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, August 2018

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
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
August 2018
1-Month
2.98"
(75.69mm)
2.62"
(66.55mm)
0.36"
(9.14mm)
105th Driest Driest since: 2015 1929
23rd Wettest Wettest since: 2017 1977
Jul–Aug 2018
2-Month
5.84"
(148.34mm)
5.40"
(137.16mm)
0.44"
(11.18mm)
102nd Driest Driest since: 2015 1930
26th Wettest Wettest since: 2017 1915
Jun–Aug 2018
3-Month
8.99"
(228.35mm)
8.32"
(211.33mm)
0.67"
(17.02mm)
105th Driest Driest since: 2016 1930
23rd Wettest Wettest since: 2017 1928
Ties: 1916, 1920
May–Aug 2018
4-Month
12.01"
(305.05mm)
11.23"
(285.24mm)
0.78"
(19.81mm)
96th Driest Driest since: 2016 1936
32nd Wettest Wettest since: 2017 1915
Apr–Aug 2018
5-Month
14.47"
(367.54mm)
13.75"
(349.25mm)
0.72"
(18.29mm)
89th Driest Driest since: 2012 1934
39th Wettest Wettest since: 2017 2019
Mar–Aug 2018
6-Month
16.95"
(430.53mm)
16.26"
(413.00mm)
0.69"
(17.53mm)
82nd Driest Driest since: 2012 1936
46th Wettest Wettest since: 2017 1905
Feb–Aug 2018
7-Month
19.84"
(503.94mm)
18.40"
(467.36mm)
1.44"
(36.58mm)
101st Driest Driest since: 2016 1934
27th Wettest Wettest since: 2017 2019
Jan–Aug 2018
8-Month
21.69"
(550.93mm)
20.71"
(526.03mm)
0.98"
(24.90mm)
93rd Driest Driest since: 2014 1934
35th Wettest Wettest since: 2017 2019
Dec 2017–Aug 2018
9-Month
23.28"
(591.31mm)
23.05"
(585.47mm)
0.23"
(5.84mm)
60th Driest Driest since: 2012 1931
67th Wettest Wettest since: 2017 2019
Ties: 1900
Nov 2017–Aug 2018
10-Month
24.90"
(632.46mm)
25.28"
(642.11mm)
-0.38"
(-9.65mm)
46th Driest Driest since: 2012 1934
81st Wettest Wettest since: 2017 2019
Oct 2017–Aug 2018
11-Month
27.50"
(698.50mm)
27.45"
(697.23mm)
0.05"
(1.27mm)
56th Driest Driest since: 2012 1934
71st Wettest Wettest since: 2017 2019
Sep 2017–Aug 2018
12-Month
29.77"
(756.16mm)
29.94"
(760.48mm)
-0.17"
(-4.32mm)
52nd Driest Driest since: 2012 1934
75th Wettest Wettest since: 2017 2019
Mar 2017–Aug 2018
18-Month
48.51"
(1,232.15mm)
46.22"
(1,173.99mm)
2.29"
(58.16mm)
93rd Driest Driest since: 2014 1931
34th Wettest Wettest since: 2017 2019
Sep 2016–Aug 2018
24-Month
63.59"
(1,615.19mm)
59.92"
(1,521.97mm)
3.67"
(93.22mm)
104th Driest Driest since: 2015 1918
22nd Wettest Wettest since: 2017 2020
Sep 2015–Aug 2018
36-Month
97.85"
(2,485.39mm)
89.86"
(2,282.44mm)
7.99"
(202.95mm)
114th Driest Driest since: 2016 1956
11th Wettest Wettest since: 2017 2019
Sep 2014–Aug 2018
48-Month
129.78"
(3,296.41mm)
119.77"
(3,042.16mm)
10.01"
(254.25mm)
117th Driest Driest since: 2016 1956
7th Wettest Wettest since: 2017 2019
Sep 2013–Aug 2018
60-Month
160.32"
(4,072.13mm)
149.64"
(3,800.86mm)
10.68"
(271.27mm)
114th Driest Driest since: 2016 1934
9th Wettest Wettest since: 2017 2019

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, published September 2021, retrieved on September 22, 2021 from https://www.ncdc.noaa.gov/cag/