Climate at a Glance

National 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 August 2019. For more information, please see Climatological Rankings.


Contiguous U.S.

Precipitation Rankings, September 2017

View Period (Months):All1234567891011121824364860
Download: xml csv json
  • Record Driest
  • Bottom 1/10
  • Bottom 1/3
  • Normal
  • Top 1/3
  • Top 1/10
  • Record Wettest
Period Value 1901-2000
Mean
Amomaly Rank
(1895-2018)
Wettest/Driest
Since
Record
September 2017
1-Month
2.27"
(57.66mm)
2.49"
(63.25mm)
-0.22"
(-5.59mm)
39th Driest Driest since: 2015 1956
86th Wettest Wettest since: 2016 1986
Aug–Sep 2017
2-Month
5.69"
(144.53mm)
5.11"
(129.79mm)
0.58"
(14.74mm)
104th Driest Driest since: 2015 1956
21st Wettest Wettest since: 2016 1977
Jul–Sep 2017
3-Month
8.49"
(215.65mm)
7.88"
(200.15mm)
0.61"
(15.50mm)
96th Driest Driest since: 2015 1930
29th Wettest Wettest since: 2016 1915
Jun–Sep 2017
4-Month
11.56"
(293.62mm)
10.81"
(274.57mm)
0.75"
(19.05mm)
98th Driest Driest since: 2015 1930
27th Wettest Wettest since: 2016 1915
May–Sep 2017
5-Month
14.92"
(378.97mm)
13.72"
(348.49mm)
1.20"
(30.48mm)
105th Driest Driest since: 2016 1956
20th Wettest Wettest since: 2015 1915
Apr–Sep 2017
6-Month
18.42"
(467.87mm)
16.24"
(412.50mm)
2.18"
(55.37mm)
118th Driest Driest since: 2016 1956
7th Wettest Wettest since: 2015 1915
Ties: 1945, 2004
Mar–Sep 2017
7-Month
21.01"
(533.65mm)
18.75"
(476.25mm)
2.26"
(57.40mm)
117th Driest Driest since: 2016 1956
8th Wettest Wettest since: 1991 1973
Feb–Sep 2017
8-Month
23.26"
(590.80mm)
20.88"
(530.35mm)
2.38"
(60.45mm)
117th Driest Driest since: 2016 1930
8th Wettest Wettest since: 1975 1945
Jan–Sep 2017
9-Month
26.50"
(673.10mm)
23.20"
(589.28mm)
3.30"
(83.82mm)
124th Driest Driest since: 2016 1934
1st Wettest Wettest to Date 2017
Dec 2016–Sep 2017
10-Month
29.22"
(742.19mm)
25.54"
(648.72mm)
3.68"
(93.47mm)
122nd Driest Driest since: 2016 1931
2nd Wettest Wettest since: 1973 1973
Nov 2016–Sep 2017
11-Month
30.97"
(786.64mm)
27.77"
(705.36mm)
3.20"
(81.28mm)
117th Driest Driest since: 2015 1934
7th Wettest Wettest since: 2016 1993
Oct 2016–Sep 2017
12-Month
33.36"
(847.34mm)
29.94"
(760.48mm)
3.42"
(86.86mm)
115th Driest Driest since: 2015 1934
9th Wettest Wettest since: 2016 1973
Apr 2016–Sep 2017
18-Month
51.03"
(1,296.16mm)
46.20"
(1,173.48mm)
4.83"
(122.68mm)
117th Driest Driest since: 2015 1931
7th Wettest Wettest since: 2016 2016
Oct 2015–Sep 2017
24-Month
68.23"
(1,733.04mm)
59.92"
(1,521.97mm)
8.31"
(211.07mm)
122nd Driest Driest since: 2016 1918
1st Wettest Wettest to Date 2017
Oct 2014–Sep 2017
36-Month
99.64"
(2,530.86mm)
89.87"
(2,282.70mm)
9.77"
(248.16mm)
120th Driest Driest since: 2016 1956
2nd Wettest Wettest since: 1975 1975
Oct 2013–Sep 2017
48-Month
129.84"
(3,297.94mm)
119.78"
(3,042.41mm)
10.06"
(255.53mm)
116th Driest Driest since: 2016 1956
5th Wettest Wettest since: 1999 1998
Oct 2012–Sep 2017
60-Month
160.85"
(4,085.59mm)
149.66"
(3,801.36mm)
11.19"
(284.23mm)
113th Driest Driest since: 2016 1956
7th Wettest Wettest since: 1999 1999

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, published September 2019, retrieved on September 20, 2019 from https://www.ncdc.noaa.gov/cag/