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


Contiguous U.S.

Precipitation Rankings, September 2018

View Period (Months):All1234567891011121824364860
Download: xml csv json
  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Amomaly Rank
(1895-2018)
Wettest/Driest
Since
Record
September 2018
1-Month
3.57"
(90.68mm)
2.49"
(63.25mm)
1.08"
(27.43mm)
123rd Driest Driest since: 2017 1956
2nd Wettest Wettest since: 1986 1986
Aug–Sep 2018
2-Month
6.55"
(166.37mm)
5.11"
(129.79mm)
1.44"
(36.58mm)
123rd Driest Driest since: 2017 1956
2nd Wettest Wettest since: 1977 1977
Jul–Sep 2018
3-Month
9.41"
(239.01mm)
7.88"
(200.15mm)
1.53"
(38.86mm)
122nd Driest Driest since: 2017 1930
3rd Wettest Wettest since: 1915 1915
Jun–Sep 2018
4-Month
12.57"
(319.28mm)
10.81"
(274.57mm)
1.76"
(44.71mm)
119th Driest Driest since: 2017 1930
6th Wettest Wettest since: 2004 1915
May–Sep 2018
5-Month
15.59"
(395.99mm)
13.72"
(348.49mm)
1.87"
(47.50mm)
119th Driest Driest since: 2017 1956
6th Wettest Wettest since: 2015 1915
Apr–Sep 2018
6-Month
18.05"
(458.47mm)
16.24"
(412.50mm)
1.81"
(45.97mm)
114th Driest Driest since: 2016 1956
11th Wettest Wettest since: 2017 1915
Mar–Sep 2018
7-Month
20.52"
(521.21mm)
18.75"
(476.25mm)
1.77"
(44.96mm)
109th Driest Driest since: 2014 1956
16th Wettest Wettest since: 2017 1973
Feb–Sep 2018
8-Month
23.40"
(594.36mm)
20.88"
(530.35mm)
2.52"
(64.01mm)
118th Driest Driest since: 2017 1930
7th Wettest Wettest since: 1975 1945
Jan–Sep 2018
9-Month
25.25"
(641.35mm)
23.20"
(589.28mm)
2.05"
(52.07mm)
112th Driest Driest since: 2016 1934
13th Wettest Wettest since: 2017 2017
Dec 2017–Sep 2018
10-Month
26.84"
(681.74mm)
25.54"
(648.72mm)
1.30"
(33.02mm)
88th Driest Driest since: 2014 1931
36th Wettest Wettest since: 2017 1973
Nov 2017–Sep 2018
11-Month
28.46"
(722.88mm)
27.77"
(705.36mm)
0.69"
(17.52mm)
75th Driest Driest since: 2014 1934
49th Wettest Wettest since: 2017 1993
Oct 2017–Sep 2018
12-Month
31.06"
(788.92mm)
29.94"
(760.48mm)
1.12"
(28.44mm)
80th Driest Driest since: 2014 1934
44th Wettest Wettest since: 2017 1973
Apr 2017–Sep 2018
18-Month
49.48"
(1,256.79mm)
46.20"
(1,173.48mm)
3.28"
(83.31mm)
108th Driest Driest since: 2015 1931
16th Wettest Wettest since: 2017 2016
Oct 2016–Sep 2018
24-Month
64.42"
(1,636.27mm)
59.92"
(1,521.97mm)
4.50"
(114.30mm)
110th Driest Driest since: 2015 1918
13th Wettest Wettest since: 2017 2017
Oct 2015–Sep 2018
36-Month
99.29"
(2,521.97mm)
89.87"
(2,282.70mm)
9.42"
(239.27mm)
119th Driest Driest since: 2016 1956
3rd Wettest Wettest since: 2017 1975
Oct 2014–Sep 2018
48-Month
130.70"
(3,319.78mm)
119.78"
(3,042.41mm)
10.92"
(277.37mm)
118th Driest Driest since: 2017 1956
3rd Wettest Wettest since: 1998 1998
Oct 2013–Sep 2018
60-Month
160.90"
(4,086.86mm)
149.66"
(3,801.36mm)
11.24"
(285.50mm)
114th Driest Driest since: 2017 1956
6th Wettest Wettest since: 1999 1999

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, published August 2019, retrieved on August 19, 2019 from https://www.ncdc.noaa.gov/cag/