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, December 1956

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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
December 1956 1-Month	4.18" (106.17mm)	4.63" (117.60mm)	-0.45" (-11.43mm)	55th Driest	Driest since: 1954	1976
December 1956 1-Month	4.18" (106.17mm)	4.63" (117.60mm)	-0.45" (-11.43mm)	74th Wettest	Wettest since: 1955	1964
Nov–Dec 1956 2-Month	5.55" (140.97mm)	8.97" (227.84mm)	-3.42" (-86.87mm)	12th Driest	Driest since: 1943	1976
Nov–Dec 1956 2-Month	5.55" (140.97mm)	8.97" (227.84mm)	-3.42" (-86.87mm)	117th Wettest	Wettest since: 1955	1996
Oct–Dec 1956 3-Month	10.59" (268.99mm)	11.51" (292.35mm)	-0.92" (-23.36mm)	49th Driest	Driest since: 1954	1976
	10.59" (268.99mm)	11.51" (292.35mm)	-0.92" (-23.36mm)	80th Wettest	Wettest since: 1955	1996
	Ties: 1904
Sep–Dec 1956 4-Month	11.57" (293.88mm)	12.93" (328.42mm)	-1.36" (-34.54mm)	43rd Driest	Driest since: 1954	1976
	11.57" (293.88mm)	12.93" (328.42mm)	-1.36" (-34.54mm)	86th Wettest	Wettest since: 1955	1996
	Ties: 2020
Aug–Dec 1956 5-Month	12.55" (318.77mm)	13.73" (348.74mm)	-1.18" (-29.97mm)	50th Driest	Driest since: 1954	1936
Aug–Dec 1956 5-Month	12.55" (318.77mm)	13.73" (348.74mm)	-1.18" (-29.97mm)	79th Wettest	Wettest since: 1955	1996
Jul–Dec 1956 6-Month	13.21" (335.53mm)	14.46" (367.28mm)	-1.25" (-31.75mm)	49th Driest	Driest since: 1954	1936
Jul–Dec 1956 6-Month	13.21" (335.53mm)	14.46" (367.28mm)	-1.25" (-31.75mm)	80th Wettest	Wettest since: 1955	1996
Jun–Dec 1956 7-Month	15.13" (384.30mm)	16.18" (410.97mm)	-1.05" (-26.67mm)	54th Driest	Driest since: 1954	1976
Jun–Dec 1956 7-Month	15.13" (384.30mm)	16.18" (410.97mm)	-1.05" (-26.67mm)	75th Wettest	Wettest since: 1955	1996
May–Dec 1956 8-Month	17.65" (448.31mm)	18.32" (465.33mm)	-0.67" (-17.02mm)	62nd Driest	Driest since: 1954	1935
May–Dec 1956 8-Month	17.65" (448.31mm)	18.32" (465.33mm)	-0.67" (-17.02mm)	67th Wettest	Wettest since: 1955	1996
Apr–Dec 1956 9-Month	18.65" (473.71mm)	20.67" (525.02mm)	-2.02" (-51.31mm)	40th Driest	Driest since: 1954	1976
Apr–Dec 1956 9-Month	18.65" (473.71mm)	20.67" (525.02mm)	-2.02" (-51.31mm)	89th Wettest	Wettest since: 1955	1996
Mar–Dec 1956 10-Month	22.12" (561.85mm)	23.93" (607.82mm)	-1.81" (-45.97mm)	44th Driest	Driest since: 1954	1976
Mar–Dec 1956 10-Month	22.12" (561.85mm)	23.93" (607.82mm)	-1.81" (-45.97mm)	85th Wettest	Wettest since: 1955	1996
Feb–Dec 1956 11-Month	25.75" (654.05mm)	27.54" (699.52mm)	-1.79" (-45.47mm)	51st Driest	Driest since: 1954	1935
Feb–Dec 1956 11-Month	25.75" (654.05mm)	27.54" (699.52mm)	-1.79" (-45.47mm)	78th Wettest	Wettest since: 1955	1996
Jan–Dec 1956 12-Month	32.67" (829.82mm)	32.07" (814.58mm)	0.60" (15.24mm)	75th Driest	Driest since: 1954	1929
Jan–Dec 1956 12-Month	32.67" (829.82mm)	32.07" (814.58mm)	0.60" (15.24mm)	54th Wettest	Wettest since: 1955	1996
Jul 1955–Dec 1956 18-Month	54.15" (1,375.41mm)	46.58" (1,183.13mm)	7.57" (192.28mm)	115th Driest	Driest since: 1955	1929
Jul 1955–Dec 1956 18-Month	54.15" (1,375.41mm)	46.58" (1,183.13mm)	7.57" (192.28mm)	13th Wettest	Wettest since: 1948	1996
Jan 1955–Dec 1956 24-Month	69.23" (1,758.44mm)	64.19" (1,630.43mm)	5.04" (128.01mm)	107th Driest	Driest since: 1955	1930
Jan 1955–Dec 1956 24-Month	69.23" (1,758.44mm)	64.19" (1,630.43mm)	5.04" (128.01mm)	21st Wettest	Wettest since: 1951	1996
Jan 1954–Dec 1956 36-Month	100.42" (2,550.67mm)	96.33" (2,446.78mm)	4.09" (103.89mm)	97th Driest	Driest since: 1954	1930
Jan 1954–Dec 1956 36-Month	100.42" (2,550.67mm)	96.33" (2,446.78mm)	4.09" (103.89mm)	30th Wettest	Wettest since: 1955	1997
Jan 1953–Dec 1956 48-Month	138.37" (3,514.60mm)	128.33" (3,259.58mm)	10.04" (255.02mm)	110th Driest	Driest since: 1955	1931
Jan 1953–Dec 1956 48-Month	138.37" (3,514.60mm)	128.33" (3,259.58mm)	10.04" (255.02mm)	16th Wettest	Wettest since: 1951	1998
Jan 1952–Dec 1956 60-Month	162.56" (4,129.02mm)	160.34" (4,072.64mm)	2.22" (56.38mm)	75th Driest	Driest since: 1947	1932
	162.56" (4,129.02mm)	160.34" (4,072.64mm)	2.22" (56.38mm)	50th Wettest	Wettest since: 1955	1999
	Ties: 2015

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