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 September 2019. For more information, please see Climatological Rankings.


Northwest Climate Region

Precipitation Rankings, December 2017

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2018)
Wettest/Driest
Since
Record
December 2017
1-Month
3.00"
(76.20mm)
4.63"
(117.60mm)
-1.63"
(-41.40mm)
21st Driest Driest since: 2013 1976
104th Wettest Wettest since: 2016 1964
Nov–Dec 2017
2-Month
8.61"
(218.69mm)
8.97"
(227.84mm)
-0.36"
(-9.15mm)
57th Driest Driest since: 2016 1976
68th Wettest Wettest since: 2015 1996
Oct–Dec 2017
3-Month
11.76"
(298.70mm)
11.51"
(292.35mm)
0.25"
(6.35mm)
63rd Driest Driest since: 2013 1976
62nd Wettest Wettest since: 2016 1996
Sep–Dec 2017
4-Month
13.37"
(339.60mm)
12.93"
(328.42mm)
0.44"
(11.18mm)
66th Driest Driest since: 2013 1976
59th Wettest Wettest since: 2016 1996
Aug–Dec 2017
5-Month
13.61"
(345.69mm)
13.73"
(348.74mm)
-0.12"
(-3.05mm)
62nd Driest Driest since: 2013 1936
63rd Wettest Wettest since: 2016 1996
Jul–Dec 2017
6-Month
13.76"
(349.50mm)
14.46"
(367.28mm)
-0.70"
(-17.78mm)
55th Driest Driest since: 2013 1936
70th Wettest Wettest since: 2016 1996
Jun–Dec 2017
7-Month
15.29"
(388.37mm)
16.18"
(410.97mm)
-0.89"
(-22.60mm)
56th Driest Driest since: 2013 1976
69th Wettest Wettest since: 2016 1996
May–Dec 2017
8-Month
17.11"
(434.59mm)
18.32"
(465.33mm)
-1.21"
(-30.74mm)
48th Driest Driest since: 2013 1935
77th Wettest Wettest since: 2016 1996
Apr–Dec 2017
9-Month
20.95"
(532.13mm)
20.67"
(525.02mm)
0.28"
(7.11mm)
68th Driest Driest since: 2013 1976
57th Wettest Wettest since: 2016 1996
Ties: 1994
Mar–Dec 2017
10-Month
26.93"
(684.02mm)
23.93"
(607.82mm)
3.00"
(76.20mm)
96th Driest Driest since: 2015 1976
29th Wettest Wettest since: 2016 1996
Feb–Dec 2017
11-Month
33.07"
(839.98mm)
27.54"
(699.52mm)
5.53"
(140.46mm)
110th Driest Driest since: 2016 1935
15th Wettest Wettest since: 2014 1996
Jan–Dec 2017
12-Month
37.14"
(943.36mm)
32.07"
(814.58mm)
5.07"
(128.78mm)
110th Driest Driest since: 2016 1929
15th Wettest Wettest since: 2012 1996
Jul 2016–Dec 2017
18-Month
55.09"
(1,399.29mm)
46.58"
(1,183.13mm)
8.51"
(216.16mm)
117th Driest Driest since: 2016 1929
7th Wettest Wettest since: 1997 1996
Jan 2016–Dec 2017
24-Month
72.45"
(1,840.23mm)
64.19"
(1,630.43mm)
8.26"
(209.80mm)
112th Driest Driest since: 2016 1930
12th Wettest Wettest since: 1999 1996
Jan 2015–Dec 2017
36-Month
103.59"
(2,631.19mm)
96.33"
(2,446.78mm)
7.26"
(184.41mm)
106th Driest Driest since: 2016 1930
17th Wettest Wettest since: 2012 1997
Jan 2014–Dec 2017
48-Month
139.57"
(3,545.08mm)
128.33"
(3,259.58mm)
11.24"
(285.50mm)
110th Driest Driest since: 2016 1931
12th Wettest Wettest since: 1999 1998
Jan 2013–Dec 2017
60-Month
164.08"
(4,167.63mm)
160.34"
(4,072.64mm)
3.74"
(94.99mm)
81st Driest Driest since: 2015 1932
40th Wettest Wettest since: 2016 1999

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Regional Time Series, published October 2019, retrieved on October 23, 2019 from https://www.ncdc.noaa.gov/cag/