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 1917

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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
October 1917 1-Month	0.34" (8.64mm)	2.54" (64.52mm)	-2.20" (-55.88mm)	3rd Driest	Driest since: 1895	1895
October 1917 1-Month	0.34" (8.64mm)	2.54" (64.52mm)	-2.20" (-55.88mm)	126th Wettest	Wettest since: 1916	2016
Sep–Oct 1917 2-Month	2.04" (51.82mm)	3.96" (100.58mm)	-1.92" (-48.76mm)	9th Driest	Driest since: 1917	1987
Sep–Oct 1917 2-Month	2.04" (51.82mm)	3.96" (100.58mm)	-1.92" (-48.76mm)	120th Wettest	Wettest since: 1916	2016
Aug–Oct 1917 3-Month	2.18" (55.37mm)	4.76" (120.90mm)	-2.58" (-65.53mm)	7th Driest	Driest since: 1917	1987
Aug–Oct 1917 3-Month	2.18" (55.37mm)	4.76" (120.90mm)	-2.58" (-65.53mm)	122nd Wettest	Wettest since: 1916	2016
Jul–Oct 1917 4-Month	2.38" (60.45mm)	5.49" (139.45mm)	-3.11" (-79.00mm)	4th Driest	Driest since: 1917	1952
Jul–Oct 1917 4-Month	2.38" (60.45mm)	5.49" (139.45mm)	-3.11" (-79.00mm)	125th Wettest	Wettest since: 1916	2016
Jun–Oct 1917 5-Month	3.50" (88.90mm)	7.21" (183.13mm)	-3.71" (-94.23mm)	1st Driest	Driest since: 1917	1917, 2002
	3.50" (88.90mm)	7.21" (183.13mm)	-3.71" (-94.23mm)	128th Wettest	Wettest since: 1916	1947
	Ties: 2002
May–Oct 1917 6-Month	5.87" (149.10mm)	9.35" (237.49mm)	-3.48" (-88.39mm)	6th Driest	Driest since: 1917	2002
May–Oct 1917 6-Month	5.87" (149.10mm)	9.35" (237.49mm)	-3.48" (-88.39mm)	123rd Wettest	Wettest since: 1916	1941
Apr–Oct 1917 7-Month	9.61" (244.09mm)	11.71" (297.43mm)	-2.10" (-53.34mm)	22nd Driest	Driest since: 1910	2002
Apr–Oct 1917 7-Month	9.61" (244.09mm)	11.71" (297.43mm)	-2.10" (-53.34mm)	107th Wettest	Wettest since: 1916	1997
Mar–Oct 1917 8-Month	13.29" (337.57mm)	14.97" (380.24mm)	-1.68" (-42.67mm)	37th Driest	Driest since: 1911	1939
Mar–Oct 1917 8-Month	13.29" (337.57mm)	14.97" (380.24mm)	-1.68" (-42.67mm)	92nd Wettest	Wettest since: 1916	1997
Feb–Oct 1917 9-Month	16.74" (425.20mm)	18.58" (471.93mm)	-1.84" (-46.73mm)	37th Driest	Driest since: 1911	1929
Feb–Oct 1917 9-Month	16.74" (425.20mm)	18.58" (471.93mm)	-1.84" (-46.73mm)	92nd Wettest	Wettest since: 1916	2017
Jan–Oct 1917 10-Month	19.87" (504.70mm)	23.10" (586.74mm)	-3.23" (-82.04mm)	30th Driest	Driest since: 1911	1929
Jan–Oct 1917 10-Month	19.87" (504.70mm)	23.10" (586.74mm)	-3.23" (-82.04mm)	99th Wettest	Wettest since: 1916	1950
Dec 1916–Oct 1917 11-Month	23.94" (608.08mm)	27.75" (704.85mm)	-3.81" (-96.77mm)	24th Driest	Driest since: 1915	1929
Dec 1916–Oct 1917 11-Month	23.94" (608.08mm)	27.75" (704.85mm)	-3.81" (-96.77mm)	104th Wettest	Wettest since: 1916	1997
Nov 1916–Oct 1917 12-Month	27.54" (699.52mm)	32.10" (815.34mm)	-4.56" (-115.82mm)	18th Driest	Driest since: 1915	1977
Nov 1916–Oct 1917 12-Month	27.54" (699.52mm)	32.10" (815.34mm)	-4.56" (-115.82mm)	110th Wettest	Wettest since: 1916	1997
May 1916–Oct 1917 18-Month	36.31" (922.27mm)	41.48" (1,053.59mm)	-5.17" (-131.32mm)	20th Driest	Driest since: 1915	1929
May 1916–Oct 1917 18-Month	36.31" (922.27mm)	41.48" (1,053.59mm)	-5.17" (-131.32mm)	108th Wettest	Wettest since: 1916	1997
Nov 1915–Oct 1917 24-Month	65.54" (1,664.72mm)	64.23" (1,631.44mm)	1.31" (33.28mm)	80th Driest	Driest since: 1916	1930
Nov 1915–Oct 1917 24-Month	65.54" (1,664.72mm)	64.23" (1,631.44mm)	1.31" (33.28mm)	47th Wettest	Wettest since: 1913	1997
Nov 1914–Oct 1917 36-Month	90.87" (2,308.10mm)	96.31" (2,446.27mm)	-5.44" (-138.17mm)	34th Driest	Driest since: 1915	1931
Nov 1914–Oct 1917 36-Month	90.87" (2,308.10mm)	96.31" (2,446.27mm)	-5.44" (-138.17mm)	92nd Wettest	Wettest since: 1916	1997
Nov 1913–Oct 1917 48-Month	123.60" (3,139.44mm)	128.38" (3,260.85mm)	-4.78" (-121.41mm)	39th Driest	Driest since: 1917	1931
Nov 1913–Oct 1917 48-Month	123.60" (3,139.44mm)	128.38" (3,260.85mm)	-4.78" (-121.41mm)	86th Wettest	Wettest since: 1916	1999
Nov 1912–Oct 1917 60-Month	155.49" (3,949.45mm)	160.37" (4,073.40mm)	-4.88" (-123.95mm)	42nd Driest	Driest since: 1915	1932
Nov 1912–Oct 1917 60-Month	155.49" (3,949.45mm)	160.37" (4,073.40mm)	-4.88" (-123.95mm)	82nd Wettest	Wettest since: 1916	1999

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: Regional Rankings, published January 2023, retrieved on February 3, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/regional/rankings