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, July 2011

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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
July 2011 1-Month	2.44" (61.98mm)	2.78" (70.61mm)	-0.34" (-8.63mm)	19th Driest	Driest since: 2000	1930
July 2011 1-Month	2.44" (61.98mm)	2.78" (70.61mm)	-0.34" (-8.63mm)	110th Wettest	Wettest since: 2010	1950, 1958
Jun–Jul 2011 2-Month	5.02" (127.51mm)	5.70" (144.78mm)	-0.68" (-17.27mm)	17th Driest	Driest since: 2006	1930
	5.02" (127.51mm)	5.70" (144.78mm)	-0.68" (-17.27mm)	112th Wettest	Wettest since: 2010	1928
	Ties: 2006
May–Jul 2011 3-Month	8.45" (214.63mm)	8.62" (218.95mm)	-0.17" (-4.32mm)	45th Driest	Driest since: 2006	1988
	8.45" (214.63mm)	8.62" (218.95mm)	-0.17" (-4.32mm)	84th Wettest	Wettest since: 2010	2015
	Ties: 1953, 1971
Apr–Jul 2011 4-Month	11.87" (301.50mm)	11.13" (282.70mm)	0.74" (18.80mm)	92nd Driest	Driest since: 2008	1934
	11.87" (301.50mm)	11.13" (282.70mm)	0.74" (18.80mm)	37th Wettest	Wettest since: 2010	2015
	Ties: 1996
Mar–Jul 2011 5-Month	14.78" (375.41mm)	13.64" (346.46mm)	1.14" (28.95mm)	105th Driest	Driest since: 2008	1936
Mar–Jul 2011 5-Month	14.78" (375.41mm)	13.64" (346.46mm)	1.14" (28.95mm)	24th Wettest	Wettest since: 2010	1973
Feb–Jul 2011 6-Month	16.76" (425.70mm)	15.78" (400.81mm)	0.98" (24.89mm)	95th Driest	Driest since: 2009	1934
	16.76" (425.70mm)	15.78" (400.81mm)	0.98" (24.89mm)	34th Wettest	Wettest since: 2010	2019
	Ties: 1897, 1900
Jan–Jul 2011 7-Month	18.41" (467.61mm)	18.09" (459.49mm)	0.32" (8.12mm)	74th Driest	Driest since: 2009	1934
Jan–Jul 2011 7-Month	18.41" (467.61mm)	18.09" (459.49mm)	0.32" (8.12mm)	55th Wettest	Wettest since: 2010	2019
Dec 2010–Jul 2011 8-Month	20.86" (529.84mm)	20.44" (519.18mm)	0.42" (10.66mm)	71st Driest	Driest since: 2007	1931
	20.86" (529.84mm)	20.44" (519.18mm)	0.42" (10.66mm)	57th Wettest	Wettest since: 2010	2019
	Ties: 1900
Nov 2010–Jul 2011 9-Month	23.08" (586.23mm)	22.66" (575.56mm)	0.42" (10.67mm)	71st Driest	Driest since: 2009	1934
Nov 2010–Jul 2011 9-Month	23.08" (586.23mm)	22.66" (575.56mm)	0.42" (10.67mm)	57th Wettest	Wettest since: 2010	2019
Oct 2010–Jul 2011 10-Month	25.05" (636.27mm)	24.83" (630.68mm)	0.22" (5.59mm)	65th Driest	Driest since: 2009	1934
Oct 2010–Jul 2011 10-Month	25.05" (636.27mm)	24.83" (630.68mm)	0.22" (5.59mm)	63rd Wettest	Wettest since: 2010	2019
Sep 2010–Jul 2011 11-Month	27.83" (706.88mm)	27.33" (694.18mm)	0.50" (12.70mm)	70th Driest	Driest since: 2009	1934
Sep 2010–Jul 2011 11-Month	27.83" (706.88mm)	27.33" (694.18mm)	0.50" (12.70mm)	58th Wettest	Wettest since: 2010	2019
Aug 2010–Jul 2011 12-Month	30.34" (770.64mm)	29.95" (760.73mm)	0.39" (9.91mm)	63rd Driest	Driest since: 2006	1918
	30.34" (770.64mm)	29.95" (760.73mm)	0.39" (9.91mm)	65th Wettest	Wettest since: 2010	2019
	Ties: 1965
Feb 2010–Jul 2011 18-Month	47.16" (1,197.86mm)	45.74" (1,161.80mm)	1.42" (36.06mm)	83rd Driest	Driest since: 2009	1931
Feb 2010–Jul 2011 18-Month	47.16" (1,197.86mm)	45.74" (1,161.80mm)	1.42" (36.06mm)	45th Wettest	Wettest since: 2010	2019
Aug 2009–Jul 2011 24-Month	64.01" (1,625.85mm)	59.92" (1,521.97mm)	4.09" (103.88mm)	107th Driest	Driest since: 2009	1918
Aug 2009–Jul 2011 24-Month	64.01" (1,625.85mm)	59.92" (1,521.97mm)	4.09" (103.88mm)	20th Wettest	Wettest since: 2010	2020
Aug 2008–Jul 2011 36-Month	94.78" (2,407.41mm)	89.88" (2,282.95mm)	4.90" (124.46mm)	104th Driest	Driest since: 2009	1956
Aug 2008–Jul 2011 36-Month	94.78" (2,407.41mm)	89.88" (2,282.95mm)	4.90" (124.46mm)	22nd Wettest	Wettest since: 2010	2019
Aug 2007–Jul 2011 48-Month	125.18" (3,179.57mm)	119.78" (3,042.41mm)	5.40" (137.16mm)	101st Driest	Driest since: 2009	1956
Aug 2007–Jul 2011 48-Month	125.18" (3,179.57mm)	119.78" (3,042.41mm)	5.40" (137.16mm)	24th Wettest	Wettest since: 2010	2019
Aug 2006–Jul 2011 60-Month	156.03" (3,963.16mm)	149.64" (3,800.86mm)	6.39" (162.30mm)	100th Driest	Driest since: 2010	1934
Aug 2006–Jul 2011 60-Month	156.03" (3,963.16mm)	149.64" (3,800.86mm)	6.39" (162.30mm)	24th Wettest	Wettest since: 2000	2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published March 2023, retrieved on March 25, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings