Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. 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 2018

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
October 2018
1-Month		2.48"
(62.99mm)		2.54"
(64.52mm)		-0.06"
(-1.53mm)		69th Driest
Driest since:
1895
60th Wettest
Wettest since:
2016
Sep–Oct 2018
2-Month		3.09"
(78.49mm)		3.96"
(100.58mm)		-0.87"
(-22.09mm)		36th Driest
Driest since:
1987
93rd Wettest
Wettest since:
2016
Ties: 1960
Aug–Oct 2018
3-Month		3.43"
(87.12mm)		4.76"
(120.90mm)		-1.33"
(-33.78mm)		25th Driest
Driest since:
1987
104th Wettest
Wettest since:
2016
Jul–Oct 2018
4-Month		3.54"
(89.92mm)		5.49"
(139.45mm)		-1.95"
(-49.53mm)		13th Driest
Driest since:
1952
116th Wettest
Wettest since:
2016
Ties: 2008
Jun–Oct 2018
5-Month		4.90"
(124.46mm)		7.21"
(183.13mm)		-2.31"
(-58.67mm)		14th Driest
Driest since:
1917, 2002
115th Wettest
Wettest since:
1947
May–Oct 2018
6-Month		6.53"
(165.86mm)		9.35"
(237.49mm)		-2.82"
(-71.63mm)		10th Driest
Driest since:
2002
119th Wettest
Wettest since:
1941
Apr–Oct 2018
7-Month		10.15"
(257.81mm)		11.71"
(297.43mm)		-1.56"
(-39.62mm)		32nd Driest
Driest since:
2002
97th Wettest
Wettest since:
1997
Mar–Oct 2018
8-Month		13.31"
(338.07mm)		14.97"
(380.24mm)		-1.66"
(-42.17mm)		38th Driest
Driest since:
1939
91st Wettest
Wettest since:
1997
Feb–Oct 2018
9-Month		16.18"
(410.97mm)		18.58"
(471.93mm)		-2.40"
(-60.96mm)		29th Driest
Driest since:
1929
100th Wettest
Wettest since:
2017
Jan–Oct 2018
10-Month		20.84"
(529.34mm)		23.10"
(586.74mm)		-2.26"
(-57.40mm)		38th Driest
Driest since:
1929
91st Wettest
Wettest since:
1950
Dec 2017–Oct 2018
11-Month		23.84"
(605.54mm)		27.75"
(704.85mm)		-3.91"
(-99.31mm)		22nd Driest
Driest since:
1929
106th Wettest
Wettest since:
1997
Nov 2017–Oct 2018
12-Month		29.45"
(748.03mm)		32.10"
(815.34mm)		-2.65"
(-67.31mm)		34th Driest
Driest since:
1977
94th Wettest
Wettest since:
1997
May 2017–Oct 2018
18-Month		37.95"
(963.93mm)		41.48"
(1,053.59mm)		-3.53"
(-89.66mm)		33rd Driest
Driest since:
1929
95th Wettest
Wettest since:
1997
Nov 2016–Oct 2018
24-Month		66.46"
(1,688.08mm)		64.23"
(1,631.44mm)		2.23"
(56.64mm)		90th Driest
Driest since:
1930
37th Wettest
Wettest since:
1997
Nov 2015–Oct 2018
36-Month		106.15"
(2,696.21mm)		96.31"
(2,446.27mm)		9.84"
(249.94mm)		116th Driest
Driest since:
1931
10th Wettest
Wettest since:
1997
Nov 2014–Oct 2018
48-Month		134.06"
(3,405.12mm)		128.38"
(3,260.85mm)		5.68"
(144.27mm)		94th Driest
Driest since:
1931
31st Wettest
Wettest since:
1999
Nov 2013–Oct 2018
60-Month		165.15"
(4,194.81mm)		160.37"
(4,073.40mm)		4.78"
(121.41mm)		85th Driest
Driest since:
1932
39th Wettest
Wettest since:
1999

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