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 2021. 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
Anomaly Rank
(1895-2020)
Wettest/Driest
Since
Record
September 2018
1-Month
3.57"
(90.68mm)
2.49"
(63.25mm)
1.08"
(27.43mm)
125th 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)
125th 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)
124th Driest Driest since: 2017 1930
3rd Wettest Wettest since: 1915 1915
Jun–Sep 2018
4-Month
12.56"
(319.02mm)
10.81"
(274.57mm)
1.75"
(44.45mm)
121st Driest Driest since: 2017 1930
6th Wettest Wettest since: 2004 1915
May–Sep 2018
5-Month
15.58"
(395.73mm)
13.72"
(348.49mm)
1.86"
(47.24mm)
120th Driest Driest since: 2017 1956
7th Wettest Wettest since: 2015 1915
Apr–Sep 2018
6-Month
18.04"
(458.22mm)
16.24"
(412.50mm)
1.80"
(45.72mm)
115th Driest Driest since: 2016 1956
12th Wettest Wettest since: 2017 1915
Mar–Sep 2018
7-Month
20.52"
(521.21mm)
18.75"
(476.25mm)
1.77"
(44.96mm)
110th Driest Driest since: 2014 1956
17th Wettest Wettest since: 2017 1973
Feb–Sep 2018
8-Month
23.41"
(594.61mm)
20.88"
(530.35mm)
2.53"
(64.26mm)
119th Driest Driest since: 2017 1930
8th Wettest Wettest since: 1975 2019
Jan–Sep 2018
9-Month
25.26"
(641.60mm)
23.20"
(589.28mm)
2.06"
(52.32mm)
113th Driest Driest since: 2016 1934
14th Wettest Wettest since: 2017 2019
Dec 2017–Sep 2018
10-Month
26.85"
(681.99mm)
25.54"
(648.72mm)
1.31"
(33.27mm)
90th Driest Driest since: 2014 1931
36th Wettest Wettest since: 2017 2019
Ties: 1907
Nov 2017–Sep 2018
11-Month
28.47"
(723.14mm)
27.77"
(705.36mm)
0.70"
(17.78mm)
75th Driest Driest since: 2014 1934
51st Wettest Wettest since: 2017 2019
Oct 2017–Sep 2018
12-Month
31.07"
(789.18mm)
29.94"
(760.48mm)
1.13"
(28.70mm)
80th Driest Driest since: 2014 1934
46th Wettest Wettest since: 2017 2019
Apr 2017–Sep 2018
18-Month
49.49"
(1,257.05mm)
46.20"
(1,173.48mm)
3.29"
(83.57mm)
108th Driest Driest since: 2015 1931
18th Wettest Wettest since: 2017 2019
Oct 2016–Sep 2018
24-Month
64.43"
(1,636.52mm)
59.92"
(1,521.97mm)
4.51"
(114.55mm)
110th Driest Driest since: 2015 1918
15th Wettest Wettest since: 2017 2020
Oct 2015–Sep 2018
36-Month
99.30"
(2,522.22mm)
89.87"
(2,282.70mm)
9.43"
(239.52mm)
119th Driest Driest since: 2016 1956
5th Wettest Wettest since: 2017 2019
Oct 2014–Sep 2018
48-Month
130.71"
(3,320.03mm)
119.78"
(3,042.41mm)
10.93"
(277.62mm)
118th Driest Driest since: 2017 1956
5th Wettest Wettest since: 1998 2019
Oct 2013–Sep 2018
60-Month
160.91"
(4,087.11mm)
149.66"
(3,801.36mm)
11.25"
(285.75mm)
114th Driest Driest since: 2017 1956
8th Wettest Wettest since: 1999 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, published September 2021, retrieved on September 26, 2021 from https://www.ncdc.noaa.gov/cag/