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 1939

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
October 1939 1-Month	2.28" (57.91mm)	2.54" (64.52mm)	-0.26" (-6.61mm)	56th Driest	Driest since: 1936	1895
October 1939 1-Month	2.28" (57.91mm)	2.54" (64.52mm)	-0.26" (-6.61mm)	73rd Wettest	Wettest since: 1938	2016
Sep–Oct 1939 2-Month	3.19" (81.03mm)	3.96" (100.58mm)	-0.77" (-19.55mm)	40th Driest	Driest since: 1936	1987
Sep–Oct 1939 2-Month	3.19" (81.03mm)	3.96" (100.58mm)	-0.77" (-19.55mm)	89th Wettest	Wettest since: 1938	2016
Aug–Oct 1939 3-Month	3.56" (90.42mm)	4.76" (120.90mm)	-1.20" (-30.48mm)	30th Driest	Driest since: 1936	1987
Aug–Oct 1939 3-Month	3.56" (90.42mm)	4.76" (120.90mm)	-1.20" (-30.48mm)	99th Wettest	Wettest since: 1938	2016
Jul–Oct 1939 4-Month	4.30" (109.22mm)	5.49" (139.45mm)	-1.19" (-30.23mm)	27th Driest	Driest since: 1936	1952
	4.30" (109.22mm)	5.49" (139.45mm)	-1.19" (-30.23mm)	102nd Wettest	Wettest since: 1938	2016
	Ties: 2003
Jun–Oct 1939 5-Month	5.69" (144.53mm)	7.21" (183.13mm)	-1.52" (-38.60mm)	27th Driest	Driest since: 1936	1917, 2002
Jun–Oct 1939 5-Month	5.69" (144.53mm)	7.21" (183.13mm)	-1.52" (-38.60mm)	102nd Wettest	Wettest since: 1938	1947
May–Oct 1939 6-Month	7.01" (178.05mm)	9.35" (237.49mm)	-2.34" (-59.44mm)	16th Driest	Driest since: 1935	2002
May–Oct 1939 6-Month	7.01" (178.05mm)	9.35" (237.49mm)	-2.34" (-59.44mm)	113th Wettest	Wettest since: 1938	1941
Apr–Oct 1939 7-Month	7.80" (198.12mm)	11.71" (297.43mm)	-3.91" (-99.31mm)	4th Driest	Driest since: 1939	2002
Apr–Oct 1939 7-Month	7.80" (198.12mm)	11.71" (297.43mm)	-3.91" (-99.31mm)	125th Wettest	Wettest since: 1938	1997
Mar–Oct 1939 8-Month	10.22" (259.59mm)	14.97" (380.24mm)	-4.75" (-120.65mm)	1st Driest	Driest since: 1939	1939
Mar–Oct 1939 8-Month	10.22" (259.59mm)	14.97" (380.24mm)	-4.75" (-120.65mm)	128th Wettest	Wettest since: 1938	1997
Feb–Oct 1939 9-Month	14.03" (356.36mm)	18.58" (471.93mm)	-4.55" (-115.57mm)	7th Driest	Driest since: 1935	1929
Feb–Oct 1939 9-Month	14.03" (356.36mm)	18.58" (471.93mm)	-4.55" (-115.57mm)	122nd Wettest	Wettest since: 1938	2017
Jan–Oct 1939 10-Month	17.77" (451.36mm)	23.10" (586.74mm)	-5.33" (-135.38mm)	5th Driest	Driest since: 1929	1929
Jan–Oct 1939 10-Month	17.77" (451.36mm)	23.10" (586.74mm)	-5.33" (-135.38mm)	124th Wettest	Wettest since: 1938	1950
Dec 1938–Oct 1939 11-Month	20.96" (532.38mm)	27.75" (704.85mm)	-6.79" (-172.47mm)	6th Driest	Driest since: 1929	1929
Dec 1938–Oct 1939 11-Month	20.96" (532.38mm)	27.75" (704.85mm)	-6.79" (-172.47mm)	122nd Wettest	Wettest since: 1938	1997
Nov 1938–Oct 1939 12-Month	24.43" (620.52mm)	32.10" (815.34mm)	-7.67" (-194.82mm)	7th Driest	Driest since: 1931	1977
Nov 1938–Oct 1939 12-Month	24.43" (620.52mm)	32.10" (815.34mm)	-7.67" (-194.82mm)	121st Wettest	Wettest since: 1938	1997
May 1938–Oct 1939 18-Month	32.32" (820.93mm)	41.48" (1,053.59mm)	-9.16" (-232.66mm)	6th Driest	Driest since: 1930	1929
May 1938–Oct 1939 18-Month	32.32" (820.93mm)	41.48" (1,053.59mm)	-9.16" (-232.66mm)	122nd Wettest	Wettest since: 1938	1997
Nov 1937–Oct 1939 24-Month	60.91" (1,547.11mm)	64.23" (1,631.44mm)	-3.32" (-84.33mm)	39th Driest	Driest since: 1937	1930
Nov 1937–Oct 1939 24-Month	60.91" (1,547.11mm)	64.23" (1,631.44mm)	-3.32" (-84.33mm)	88th Wettest	Wettest since: 1938	1997
Nov 1936–Oct 1939 36-Month	90.11" (2,288.79mm)	96.31" (2,446.27mm)	-6.20" (-157.48mm)	29th Driest	Driest since: 1937	1931
Nov 1936–Oct 1939 36-Month	90.11" (2,288.79mm)	96.31" (2,446.27mm)	-6.20" (-157.48mm)	97th Wettest	Wettest since: 1938	1997
Nov 1935–Oct 1939 48-Month	118.40" (3,007.36mm)	128.38" (3,260.85mm)	-9.98" (-253.49mm)	18th Driest	Driest since: 1937	1931
Nov 1935–Oct 1939 48-Month	118.40" (3,007.36mm)	128.38" (3,260.85mm)	-9.98" (-253.49mm)	107th Wettest	Wettest since: 1938	1999
Nov 1934–Oct 1939 60-Month	147.14" (3,737.36mm)	160.37" (4,073.40mm)	-13.23" (-336.04mm)	15th Driest	Driest since: 1934	1932
Nov 1934–Oct 1939 60-Month	147.14" (3,737.36mm)	160.37" (4,073.40mm)	-13.23" (-336.04mm)	109th Wettest	Wettest since: 1938	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