Regional Rankings

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Please note, Palmer Indices are not available for NWS Regions. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

West Climate Region

Precipitation Rankings, May 2004

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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 2004 1-Month	0.51" (12.95mm)	0.92" (23.37mm)	-0.41" (-10.42mm)	35th Driest	Driest since: 2002	1924
	0.51" (12.95mm)	0.92" (23.37mm)	-0.41" (-10.42mm)	94th Wettest	Wettest since: 2003	1998
	Ties: 1965, 2002
Apr–May 2004 2-Month	1.34" (34.04mm)	2.26" (57.40mm)	-0.92" (-23.36mm)	21st Driest	Driest since: 1997	1909
Apr–May 2004 2-Month	1.34" (34.04mm)	2.26" (57.40mm)	-0.92" (-23.36mm)	108th Wettest	Wettest since: 2003	1896
Mar–May 2004 3-Month	2.12" (53.85mm)	4.59" (116.59mm)	-2.47" (-62.74mm)	8th Driest	Driest since: 1997	2008
Mar–May 2004 3-Month	2.12" (53.85mm)	4.59" (116.59mm)	-2.47" (-62.74mm)	121st Wettest	Wettest since: 2003	1995
Feb–May 2004 4-Month	6.25" (158.75mm)	7.31" (185.67mm)	-1.06" (-26.92mm)	50th Driest	Driest since: 2002	1997
Feb–May 2004 4-Month	6.25" (158.75mm)	7.31" (185.67mm)	-1.06" (-26.92mm)	79th Wettest	Wettest since: 2003	1998
Jan–May 2004 5-Month	7.80" (198.12mm)	10.29" (261.37mm)	-2.49" (-63.25mm)	35th Driest	Driest since: 2002	2022
Jan–May 2004 5-Month	7.80" (198.12mm)	10.29" (261.37mm)	-2.49" (-63.25mm)	94th Wettest	Wettest since: 2003	1998
Dec 2003–May 2004 6-Month	11.90" (302.26mm)	12.84" (326.14mm)	-0.94" (-23.88mm)	64th Driest	Driest since: 2002	1924
Dec 2003–May 2004 6-Month	11.90" (302.26mm)	12.84" (326.14mm)	-0.94" (-23.88mm)	64th Wettest	Wettest since: 2003	1995
Nov 2003–May 2004 7-Month	13.69" (347.73mm)	14.71" (373.63mm)	-1.02" (-25.90mm)	61st Driest	Driest since: 2002	1977
Nov 2003–May 2004 7-Month	13.69" (347.73mm)	14.71" (373.63mm)	-1.02" (-25.90mm)	67th Wettest	Wettest since: 2003	1995
Oct 2003–May 2004 8-Month	13.79" (350.27mm)	15.74" (399.80mm)	-1.95" (-49.53mm)	53rd Driest	Driest since: 2002	1977
Oct 2003–May 2004 8-Month	13.79" (350.27mm)	15.74" (399.80mm)	-1.95" (-49.53mm)	75th Wettest	Wettest since: 2003	1983
Sep 2003–May 2004 9-Month	14.02" (356.11mm)	16.23" (412.24mm)	-2.21" (-56.13mm)	52nd Driest	Driest since: 2002	2021
Sep 2003–May 2004 9-Month	14.02" (356.11mm)	16.23" (412.24mm)	-2.21" (-56.13mm)	76th Wettest	Wettest since: 2003	1983
Aug 2003–May 2004 10-Month	14.83" (376.68mm)	16.62" (422.15mm)	-1.79" (-45.47mm)	57th Driest	Driest since: 2002	2021
Aug 2003–May 2004 10-Month	14.83" (376.68mm)	16.62" (422.15mm)	-1.79" (-45.47mm)	71st Wettest	Wettest since: 2003	1983
Jul 2003–May 2004 11-Month	15.17" (385.32mm)	16.95" (430.53mm)	-1.78" (-45.21mm)	57th Driest	Driest since: 2002	2021
Jul 2003–May 2004 11-Month	15.17" (385.32mm)	16.95" (430.53mm)	-1.78" (-45.21mm)	71st Wettest	Wettest since: 2003	1983
Jun 2003–May 2004 12-Month	15.23" (386.84mm)	17.44" (442.98mm)	-2.21" (-56.14mm)	51st Driest	Driest since: 2002	2021
Jun 2003–May 2004 12-Month	15.23" (386.84mm)	17.44" (442.98mm)	-2.21" (-56.14mm)	77th Wettest	Wettest since: 2003	1983
Dec 2002–May 2004 18-Month	29.69" (754.13mm)	30.25" (768.35mm)	-0.56" (-14.22mm)	67th Driest	Driest since: 2003	1977
Dec 2002–May 2004 18-Month	29.69" (754.13mm)	30.25" (768.35mm)	-0.56" (-14.22mm)	60th Wettest	Wettest since: 1999	1983
Jun 2002–May 2004 24-Month	32.72" (831.09mm)	34.89" (886.21mm)	-2.17" (-55.12mm)	50th Driest	Driest since: 2003	2022
Jun 2002–May 2004 24-Month	32.72" (831.09mm)	34.89" (886.21mm)	-2.17" (-55.12mm)	77th Wettest	Wettest since: 2000	1983
Jun 2001–May 2004 36-Month	46.36" (1,177.54mm)	52.30" (1,328.42mm)	-5.94" (-150.88mm)	36th Driest	Driest since: 2003	2022
Jun 2001–May 2004 36-Month	46.36" (1,177.54mm)	52.30" (1,328.42mm)	-5.94" (-150.88mm)	90th Wettest	Wettest since: 2001	1984
Jun 2000–May 2004 48-Month	59.78" (1,518.41mm)	69.56" (1,766.82mm)	-9.78" (-248.41mm)	19th Driest	Driest since: 1992	2015
Jun 2000–May 2004 48-Month	59.78" (1,518.41mm)	69.56" (1,766.82mm)	-9.78" (-248.41mm)	106th Wettest	Wettest since: 2003	1998
Jun 1999–May 2004 60-Month	76.09" (1,932.69mm)	86.83" (2,205.48mm)	-10.74" (-272.79mm)	15th Driest	Driest since: 1992	1933
Jun 1999–May 2004 60-Month	76.09" (1,932.69mm)	86.83" (2,205.48mm)	-10.74" (-272.79mm)	109th Wettest	Wettest since: 2003	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 6, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings