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, January 1931

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
January 1931 1-Month	3.63" (92.20mm)	4.53" (115.06mm)	-0.90" (-22.86mm)	45th Driest	Driest since: 1930	1985
	3.63" (92.20mm)	4.53" (115.06mm)	-0.90" (-22.86mm)	84th Wettest	Wettest since: 1928	1953
	Ties: 1941
Dec 1930–Jan 1931 2-Month	5.30" (134.62mm)	9.17" (232.92mm)	-3.87" (-98.30mm)	8th Driest	Driest since: 1915	1977
Dec 1930–Jan 1931 2-Month	5.30" (134.62mm)	9.17" (232.92mm)	-3.87" (-98.30mm)	120th Wettest	Wettest since: 1930	1965
Nov 1930–Jan 1931 3-Month	7.87" (199.90mm)	13.53" (343.66mm)	-5.66" (-143.76mm)	6th Driest	Driest since: 1915	1977
Nov 1930–Jan 1931 3-Month	7.87" (199.90mm)	13.53" (343.66mm)	-5.66" (-143.76mm)	122nd Wettest	Wettest since: 1930	1974
Oct 1930–Jan 1931 4-Month	10.06" (255.52mm)	16.08" (408.43mm)	-6.02" (-152.91mm)	7th Driest	Driest since: 1931	1977
Oct 1930–Jan 1931 4-Month	10.06" (255.52mm)	16.08" (408.43mm)	-6.02" (-152.91mm)	121st Wettest	Wettest since: 1930	1997
Sep 1930–Jan 1931 5-Month	11.67" (296.42mm)	17.50" (444.50mm)	-5.83" (-148.08mm)	7th Driest	Driest since: 1930	1977
Sep 1930–Jan 1931 5-Month	11.67" (296.42mm)	17.50" (444.50mm)	-5.83" (-148.08mm)	121st Wettest	Wettest since: 1929	1974
Aug 1930–Jan 1931 6-Month	12.39" (314.71mm)	18.31" (465.07mm)	-5.92" (-150.36mm)	7th Driest	Driest since: 1930	1977
Aug 1930–Jan 1931 6-Month	12.39" (314.71mm)	18.31" (465.07mm)	-5.92" (-150.36mm)	121st Wettest	Wettest since: 1929	1974
Jul 1930–Jan 1931 7-Month	12.60" (320.04mm)	19.04" (483.62mm)	-6.44" (-163.58mm)	6th Driest	Driest since: 1930	1977
Jul 1930–Jan 1931 7-Month	12.60" (320.04mm)	19.04" (483.62mm)	-6.44" (-163.58mm)	122nd Wettest	Wettest since: 1929	1956
Jun 1930–Jan 1931 8-Month	13.67" (347.22mm)	20.76" (527.30mm)	-7.09" (-180.08mm)	4th Driest	Driest since: 1931	1977
Jun 1930–Jan 1931 8-Month	13.67" (347.22mm)	20.76" (527.30mm)	-7.09" (-180.08mm)	124th Wettest	Wettest since: 1930	1956
May 1930–Jan 1931 9-Month	16.00" (406.40mm)	22.91" (581.91mm)	-6.91" (-175.51mm)	7th Driest	Driest since: 1930	1977
May 1930–Jan 1931 9-Month	16.00" (406.40mm)	22.91" (581.91mm)	-6.91" (-175.51mm)	121st Wettest	Wettest since: 1928	1997
Apr 1930–Jan 1931 10-Month	18.25" (463.55mm)	25.27" (641.86mm)	-7.02" (-178.31mm)	5th Driest	Driest since: 1930	1977
Apr 1930–Jan 1931 10-Month	18.25" (463.55mm)	25.27" (641.86mm)	-7.02" (-178.31mm)	123rd Wettest	Wettest since: 1929	1997
Mar 1930–Jan 1931 11-Month	20.31" (515.87mm)	28.53" (724.66mm)	-8.22" (-208.79mm)	4th Driest	Driest since: 1931	1977
Mar 1930–Jan 1931 11-Month	20.31" (515.87mm)	28.53" (724.66mm)	-8.22" (-208.79mm)	124th Wettest	Wettest since: 1930	1997
Feb 1930–Jan 1931 12-Month	24.59" (624.59mm)	32.13" (816.10mm)	-7.54" (-191.51mm)	6th Driest	Driest since: 1930	1977
Feb 1930–Jan 1931 12-Month	24.59" (624.59mm)	32.13" (816.10mm)	-7.54" (-191.51mm)	122nd Wettest	Wettest since: 1929	1997
Aug 1929–Jan 1931 18-Month	36.19" (919.23mm)	50.47" (1,281.94mm)	-14.28" (-362.71mm)	2nd Driest	Driest since: 1930	1930
Aug 1929–Jan 1931 18-Month	36.19" (919.23mm)	50.47" (1,281.94mm)	-14.28" (-362.71mm)	125th Wettest	Wettest since: 1929	1997
Feb 1929–Jan 1931 24-Month	46.34" (1,177.04mm)	64.28" (1,632.71mm)	-17.94" (-455.67mm)	1st Driest	Driest since: 1931	1931
Feb 1929–Jan 1931 24-Month	46.34" (1,177.04mm)	64.28" (1,632.71mm)	-17.94" (-455.67mm)	126th Wettest	Wettest since: 1930	1997
Feb 1928–Jan 1931 36-Month	71.23" (1,809.24mm)	96.31" (2,446.27mm)	-25.08" (-637.03mm)	1st Driest	Driest since: 1931	1931
Feb 1928–Jan 1931 36-Month	71.23" (1,809.24mm)	96.31" (2,446.27mm)	-25.08" (-637.03mm)	125th Wettest	Wettest since: 1930	1998
Feb 1927–Jan 1931 48-Month	107.21" (2,723.13mm)	128.35" (3,260.09mm)	-21.14" (-536.96mm)	2nd Driest	Driest since: 1931	1932
Feb 1927–Jan 1931 48-Month	107.21" (2,723.13mm)	128.35" (3,260.09mm)	-21.14" (-536.96mm)	123rd Wettest	Wettest since: 1930	1999
Feb 1926–Jan 1931 60-Month	139.14" (3,534.16mm)	160.30" (4,071.62mm)	-21.16" (-537.46mm)	3rd Driest	Driest since: 1931	1933
Feb 1926–Jan 1931 60-Month	139.14" (3,534.16mm)	160.30" (4,071.62mm)	-21.16" (-537.46mm)	121st Wettest	Wettest since: 1930	2000

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