 1946	1958
Oct 1946–Sep 1947 12-Month	36.06" (915.92mm)	43.37" (1,101.60mm)	-7.31" (-185.68mm)	15th Driest	Driest since: 1930	1986
Oct 1946–Sep 1947 12-Month	36.06" (915.92mm)	43.37" (1,101.60mm)	-7.31" (-185.68mm)	113th Wettest	Wettest since: 1946	2003
Apr 1946–Sep 1947 18-Month	59.85" (1,520.19mm)	66.48" (1,688.59mm)	-6.63" (-168.40mm)	25th Driest	Driest since: 1943	1966
Apr 1946–Sep 1947 18-Month	59.85" (1,520.19mm)	66.48" (1,688.59mm)	-6.63" (-168.40mm)	103rd Wettest	Wettest since: 1946	2010
Oct 1945–Sep 1947 24-Month	80.54" (2,045.72mm)	86.63" (2,200.40mm)	-6.09" (-154.68mm)	30th Driest	Driest since: 1944	1966
Oct 1945–Sep 1947 24-Month	80.54" (2,045.72mm)	86.63" (2,200.40mm)	-6.09" (-154.68mm)	97th Wettest	Wettest since: 1946	2004
Oct 1944–Sep 1947 36-Month	130.72" (3,320.29mm)	129.92" (3,299.97mm)	0.80" (20.32mm)	57th Driest	Driest since: 1945	1966
Oct 1944–Sep 1947 36-Month	130.72" (3,320.29mm)	129.92" (3,299.97mm)	0.80" (20.32mm)	69th Wettest	Wettest since: 1946	1935
Oct 1943–Sep 1947 48-Month	174.05" (4,420.87mm)	173.15" (4,398.01mm)	0.90" (22.86mm)	52nd Driest	Driest since: 1945	1966
Oct 1943–Sep 1947 48-Month	174.05" (4,420.87mm)	173.15" (4,398.01mm)	0.90" (22.86mm)	73rd Wettest	Wettest since: 1946	1936
Oct 1942–Sep 1947 60-Month	211.25" (5,365.75mm)	216.34" (5,495.04mm)	-5.09" (-129.29mm)	35th Driest	Driest since: 1945	1966
Oct 1942–Sep 1947 60-Month	211.25" (5,365.75mm)	216.34" (5,495.04mm)	-5.09" (-129.29mm)	89th Wettest	Wettest since: 1946	1937

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2023, retrieved on March 26, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings