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 January 2021. For more information, please see Climatological Rankings.


Northwest Climate Region

Precipitation Rankings, September 2017

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Wettest/Driest
Since
Record
September 2017
1-Month
1.61"
(40.89mm)
1.42"
(36.07mm)
0.19"
(4.82mm)
86th Driest Driest since: 2016 1975
41st Wettest Wettest since: 2013 2013
Ties: 1930
Aug–Sep 2017
2-Month
1.85"
(46.99mm)
2.22"
(56.39mm)
-0.37"
(-9.40mm)
52nd Driest Driest since: 2016 2012
75th Wettest Wettest since: 2015 2013
Ties: 1992
Jul–Sep 2017
3-Month
2.00"
(50.80mm)
2.95"
(74.93mm)
-0.95"
(-24.13mm)
26th Driest Driest since: 2012 1929
101st Wettest Wettest since: 2016 1978
Jun–Sep 2017
4-Month
3.53"
(89.66mm)
4.67"
(118.62mm)
-1.14"
(-28.96mm)
32nd Driest Driest since: 2016 2003
95th Wettest Wettest since: 2014 1941
May–Sep 2017
5-Month
5.35"
(135.89mm)
6.81"
(172.97mm)
-1.46"
(-37.08mm)
27th Driest Driest since: 2016 1928
100th Wettest Wettest since: 2015 1941
Apr–Sep 2017
6-Month
9.19"
(233.43mm)
9.17"
(232.92mm)
0.02"
(0.51mm)
65th Driest Driest since: 2016 1924
62nd Wettest Wettest since: 2014 1948
Mar–Sep 2017
7-Month
15.17"
(385.32mm)
12.43"
(315.72mm)
2.74"
(69.60mm)
116th Driest Driest since: 2016 1924
11th Wettest Wettest since: 2012 1948
Feb–Sep 2017
8-Month
21.31"
(541.27mm)
16.04"
(407.42mm)
5.27"
(133.85mm)
123rd Driest Driest since: 2016 1924
4th Wettest Wettest since: 1983 1983
Jan–Sep 2017
9-Month
25.38"
(644.65mm)
20.57"
(522.48mm)
4.81"
(122.17mm)
120th Driest Driest since: 2016 1924
7th Wettest Wettest since: 1997 1983
Dec 2016–Sep 2017
10-Month
30.01"
(762.25mm)
25.21"
(640.33mm)
4.80"
(121.92mm)
115th Driest Driest since: 2016 2001
11th Wettest Wettest since: 1997 1997
Nov 2016–Sep 2017
11-Month
33.86"
(860.04mm)
29.56"
(750.82mm)
4.30"
(109.22mm)
106th Driest Driest since: 2016 2001
20th Wettest Wettest since: 2011 1997
Oct 2016–Sep 2017
12-Month
41.02"
(1,041.91mm)
32.12"
(815.85mm)
8.90"
(226.06mm)
123rd Driest Driest since: 2016 1977
3rd Wettest Wettest since: 1997 1997
Apr 2016–Sep 2017
18-Month
47.96"
(1,218.18mm)
41.30"
(1,049.02mm)
6.66"
(169.16mm)
111th Driest Driest since: 2016 1929, 2001
15th Wettest Wettest since: 2011 1997
Oct 2015–Sep 2017
24-Month
76.01"
(1,930.65mm)
64.26"
(1,632.20mm)
11.75"
(298.45mm)
118th Driest Driest since: 2016 1930
7th Wettest Wettest since: 1998 1997
Oct 2014–Sep 2017
36-Month
104.90"
(2,664.46mm)
96.34"
(2,447.04mm)
8.56"
(217.42mm)
111th Driest Driest since: 2016 1931
13th Wettest Wettest since: 1999 1997
Oct 2013–Sep 2017
48-Month
133.59"
(3,393.19mm)
128.40"
(3,261.36mm)
5.19"
(131.83mm)
95th Driest Driest since: 2016 1931
28th Wettest Wettest since: 2013 1998
Oct 2012–Sep 2017
60-Month
167.61"
(4,257.29mm)
160.37"
(4,073.40mm)
7.24"
(183.89mm)
95th Driest Driest since: 2016 1932
27th Wettest Wettest since: 2001 1999

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Regional Time Series, published February 2021, retrieved on March 6, 2021 from https://www.ncdc.noaa.gov/cag/