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


Contiguous U.S.

Precipitation Rankings, September 1978

View Period (Months):All1234567891011121824364860
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Wettest/Driest
Since
Record
September 1978
1-Month
2.44"
(61.98mm)
2.49"
(63.25mm)
-0.05"
(-1.27mm)
51st Driest Driest since: 1969 1956
76th Wettest Wettest since: 1977 1986
Ties: 1918, 1920, 1966, 2020
Aug–Sep 1978
2-Month
5.21"
(132.33mm)
5.11"
(129.79mm)
0.10"
(2.54mm)
72nd Driest Driest since: 1976 1956
55th Wettest Wettest since: 1977 1977
Jul–Sep 1978
3-Month
7.96"
(202.18mm)
7.88"
(200.15mm)
0.08"
(2.03mm)
72nd Driest Driest since: 1976 1930
55th Wettest Wettest since: 1977 1915
Ties: 1966, 1968
Jun–Sep 1978
4-Month
10.51"
(266.95mm)
10.81"
(274.57mm)
-0.30"
(-7.62mm)
42nd Driest Driest since: 1976 1930
85th Wettest Wettest since: 1977 1915
May–Sep 1978
5-Month
14.15"
(359.41mm)
13.72"
(348.49mm)
0.43"
(10.92mm)
77th Driest Driest since: 1976 1956
50th Wettest Wettest since: 1977 1915
Ties: 1912, 1927
Apr–Sep 1978
6-Month
16.69"
(423.93mm)
16.24"
(412.50mm)
0.45"
(11.43mm)
77th Driest Driest since: 1976 1956
50th Wettest Wettest since: 1977 1915
Ties: 2011
Mar–Sep 1978
7-Month
18.95"
(481.33mm)
18.75"
(476.25mm)
0.20"
(5.08mm)
65th Driest Driest since: 1976 1956
62nd Wettest Wettest since: 1977 1973
Ties: 1984
Feb–Sep 1978
8-Month
20.72"
(526.29mm)
20.88"
(530.35mm)
-0.16"
(-4.06mm)
57th Driest Driest since: 1976 1930
70th Wettest Wettest since: 1977 2019
Jan–Sep 1978
9-Month
23.90"
(607.06mm)
23.20"
(589.28mm)
0.70"
(17.78mm)
80th Driest Driest since: 1977 1934
47th Wettest Wettest since: 1975 2019
Dec 1977–Sep 1978
10-Month
26.62"
(676.15mm)
25.54"
(648.72mm)
1.08"
(27.43mm)
84th Driest Driest since: 1977 1931
42nd Wettest Wettest since: 1975 2019
Nov 1977–Sep 1978
11-Month
29.48"
(748.79mm)
27.77"
(705.36mm)
1.71"
(43.43mm)
99th Driest Driest since: 1977 1934
27th Wettest Wettest since: 1975 2019
Oct 1977–Sep 1978
12-Month
31.67"
(804.42mm)
29.94"
(760.48mm)
1.73"
(43.94mm)
94th Driest Driest since: 1977 1934
32nd Wettest Wettest since: 1975 2019
Apr 1977–Sep 1978
18-Month
48.43"
(1,230.12mm)
46.20"
(1,173.48mm)
2.23"
(56.64mm)
91st Driest Driest since: 1977 1931
35th Wettest Wettest since: 1975 2019
Oct 1976–Sep 1978
24-Month
59.25"
(1,504.95mm)
59.92"
(1,521.97mm)
-0.67"
(-17.02mm)
47th Driest Driest since: 1977 1918
78th Wettest Wettest since: 1976 2020
Oct 1975–Sep 1978
36-Month
87.34"
(2,218.44mm)
89.87"
(2,282.70mm)
-2.53"
(-64.26mm)
32nd Driest Driest since: 1968 1956
92nd Wettest Wettest since: 1977 2019
Oct 1974–Sep 1978
48-Month
120.29"
(3,055.37mm)
119.78"
(3,042.41mm)
0.51"
(12.96mm)
63rd Driest Driest since: 1971 1956
60th Wettest Wettest since: 1977 2019
Oct 1973–Sep 1978
60-Month
152.93"
(3,884.42mm)
149.66"
(3,801.36mm)
3.27"
(83.06mm)
81st Driest Driest since: 1972 1956
41st Wettest Wettest since: 1977 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, published February 2021, retrieved on March 8, 2021 from https://www.ncdc.noaa.gov/cag/