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.

Northwest Climate Region

Precipitation Rankings, October 1931

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
October 1931 1-Month	2.75" (69.85mm)	2.54" (64.52mm)	0.21" (5.33mm)	78th Driest	Driest since: 1930	1895
	2.75" (69.85mm)	2.54" (64.52mm)	0.21" (5.33mm)	51st Wettest	Wettest since: 1927	2016
	Ties: 2005
Sep–Oct 1931 2-Month	4.42" (112.27mm)	3.96" (100.58mm)	0.46" (11.69mm)	82nd Driest	Driest since: 1930	1987
Sep–Oct 1931 2-Month	4.42" (112.27mm)	3.96" (100.58mm)	0.46" (11.69mm)	47th Wettest	Wettest since: 1927	2016
Aug–Oct 1931 3-Month	4.57" (116.08mm)	4.76" (120.90mm)	-0.19" (-4.82mm)	61st Driest	Driest since: 1930	1987
Aug–Oct 1931 3-Month	4.57" (116.08mm)	4.76" (120.90mm)	-0.19" (-4.82mm)	68th Wettest	Wettest since: 1927	2016
Jul–Oct 1931 4-Month	4.76" (120.90mm)	5.49" (139.45mm)	-0.73" (-18.55mm)	48th Driest	Driest since: 1930	1952
	4.76" (120.90mm)	5.49" (139.45mm)	-0.73" (-18.55mm)	81st Wettest	Wettest since: 1927	2016
	Ties: 1937
Jun–Oct 1931 5-Month	7.05" (179.07mm)	7.21" (183.13mm)	-0.16" (-4.06mm)	64th Driest	Driest since: 1930	1917, 2002
Jun–Oct 1931 5-Month	7.05" (179.07mm)	7.21" (183.13mm)	-0.16" (-4.06mm)	65th Wettest	Wettest since: 1927	1947
May–Oct 1931 6-Month	7.97" (202.44mm)	9.35" (237.49mm)	-1.38" (-35.05mm)	28th Driest	Driest since: 1929	2002
	7.97" (202.44mm)	9.35" (237.49mm)	-1.38" (-35.05mm)	101st Wettest	Wettest since: 1930	1941
	Ties: 1992
Apr–Oct 1931 7-Month	9.74" (247.40mm)	11.71" (297.43mm)	-1.97" (-50.03mm)	23rd Driest	Driest since: 1929	2002
	9.74" (247.40mm)	11.71" (297.43mm)	-1.97" (-50.03mm)	106th Wettest	Wettest since: 1930	1997
	Ties: 2006
Mar–Oct 1931 8-Month	14.25" (361.95mm)	14.97" (380.24mm)	-0.72" (-18.29mm)	50th Driest	Driest since: 1930	1939
Mar–Oct 1931 8-Month	14.25" (361.95mm)	14.97" (380.24mm)	-0.72" (-18.29mm)	79th Wettest	Wettest since: 1927	1997
Feb–Oct 1931 9-Month	16.44" (417.58mm)	18.58" (471.93mm)	-2.14" (-54.35mm)	32nd Driest	Driest since: 1929	1929
Feb–Oct 1931 9-Month	16.44" (417.58mm)	18.58" (471.93mm)	-2.14" (-54.35mm)	97th Wettest	Wettest since: 1930	2017
Jan–Oct 1931 10-Month	20.07" (509.78mm)	23.10" (586.74mm)	-3.03" (-76.96mm)	32nd Driest	Driest since: 1930	1929
Jan–Oct 1931 10-Month	20.07" (509.78mm)	23.10" (586.74mm)	-3.03" (-76.96mm)	97th Wettest	Wettest since: 1927	1950
Dec 1930–Oct 1931 11-Month	21.74" (552.20mm)	27.75" (704.85mm)	-6.01" (-152.65mm)	9th Driest	Driest since: 1929	1929
Dec 1930–Oct 1931 11-Month	21.74" (552.20mm)	27.75" (704.85mm)	-6.01" (-152.65mm)	119th Wettest	Wettest since: 1930	1997
Nov 1930–Oct 1931 12-Month	24.31" (617.47mm)	32.10" (815.34mm)	-7.79" (-197.87mm)	6th Driest	Driest since: 1929	1977
Nov 1930–Oct 1931 12-Month	24.31" (617.47mm)	32.10" (815.34mm)	-7.79" (-197.87mm)	122nd Wettest	Wettest since: 1930	1997
May 1930–Oct 1931 18-Month	32.44" (823.98mm)	41.48" (1,053.59mm)	-9.04" (-229.61mm)	7th Driest	Driest since: 1930	1929
May 1930–Oct 1931 18-Month	32.44" (823.98mm)	41.48" (1,053.59mm)	-9.04" (-229.61mm)	121st Wettest	Wettest since: 1928	1997
Nov 1929–Oct 1931 24-Month	50.69" (1,287.53mm)	64.23" (1,631.44mm)	-13.54" (-343.91mm)	3rd Driest	Driest since: 1930	1930
Nov 1929–Oct 1931 24-Month	50.69" (1,287.53mm)	64.23" (1,631.44mm)	-13.54" (-343.91mm)	124th Wettest	Wettest since: 1929	1997
Nov 1928–Oct 1931 36-Month	72.76" (1,848.10mm)	96.31" (2,446.27mm)	-23.55" (-598.17mm)	1st Driest	Driest since: 1931	1931
Nov 1928–Oct 1931 36-Month	72.76" (1,848.10mm)	96.31" (2,446.27mm)	-23.55" (-598.17mm)	125th Wettest	Wettest since: 1930	1997
Nov 1927–Oct 1931 48-Month	102.06" (2,592.32mm)	128.38" (3,260.85mm)	-26.32" (-668.53mm)	1st Driest	Driest since: 1931	1931
Nov 1927–Oct 1931 48-Month	102.06" (2,592.32mm)	128.38" (3,260.85mm)	-26.32" (-668.53mm)	124th Wettest	Wettest since: 1930	1999
Nov 1926–Oct 1931 60-Month	139.10" (3,533.14mm)	160.37" (4,073.40mm)	-21.27" (-540.26mm)	3rd Driest	Driest since: 1931	1932
Nov 1926–Oct 1931 60-Month	139.10" (3,533.14mm)	160.37" (4,073.40mm)	-21.27" (-540.26mm)	121st Wettest	Wettest since: 1930	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on January 27, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings