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 1977

View Period (Months):All1234567891011121824364860
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Wettest/Driest
Since
Record
September 1977
1-Month
3.22"
(81.79mm)
2.49"
(63.25mm)
0.73"
(18.54mm)
119th Driest Driest since: 1976 1956
8th Wettest Wettest since: 1973 1986
Aug–Sep 1977
2-Month
6.77"
(171.96mm)
5.11"
(129.79mm)
1.66"
(42.17mm)
126th Driest Driest since: 1976 1956
1st Wettest Wettest to Date 1977
Jul–Sep 1977
3-Month
9.33"
(236.98mm)
7.88"
(200.15mm)
1.45"
(36.83mm)
123rd Driest Driest since: 1976 1930
4th Wettest Wettest since: 1915 1915
Jun–Sep 1977
4-Month
11.82"
(300.23mm)
10.81"
(274.57mm)
1.01"
(25.66mm)
106th Driest Driest since: 1976 1930
21st Wettest Wettest since: 1965 1915
May–Sep 1977
5-Month
14.49"
(368.05mm)
13.72"
(348.49mm)
0.77"
(19.56mm)
88th Driest Driest since: 1976 1956
39th Wettest Wettest since: 1975 1915
Apr–Sep 1977
6-Month
16.76"
(425.70mm)
16.24"
(412.50mm)
0.52"
(13.20mm)
78th Driest Driest since: 1976 1956
49th Wettest Wettest since: 1975 1915
Mar–Sep 1977
7-Month
19.86"
(504.44mm)
18.75"
(476.25mm)
1.11"
(28.19mm)
91st Driest Driest since: 1976 1956
36th Wettest Wettest since: 1975 1973
Feb–Sep 1977
8-Month
21.09"
(535.69mm)
20.88"
(530.35mm)
0.21"
(5.34mm)
67th Driest Driest since: 1976 1930
60th Wettest Wettest since: 1975 2019
Jan–Sep 1977
9-Month
22.67"
(575.82mm)
23.20"
(589.28mm)
-0.53"
(-13.46mm)
43rd Driest Driest since: 1976 1934
84th Wettest Wettest since: 1975 2019
Ties: 1921, 1994
Dec 1976–Sep 1977
10-Month
24.03"
(610.36mm)
25.54"
(648.72mm)
-1.51"
(-38.36mm)
26th Driest Driest since: 1976 1931
100th Wettest Wettest since: 1975 2019
Nov 1976–Sep 1977
11-Month
25.14"
(638.56mm)
27.77"
(705.36mm)
-2.63"
(-66.80mm)
15th Driest Driest since: 1963 1934
111th Wettest Wettest since: 1976 2019
Oct 1976–Sep 1977
12-Month
27.58"
(700.53mm)
29.94"
(760.48mm)
-2.36"
(-59.95mm)
19th Driest Driest since: 1966 1934
107th Wettest Wettest since: 1976 2019
Apr 1976–Sep 1977
18-Month
42.76"
(1,086.10mm)
46.20"
(1,173.48mm)
-3.44"
(-87.38mm)
16th Driest Driest since: 1963 1931
110th Wettest Wettest since: 1976 2019
Oct 1975–Sep 1977
24-Month
55.67"
(1,414.02mm)
59.92"
(1,521.97mm)
-4.25"
(-107.95mm)
15th Driest Driest since: 1967 1918
110th Wettest Wettest since: 1976 2020
Oct 1974–Sep 1977
36-Month
88.62"
(2,250.95mm)
89.87"
(2,282.70mm)
-1.25"
(-31.75mm)
45th Driest Driest since: 1968 1956
79th Wettest Wettest since: 1976 2019
Oct 1973–Sep 1977
48-Month
121.26"
(3,080.00mm)
119.78"
(3,042.41mm)
1.48"
(37.59mm)
71st Driest Driest since: 1972 1956
52nd Wettest Wettest since: 1976 2019
Ties: 1946
Oct 1972–Sep 1977
60-Month
156.41"
(3,972.81mm)
149.66"
(3,801.36mm)
6.75"
(171.45mm)
104th Driest Driest since: 1973 1956
18th Wettest Wettest since: 1976 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, published February 2021, retrieved on March 5, 2021 from https://www.ncdc.noaa.gov/cag/