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 2007

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
May 2007 1-Month	2.75" (69.85mm)	2.91" (73.91mm)	-0.16" (-4.06mm)	47th Driest	Driest since: 2006	1934
May 2007 1-Month	2.75" (69.85mm)	2.91" (73.91mm)	-0.16" (-4.06mm)	82nd Wettest	Wettest since: 2005	2019
Apr–May 2007 2-Month	5.24" (133.10mm)	5.43" (137.92mm)	-0.19" (-4.82mm)	52nd Driest	Driest since: 2006	1934
	5.24" (133.10mm)	5.43" (137.92mm)	-0.19" (-4.82mm)	77th Wettest	Wettest since: 2005	1957
	Ties: 1906
Mar–May 2007 3-Month	7.55" (191.77mm)	7.94" (201.68mm)	-0.39" (-9.91mm)	45th Driest	Driest since: 2006	1925
	7.55" (191.77mm)	7.94" (201.68mm)	-0.39" (-9.91mm)	84th Wettest	Wettest since: 2005	1957, 1991
	Ties: 1913, 1967, 2021
Feb–May 2007 4-Month	9.31" (236.47mm)	10.07" (255.78mm)	-0.76" (-19.31mm)	28th Driest	Driest since: 2006	1925
Feb–May 2007 4-Month	9.31" (236.47mm)	10.07" (255.78mm)	-0.76" (-19.31mm)	101st Wettest	Wettest since: 2005	2019
Jan–May 2007 5-Month	11.53" (292.86mm)	12.39" (314.71mm)	-0.86" (-21.85mm)	30th Driest	Driest since: 2006	1934
Jan–May 2007 5-Month	11.53" (292.86mm)	12.39" (314.71mm)	-0.86" (-21.85mm)	99th Wettest	Wettest since: 2005	2019
Dec 2006–May 2007 6-Month	14.10" (358.14mm)	14.73" (374.14mm)	-0.63" (-16.00mm)	47th Driest	Driest since: 2006	1931
Dec 2006–May 2007 6-Month	14.10" (358.14mm)	14.73" (374.14mm)	-0.63" (-16.00mm)	81st Wettest	Wettest since: 2005	2019
Nov 2006–May 2007 7-Month	16.56" (420.62mm)	16.96" (430.78mm)	-0.40" (-10.16mm)	54th Driest	Driest since: 2006	1934
	16.56" (420.62mm)	16.96" (430.78mm)	-0.40" (-10.16mm)	74th Wettest	Wettest since: 2005	1983
	Ties: 2013
Oct 2006–May 2007 8-Month	19.46" (494.28mm)	19.13" (485.90mm)	0.33" (8.38mm)	73rd Driest	Driest since: 2006	1934
	19.46" (494.28mm)	19.13" (485.90mm)	0.33" (8.38mm)	55th Wettest	Wettest since: 2005	2019
	Ties: 1990
Sep 2006–May 2007 9-Month	22.26" (565.40mm)	21.62" (549.15mm)	0.64" (16.25mm)	82nd Driest	Driest since: 2006	1934
	22.26" (565.40mm)	21.62" (549.15mm)	0.64" (16.25mm)	46th Wettest	Wettest since: 2005	2019
	Ties: 1972
Aug 2006–May 2007 10-Month	25.06" (636.52mm)	24.25" (615.95mm)	0.81" (20.57mm)	84th Driest	Driest since: 2006	1918
Aug 2006–May 2007 10-Month	25.06" (636.52mm)	24.25" (615.95mm)	0.81" (20.57mm)	44th Wettest	Wettest since: 2005	2019
Jul 2006–May 2007 11-Month	27.52" (699.01mm)	27.03" (686.56mm)	0.49" (12.45mm)	74th Driest	Driest since: 2006	1931
Jul 2006–May 2007 11-Month	27.52" (699.01mm)	27.03" (686.56mm)	0.49" (12.45mm)	54th Wettest	Wettest since: 2005	2019
Jun 2006–May 2007 12-Month	30.08" (764.03mm)	29.95" (760.73mm)	0.13" (3.30mm)	62nd Driest	Driest since: 2006	1934
	30.08" (764.03mm)	29.95" (760.73mm)	0.13" (3.30mm)	66th Wettest	Wettest since: 2005	2019
	Ties: 1968
Dec 2005–May 2007 18-Month	43.64" (1,108.46mm)	44.70" (1,135.38mm)	-1.06" (-26.92mm)	39th Driest	Driest since: 2006	1931
Dec 2005–May 2007 18-Month	43.64" (1,108.46mm)	44.70" (1,135.38mm)	-1.06" (-26.92mm)	88th Wettest	Wettest since: 2005	2019
Jun 2005–May 2007 24-Month	59.00" (1,498.60mm)	59.92" (1,521.97mm)	-0.92" (-23.37mm)	47th Driest	Driest since: 2003	1931
Jun 2005–May 2007 24-Month	59.00" (1,498.60mm)	59.92" (1,521.97mm)	-0.92" (-23.37mm)	80th Wettest	Wettest since: 2006	2020
Jun 2004–May 2007 36-Month	92.41" (2,347.21mm)	89.88" (2,282.95mm)	2.53" (64.26mm)	87th Driest	Driest since: 2004	1955
Jun 2004–May 2007 36-Month	92.41" (2,347.21mm)	89.88" (2,282.95mm)	2.53" (64.26mm)	39th Wettest	Wettest since: 2006	2019
Jun 2003–May 2007 48-Month	122.91" (3,121.91mm)	119.78" (3,042.41mm)	3.13" (79.50mm)	89th Driest	Driest since: 2005	1956
Jun 2003–May 2007 48-Month	122.91" (3,121.91mm)	119.78" (3,042.41mm)	3.13" (79.50mm)	36th Wettest	Wettest since: 2006	2019
Jun 2002–May 2007 60-Month	153.42" (3,896.87mm)	149.64" (3,800.86mm)	3.78" (96.01mm)	87th Driest	Driest since: 2006	1957
Jun 2002–May 2007 60-Month	153.42" (3,896.87mm)	149.64" (3,800.86mm)	3.78" (96.01mm)	37th Wettest	Wettest since: 2001	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on February 8, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings