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, December 1991

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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
December 1991 1-Month	2.77" (70.36mm)	2.35" (59.69mm)	0.42" (10.67mm)	97th Driest	Driest since: 1990	1930
December 1991 1-Month	2.77" (70.36mm)	2.35" (59.69mm)	0.42" (10.67mm)	32nd Wettest	Wettest since: 1987	2015
Nov–Dec 1991 2-Month	5.26" (133.60mm)	4.58" (116.33mm)	0.68" (17.27mm)	102nd Driest	Driest since: 1990	1976
Nov–Dec 1991 2-Month	5.26" (133.60mm)	4.58" (116.33mm)	0.68" (17.27mm)	27th Wettest	Wettest since: 1987	2015
Oct–Dec 1991 3-Month	7.36" (186.94mm)	6.74" (171.20mm)	0.62" (15.74mm)	88th Driest	Driest since: 1989	1917
Oct–Dec 1991 3-Month	7.36" (186.94mm)	6.74" (171.20mm)	0.62" (15.74mm)	41st Wettest	Wettest since: 1990	2015
Sep–Dec 1991 4-Month	9.89" (251.21mm)	9.23" (234.44mm)	0.66" (16.77mm)	89th Driest	Driest since: 1990	1939
Sep–Dec 1991 4-Month	9.89" (251.21mm)	9.23" (234.44mm)	0.66" (16.77mm)	40th Wettest	Wettest since: 1986	2018
Aug–Dec 1991 5-Month	12.49" (317.25mm)	11.85" (300.99mm)	0.64" (16.26mm)	83rd Driest	Driest since: 1990	1917
	12.49" (317.25mm)	11.85" (300.99mm)	0.64" (16.26mm)	46th Wettest	Wettest since: 1986	2018
	Ties: 1940
Jul–Dec 1991 6-Month	15.19" (385.83mm)	14.62" (371.35mm)	0.57" (14.48mm)	79th Driest	Driest since: 1990	1917
Jul–Dec 1991 6-Month	15.19" (385.83mm)	14.62" (371.35mm)	0.57" (14.48mm)	50th Wettest	Wettest since: 1986	2018
Jun–Dec 1991 7-Month	18.03" (457.96mm)	17.55" (445.77mm)	0.48" (12.19mm)	71st Driest	Driest since: 1990	1917
Jun–Dec 1991 7-Month	18.03" (457.96mm)	17.55" (445.77mm)	0.48" (12.19mm)	58th Wettest	Wettest since: 1986	2018
May–Dec 1991 8-Month	21.75" (552.45mm)	20.46" (519.68mm)	1.29" (32.77mm)	92nd Driest	Driest since: 1990	1917
May–Dec 1991 8-Month	21.75" (552.45mm)	20.46" (519.68mm)	1.29" (32.77mm)	37th Wettest	Wettest since: 1986	2015
Apr–Dec 1991 9-Month	25.10" (637.54mm)	22.98" (583.69mm)	2.12" (53.85mm)	109th Driest	Driest since: 1990	1956
Apr–Dec 1991 9-Month	25.10" (637.54mm)	22.98" (583.69mm)	2.12" (53.85mm)	20th Wettest	Wettest since: 1986	2015
Mar–Dec 1991 10-Month	28.43" (722.12mm)	25.49" (647.45mm)	2.94" (74.67mm)	115th Driest	Driest since: 1990	1956
Mar–Dec 1991 10-Month	28.43" (722.12mm)	25.49" (647.45mm)	2.94" (74.67mm)	14th Wettest	Wettest since: 1983	2015
Feb–Dec 1991 11-Month	30.07" (763.78mm)	27.62" (701.55mm)	2.45" (62.23mm)	111th Driest	Driest since: 1990	1910
Feb–Dec 1991 11-Month	30.07" (763.78mm)	27.62" (701.55mm)	2.45" (62.23mm)	18th Wettest	Wettest since: 1983	2018
Jan–Dec 1991 12-Month	32.44" (823.98mm)	29.94" (760.48mm)	2.50" (63.50mm)	109th Driest	Driest since: 1990	1910
Jan–Dec 1991 12-Month	32.44" (823.98mm)	29.94" (760.48mm)	2.50" (63.50mm)	20th Wettest	Wettest since: 1983	1973
Jul 1990–Dec 1991 18-Month	47.61" (1,209.29mm)	44.58" (1,132.33mm)	3.03" (76.96mm)	101st Driest	Driest since: 1990	1954
Jul 1990–Dec 1991 18-Month	47.61" (1,209.29mm)	44.58" (1,132.33mm)	3.03" (76.96mm)	27th Wettest	Wettest since: 1986	2019
Jan 1990–Dec 1991 24-Month	64.61" (1,641.09mm)	59.90" (1,521.46mm)	4.71" (119.63mm)	114th Driest	Driest since: 1990	1931
Jan 1990–Dec 1991 24-Month	64.61" (1,641.09mm)	59.90" (1,521.46mm)	4.71" (119.63mm)	14th Wettest	Wettest since: 1984	2019
Jan 1989–Dec 1991 36-Month	93.66" (2,378.96mm)	89.86" (2,282.44mm)	3.80" (96.52mm)	98th Driest	Driest since: 1990	1956
Jan 1989–Dec 1991 36-Month	93.66" (2,378.96mm)	89.86" (2,282.44mm)	3.80" (96.52mm)	29th Wettest	Wettest since: 1985	2019
Jan 1988–Dec 1991 48-Month	119.56" (3,036.82mm)	119.78" (3,042.41mm)	-0.22" (-5.59mm)	55th Driest	Driest since: 1990	1956
Jan 1988–Dec 1991 48-Month	119.56" (3,036.82mm)	119.78" (3,042.41mm)	-0.22" (-5.59mm)	71st Wettest	Wettest since: 1987	2019
Jan 1987–Dec 1991 60-Month	148.57" (3,773.68mm)	149.68" (3,801.87mm)	-1.11" (-28.19mm)	54th Driest	Driest since: 1990	1956
Jan 1987–Dec 1991 60-Month	148.57" (3,773.68mm)	149.68" (3,801.87mm)	-1.11" (-28.19mm)	71st Wettest	Wettest since: 1987	2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published May 2023, retrieved on June 3, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings