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, May 1998

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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
May 1998 1-Month	2.62" (66.55mm)	2.91" (73.91mm)	-0.29" (-7.36mm)	34th Driest	Driest since: 1994	1934
May 1998 1-Month	2.62" (66.55mm)	2.91" (73.91mm)	-0.29" (-7.36mm)	95th Wettest	Wettest since: 1997	2019
Apr–May 1998 2-Month	5.19" (131.83mm)	5.43" (137.92mm)	-0.24" (-6.09mm)	45th Driest	Driest since: 1992	1934
	5.19" (131.83mm)	5.43" (137.92mm)	-0.24" (-6.09mm)	84th Wettest	Wettest since: 1997	1957
	Ties: 1901, 1986
Mar–May 1998 3-Month	8.42" (213.87mm)	7.94" (201.68mm)	0.48" (12.19mm)	93rd Driest	Driest since: 1997	1925
Mar–May 1998 3-Month	8.42" (213.87mm)	7.94" (201.68mm)	0.48" (12.19mm)	36th Wettest	Wettest since: 1995	1957, 1991
Feb–May 1998 4-Month	11.74" (298.20mm)	10.07" (255.78mm)	1.67" (42.42mm)	117th Driest	Driest since: 1997	1925
	11.74" (298.20mm)	10.07" (255.78mm)	1.67" (42.42mm)	12th Wettest	Wettest since: 1991	2019
	Ties: 2011
Jan–May 1998 5-Month	15.10" (383.54mm)	12.39" (314.71mm)	2.71" (68.83mm)	126th Driest	Driest since: 1997	1934
Jan–May 1998 5-Month	15.10" (383.54mm)	12.39" (314.71mm)	2.71" (68.83mm)	3rd Wettest	Wettest since: 1983	2019
Dec 1997–May 1998 6-Month	17.41" (442.21mm)	14.73" (374.14mm)	2.68" (68.07mm)	122nd Driest	Driest since: 1997	1931
Dec 1997–May 1998 6-Month	17.41" (442.21mm)	14.73" (374.14mm)	2.68" (68.07mm)	6th Wettest	Wettest since: 1983	2019
Nov 1997–May 1998 7-Month	19.70" (500.38mm)	16.96" (430.78mm)	2.74" (69.60mm)	120th Driest	Driest since: 1997	1934
	19.70" (500.38mm)	16.96" (430.78mm)	2.74" (69.60mm)	8th Wettest	Wettest since: 1997	1983
	Ties: 1997
Oct 1997–May 1998 8-Month	22.22" (564.39mm)	19.13" (485.90mm)	3.09" (78.49mm)	121st Driest	Driest since: 1997	1934
Oct 1997–May 1998 8-Month	22.22" (564.39mm)	19.13" (485.90mm)	3.09" (78.49mm)	7th Wettest	Wettest since: 1995	2019
Sep 1997–May 1998 9-Month	24.76" (628.90mm)	21.62" (549.15mm)	3.14" (79.75mm)	120th Driest	Driest since: 1996	1934
Sep 1997–May 1998 9-Month	24.76" (628.90mm)	21.62" (549.15mm)	3.14" (79.75mm)	8th Wettest	Wettest since: 1997	2019
Aug 1997–May 1998 10-Month	27.44" (696.98mm)	24.25" (615.95mm)	3.19" (81.03mm)	119th Driest	Driest since: 1996	1918
Aug 1997–May 1998 10-Month	27.44" (696.98mm)	24.25" (615.95mm)	3.19" (81.03mm)	9th Wettest	Wettest since: 1997	2019
Jul 1997–May 1998 11-Month	30.15" (765.81mm)	27.03" (686.56mm)	3.12" (79.25mm)	116th Driest	Driest since: 1996	1931
Jul 1997–May 1998 11-Month	30.15" (765.81mm)	27.03" (686.56mm)	3.12" (79.25mm)	12th Wettest	Wettest since: 1997	2019
Jun 1997–May 1998 12-Month	33.55" (852.17mm)	29.95" (760.73mm)	3.60" (91.44mm)	121st Driest	Driest since: 1996	1934
Jun 1997–May 1998 12-Month	33.55" (852.17mm)	29.95" (760.73mm)	3.60" (91.44mm)	7th Wettest	Wettest since: 1997	2019
Dec 1996–May 1998 18-Month	50.25" (1,276.35mm)	44.70" (1,135.38mm)	5.55" (140.97mm)	120th Driest	Driest since: 1997	1931
Dec 1996–May 1998 18-Month	50.25" (1,276.35mm)	44.70" (1,135.38mm)	5.55" (140.97mm)	7th Wettest	Wettest since: 1984	2019
Jun 1996–May 1998 24-Month	67.83" (1,722.88mm)	59.92" (1,521.97mm)	7.91" (200.91mm)	122nd Driest	Driest since: 1997	1931
Jun 1996–May 1998 24-Month	67.83" (1,722.88mm)	59.92" (1,521.97mm)	7.91" (200.91mm)	5th Wettest	Wettest since: 1983	2020
Jun 1995–May 1998 36-Month	98.65" (2,505.71mm)	89.88" (2,282.95mm)	8.77" (222.76mm)	117th Driest	Driest since: 1997	1955
Jun 1995–May 1998 36-Month	98.65" (2,505.71mm)	89.88" (2,282.95mm)	8.77" (222.76mm)	9th Wettest	Wettest since: 1984	2019
Jun 1994–May 1998 48-Month	131.97" (3,352.04mm)	119.78" (3,042.41mm)	12.19" (309.63mm)	122nd Driest	Driest since: 1997	1956
Jun 1994–May 1998 48-Month	131.97" (3,352.04mm)	119.78" (3,042.41mm)	12.19" (309.63mm)	3rd Wettest	Wettest to Date	2019
Jun 1993–May 1998 60-Month	162.50" (4,127.50mm)	149.64" (3,800.86mm)	12.86" (326.64mm)	119th Driest	Driest since: 1996	1957
Jun 1993–May 1998 60-Month	162.50" (4,127.50mm)	149.64" (3,800.86mm)	12.86" (326.64mm)	5th Wettest	Wettest since: 1997	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on January 28, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings