Climate at a Glance

Regional Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of December 2019. For more information, please see Climatological Rankings.


Northwest Climate Region

Precipitation Rankings, May 2018

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2019)
Wettest/Driest
Since
Record
May 2018
1-Month
1.63"
(41.40mm)
2.14"
(54.36mm)
-0.51"
(-12.96mm)
41st Driest Driest since: 2007 1924
85th Wettest Wettest since: 2017 1998
Apr–May 2018
2-Month
5.25"
(133.35mm)
4.50"
(114.30mm)
0.75"
(19.05mm)
89th Driest Driest since: 2016 1924
37th Wettest Wettest since: 2017 1996
Ties: 1997
Mar–May 2018
3-Month
8.41"
(213.61mm)
7.76"
(197.10mm)
0.65"
(16.51mm)
80th Driest Driest since: 2015 1924
46th Wettest Wettest since: 2017 2011
Ties: 1907
Feb–May 2018
4-Month
11.28"
(286.51mm)
11.37"
(288.80mm)
-0.09"
(-2.29mm)
62nd Driest Driest since: 2015 1924
64th Wettest Wettest since: 2017 1904
Ties: 1955
Jan–May 2018
5-Month
15.94"
(404.88mm)
15.90"
(403.86mm)
0.04"
(1.02mm)
61st Driest Driest since: 2015 1924
65th Wettest Wettest since: 2017 1904
Dec 2017–May 2018
6-Month
18.94"
(481.08mm)
20.54"
(521.72mm)
-1.60"
(-40.64mm)
36th Driest Driest since: 2015 1977
89th Wettest Wettest since: 2017 1997
Ties: 1914
Nov 2017–May 2018
7-Month
24.55"
(623.57mm)
24.89"
(632.21mm)
-0.34"
(-8.64mm)
59th Driest Driest since: 2015 1977
66th Wettest Wettest since: 2017 1974
Ties: 1949
Oct 2017–May 2018
8-Month
27.70"
(703.58mm)
27.45"
(697.23mm)
0.25"
(6.35mm)
65th Driest Driest since: 2015 1977
60th Wettest Wettest since: 2017 1974
Sep 2017–May 2018
9-Month
29.31"
(744.47mm)
28.87"
(733.30mm)
0.44"
(11.17mm)
75th Driest Driest since: 2015 1977
50th Wettest Wettest since: 2017 1974
Aug 2017–May 2018
10-Month
29.55"
(750.57mm)
29.68"
(753.87mm)
-0.13"
(-3.30mm)
67th Driest Driest since: 2015 1977
58th Wettest Wettest since: 2017 1974
Jul 2017–May 2018
11-Month
29.70"
(754.38mm)
30.40"
(772.16mm)
-0.70"
(-17.78mm)
56th Driest Driest since: 2015 1977
69th Wettest Wettest since: 2017 1974
Jun 2017–May 2018
12-Month
31.23"
(793.24mm)
32.13"
(816.10mm)
-0.90"
(-22.86mm)
53rd Driest Driest since: 2015 1977
72nd Wettest Wettest since: 2017 1996
Dec 2016–May 2018
18-Month
57.71"
(1,465.83mm)
52.65"
(1,337.31mm)
5.06"
(128.52mm)
101st Driest Driest since: 2016 1930
23rd Wettest Wettest since: 2017 1997
Jun 2016–May 2018
24-Month
72.20"
(1,833.88mm)
64.28"
(1,632.71mm)
7.92"
(201.17mm)
113th Driest Driest since: 2016 1930
11th Wettest Wettest since: 2017 1997
Jun 2015–May 2018
36-Month
107.07"
(2,719.58mm)
96.36"
(2,447.54mm)
10.71"
(272.04mm)
114th Driest Driest since: 2017 1931
9th Wettest Wettest since: 1999 1998
Jun 2014–May 2018
48-Month
137.38"
(3,489.45mm)
128.40"
(3,261.36mm)
8.98"
(228.09mm)
106th Driest Driest since: 2017 1931
16th Wettest Wettest since: 2000 1999
Jun 2013–May 2018
60-Month
168.42"
(4,277.87mm)
160.37"
(4,073.40mm)
8.05"
(204.47mm)
99th Driest Driest since: 2017 1933
22nd Wettest Wettest since: 2001 1999

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Regional Time Series, published January 2020, retrieved on January 25, 2020 from https://www.ncdc.noaa.gov/cag/