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 1903

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
May 1903 1-Month	0.50" (12.70mm)	0.92" (23.37mm)	-0.42" (-10.67mm)	30th Driest	Driest since: 1897	1924
	0.50" (12.70mm)	0.92" (23.37mm)	-0.42" (-10.67mm)	99th Wettest	Wettest since: 1902	1998
	Ties: 1919, 1928, 1940, 1999
Apr–May 1903 2-Month	1.36" (34.54mm)	2.26" (57.40mm)	-0.90" (-22.86mm)	22nd Driest	Driest since: 1897	1909
Apr–May 1903 2-Month	1.36" (34.54mm)	2.26" (57.40mm)	-0.90" (-22.86mm)	107th Wettest	Wettest since: 1902	1896
Mar–May 1903 3-Month	4.99" (126.75mm)	4.59" (116.59mm)	0.40" (10.16mm)	82nd Driest	Driest since: 1902	2008
Mar–May 1903 3-Month	4.99" (126.75mm)	4.59" (116.59mm)	0.40" (10.16mm)	47th Wettest	Wettest since: 1899	1995
Feb–May 1903 4-Month	6.27" (159.26mm)	7.31" (185.67mm)	-1.04" (-26.41mm)	51st Driest	Driest since: 1900	1997
	6.27" (159.26mm)	7.31" (185.67mm)	-1.04" (-26.41mm)	78th Wettest	Wettest since: 1902	1998
	Ties: 1895, 1989
Jan–May 1903 5-Month	9.77" (248.16mm)	10.29" (261.37mm)	-0.52" (-13.21mm)	68th Driest	Driest since: 1900	2022
Jan–May 1903 5-Month	9.77" (248.16mm)	10.29" (261.37mm)	-0.52" (-13.21mm)	61st Wettest	Wettest since: 1902	1998
Dec 1902–May 1903 6-Month	11.94" (303.28mm)	12.84" (326.14mm)	-0.90" (-22.86mm)	66th Driest	Driest since: 1900	1924
	11.94" (303.28mm)	12.84" (326.14mm)	-0.90" (-22.86mm)	62nd Wettest	Wettest since: 1902	1995
	Ties: 1908
Nov 1902–May 1903 7-Month	14.79" (375.67mm)	14.71" (373.63mm)	0.08" (2.04mm)	77th Driest	Driest since: 1902	1977
	14.79" (375.67mm)	14.71" (373.63mm)	0.08" (2.04mm)	51st Wettest	Wettest since: 1901	1995
	Ties: 1905
Oct 1902–May 1903 8-Month	15.92" (404.37mm)	15.74" (399.80mm)	0.18" (4.57mm)	72nd Driest	Driest since: 1902	1977
Oct 1902–May 1903 8-Month	15.92" (404.37mm)	15.74" (399.80mm)	0.18" (4.57mm)	56th Wettest	Wettest since: 1901	1983
Sep 1902–May 1903 9-Month	16.09" (408.69mm)	16.23" (412.24mm)	-0.14" (-3.55mm)	70th Driest	Driest since: 1900	2021
Sep 1902–May 1903 9-Month	16.09" (408.69mm)	16.23" (412.24mm)	-0.14" (-3.55mm)	58th Wettest	Wettest since: 1902	1983
Aug 1902–May 1903 10-Month	16.31" (414.27mm)	16.62" (422.15mm)	-0.31" (-7.88mm)	68th Driest	Driest since: 1900	2021
Aug 1902–May 1903 10-Month	16.31" (414.27mm)	16.62" (422.15mm)	-0.31" (-7.88mm)	60th Wettest	Wettest since: 1902	1983
Jul 1902–May 1903 11-Month	16.72" (424.69mm)	16.95" (430.53mm)	-0.23" (-5.84mm)	68th Driest	Driest since: 1900	2021
Jul 1902–May 1903 11-Month	16.72" (424.69mm)	16.95" (430.53mm)	-0.23" (-5.84mm)	60th Wettest	Wettest since: 1902	1983
Jun 1902–May 1903 12-Month	16.79" (426.47mm)	17.44" (442.98mm)	-0.65" (-16.51mm)	64th Driest	Driest since: 1899	2021
Jun 1902–May 1903 12-Month	16.79" (426.47mm)	17.44" (442.98mm)	-0.65" (-16.51mm)	64th Wettest	Wettest since: 1902	1983
Dec 1901–May 1903 18-Month	29.22" (742.19mm)	30.25" (768.35mm)	-1.03" (-26.16mm)	63rd Driest	Driest since: 1900	1977
Dec 1901–May 1903 18-Month	29.22" (742.19mm)	30.25" (768.35mm)	-1.03" (-26.16mm)	64th Wettest	Wettest since: 1902	1983
Jun 1901–May 1903 24-Month	34.13" (866.90mm)	34.89" (886.21mm)	-0.76" (-19.31mm)	60th Driest	Driest since: 1900	2022
Jun 1901–May 1903 24-Month	34.13" (866.90mm)	34.89" (886.21mm)	-0.76" (-19.31mm)	67th Wettest	Wettest since: 1902	1983
Jun 1900–May 1903 36-Month	53.18" (1,350.77mm)	52.30" (1,328.42mm)	0.88" (22.35mm)	78th Driest	Driest since: 1901	2022
Jun 1900–May 1903 36-Month	53.18" (1,350.77mm)	52.30" (1,328.42mm)	0.88" (22.35mm)	48th Wettest	Wettest since: 1902	1984
Jun 1899–May 1903 48-Month	70.18" (1,782.57mm)	69.56" (1,766.82mm)	0.62" (15.75mm)	76th Driest	Driest since: 1902	2015
Jun 1899–May 1903 48-Month	70.18" (1,782.57mm)	69.56" (1,766.82mm)	0.62" (15.75mm)	49th Wettest	Wettest to Date	1998
Jun 1898–May 1903 60-Month	84.48" (2,145.79mm)	86.83" (2,205.48mm)	-2.35" (-59.69mm)	63rd Driest	Driest since: 1902	1933
Jun 1898–May 1903 60-Month	84.48" (2,145.79mm)	86.83" (2,205.48mm)	-2.35" (-59.69mm)	61st Wettest	Wettest to Date	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 1, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings