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, March 2018

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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
March 2018 1-Month	2.48" (62.99mm)	2.51" (63.75mm)	-0.03" (-0.76mm)	69th Driest	Driest since: 2015	1910
	2.48" (62.99mm)	2.51" (63.75mm)	-0.03" (-0.76mm)	60th Wettest	Wettest since: 2017	1973
	Ties: 1917, 1985, 2003
Feb–Mar 2018 2-Month	5.37" (136.40mm)	4.64" (117.86mm)	0.73" (18.54mm)	111th Driest	Driest since: 2017	1910
Feb–Mar 2018 2-Month	5.37" (136.40mm)	4.64" (117.86mm)	0.73" (18.54mm)	18th Wettest	Wettest since: 1998	1998
Jan–Mar 2018 3-Month	7.22" (183.39mm)	6.96" (176.78mm)	0.26" (6.61mm)	84th Driest	Driest since: 2016	1910
Jan–Mar 2018 3-Month	7.22" (183.39mm)	6.96" (176.78mm)	0.26" (6.61mm)	45th Wettest	Wettest since: 2017	1998
Dec 2017–Mar 2018 4-Month	8.81" (223.77mm)	9.30" (236.22mm)	-0.49" (-12.45mm)	44th Driest	Driest since: 2015	1981
	8.81" (223.77mm)	9.30" (236.22mm)	-0.49" (-12.45mm)	84th Wettest	Wettest since: 2017	1983, 1998
	Ties: 2004
Nov 2017–Mar 2018 5-Month	10.43" (264.92mm)	11.53" (292.86mm)	-1.10" (-27.94mm)	20th Driest	Driest since: 2015	1977
Nov 2017–Mar 2018 5-Month	10.43" (264.92mm)	11.53" (292.86mm)	-1.10" (-27.94mm)	108th Wettest	Wettest since: 2017	1983
Oct 2017–Mar 2018 6-Month	13.03" (330.96mm)	13.70" (347.98mm)	-0.67" (-17.02mm)	39th Driest	Driest since: 2015	1918
	13.03" (330.96mm)	13.70" (347.98mm)	-0.67" (-17.02mm)	89th Wettest	Wettest since: 2017	1983
	Ties: 1936
Sep 2017–Mar 2018 7-Month	15.30" (388.62mm)	16.19" (411.23mm)	-0.89" (-22.61mm)	37th Driest	Driest since: 2013	1918
Sep 2017–Mar 2018 7-Month	15.30" (388.62mm)	16.19" (411.23mm)	-0.89" (-22.61mm)	91st Wettest	Wettest since: 2017	2019
Aug 2017–Mar 2018 8-Month	18.72" (475.49mm)	18.82" (478.03mm)	-0.10" (-2.54mm)	62nd Driest	Driest since: 2015	1918
Aug 2017–Mar 2018 8-Month	18.72" (475.49mm)	18.82" (478.03mm)	-0.10" (-2.54mm)	66th Wettest	Wettest since: 2017	2019
Jul 2017–Mar 2018 9-Month	21.52" (546.61mm)	21.60" (548.64mm)	-0.08" (-2.03mm)	61st Driest	Driest since: 2015	1918
Jul 2017–Mar 2018 9-Month	21.52" (546.61mm)	21.60" (548.64mm)	-0.08" (-2.03mm)	67th Wettest	Wettest since: 2017	2019
Jun 2017–Mar 2018 10-Month	24.59" (624.59mm)	24.53" (623.06mm)	0.06" (1.53mm)	57th Driest	Driest since: 2013	1918
Jun 2017–Mar 2018 10-Month	24.59" (624.59mm)	24.53" (623.06mm)	0.06" (1.53mm)	71st Wettest	Wettest since: 2017	2019
May 2017–Mar 2018 11-Month	27.95" (709.93mm)	27.43" (696.72mm)	0.52" (13.21mm)	72nd Driest	Driest since: 2015	1918
May 2017–Mar 2018 11-Month	27.95" (709.93mm)	27.43" (696.72mm)	0.52" (13.21mm)	56th Wettest	Wettest since: 2017	2019
Apr 2017–Mar 2018 12-Month	31.45" (798.83mm)	29.96" (760.98mm)	1.49" (37.85mm)	95th Driest	Driest since: 2015	1918
Apr 2017–Mar 2018 12-Month	31.45" (798.83mm)	29.96" (760.98mm)	1.49" (37.85mm)	33rd Wettest	Wettest since: 2017	2016
Oct 2016–Mar 2018 18-Month	46.39" (1,178.31mm)	43.68" (1,109.47mm)	2.71" (68.84mm)	101st Driest	Driest since: 2015	1918
Oct 2016–Mar 2018 18-Month	46.39" (1,178.31mm)	43.68" (1,109.47mm)	2.71" (68.84mm)	26th Wettest	Wettest since: 2017	2020
Apr 2016–Mar 2018 24-Month	64.06" (1,627.12mm)	59.92" (1,521.97mm)	4.14" (105.15mm)	110th Driest	Driest since: 2015	1955
	64.06" (1,627.12mm)	59.92" (1,521.97mm)	4.14" (105.15mm)	17th Wettest	Wettest since: 2017	2020
	Ties: 1959
Apr 2015–Mar 2018 36-Month	99.84" (2,535.94mm)	89.87" (2,282.70mm)	9.97" (253.24mm)	123rd Driest	Driest since: 2017	1955
Apr 2015–Mar 2018 36-Month	99.84" (2,535.94mm)	89.87" (2,282.70mm)	9.97" (253.24mm)	3rd Wettest	Wettest since: 1998	2020
Apr 2014–Mar 2018 48-Month	130.40" (3,312.16mm)	119.76" (3,041.90mm)	10.64" (270.26mm)	118th Driest	Driest since: 2017	1957
Apr 2014–Mar 2018 48-Month	130.40" (3,312.16mm)	119.76" (3,041.90mm)	10.64" (270.26mm)	7th Wettest	Wettest since: 1999	2019
Apr 2013–Mar 2018 60-Month	161.34" (4,098.04mm)	149.62" (3,800.35mm)	11.72" (297.69mm)	117th Driest	Driest since: 2017	1957
Apr 2013–Mar 2018 60-Month	161.34" (4,098.04mm)	149.62" (3,800.35mm)	11.72" (297.69mm)	7th Wettest	Wettest since: 1999	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published March 2023, retrieved on March 20, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings