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


Contiguous U.S.

Precipitation Rankings, September 1940

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 1940
1-Month
2.00"
(50.80mm)
2.49"
(63.25mm)
-0.49"
(-12.45mm)
16th Driest Driest since: 1939 1956
111th Wettest Wettest since: 1938 1986
Ties: 1937
Aug–Sep 1940
2-Month
4.97"
(126.24mm)
5.11"
(129.79mm)
-0.14"
(-3.55mm)
51st Driest Driest since: 1939 1956
76th Wettest Wettest since: 1936 1977
Jul–Sep 1940
3-Month
7.47"
(189.74mm)
7.88"
(200.15mm)
-0.41"
(-10.41mm)
30th Driest Driest since: 1939 1930
97th Wettest Wettest since: 1938 1915
Jun–Sep 1940
4-Month
10.45"
(265.43mm)
10.81"
(274.57mm)
-0.36"
(-9.14mm)
39th Driest Driest since: 1939 1930
88th Wettest Wettest since: 1938 1915
May–Sep 1940
5-Month
12.67"
(321.82mm)
13.72"
(348.49mm)
-1.05"
(-26.67mm)
23rd Driest Driest since: 1939 1956
104th Wettest Wettest since: 1938 1915
Apr–Sep 1940
6-Month
15.71"
(399.03mm)
16.24"
(412.50mm)
-0.53"
(-13.47mm)
40th Driest Driest since: 1939 1956
87th Wettest Wettest since: 1938 1915
Mar–Sep 1940
7-Month
17.98"
(456.69mm)
18.75"
(476.25mm)
-0.77"
(-19.56mm)
38th Driest Driest since: 1939 1956
89th Wettest Wettest since: 1938 1973
Feb–Sep 1940
8-Month
20.96"
(532.38mm)
20.88"
(530.35mm)
0.08"
(2.03mm)
62nd Driest Driest since: 1939 1930
65th Wettest Wettest since: 1938 2019
Jan–Sep 1940
9-Month
22.89"
(581.41mm)
23.20"
(589.28mm)
-0.31"
(-7.87mm)
50th Driest Driest since: 1939 1934
77th Wettest Wettest since: 1938 2019
Dec 1939–Sep 1940
10-Month
24.77"
(629.16mm)
25.54"
(648.72mm)
-0.77"
(-19.56mm)
43rd Driest Driest since: 1939 1931
83rd Wettest Wettest since: 1938 2019
Nov 1939–Sep 1940
11-Month
25.76"
(654.30mm)
27.77"
(705.36mm)
-2.01"
(-51.06mm)
20th Driest Driest since: 1939 1934
106th Wettest Wettest since: 1938 2019
Oct 1939–Sep 1940
12-Month
27.36"
(694.94mm)
29.94"
(760.48mm)
-2.58"
(-65.54mm)
16th Driest Driest since: 1939 1934
110th Wettest Wettest since: 1938 2019
Apr 1939–Sep 1940
18-Month
41.73"
(1,059.94mm)
46.20"
(1,173.48mm)
-4.47"
(-113.54mm)
10th Driest Driest since: 1934 1931
116th Wettest Wettest since: 1939 2019
Oct 1938–Sep 1940
24-Month
54.24"
(1,377.70mm)
59.92"
(1,521.97mm)
-5.68"
(-144.27mm)
9th Driest Driest since: 1934 1918
116th Wettest Wettest since: 1939 2020
Oct 1937–Sep 1940
36-Month
86.16"
(2,188.46mm)
89.87"
(2,282.70mm)
-3.71"
(-94.24mm)
22nd Driest Driest since: 1936 1956
102nd Wettest Wettest since: 1939 2019
Oct 1936–Sep 1940
48-Month
115.48"
(2,933.19mm)
119.78"
(3,042.41mm)
-4.30"
(-109.22mm)
23rd Driest Driest since: 1939 1956
100th Wettest Wettest since: 1938 2019
Oct 1935–Sep 1940
60-Month
142.18"
(3,611.37mm)
149.66"
(3,801.36mm)
-7.48"
(-189.99mm)
9th Driest Driest since: 1937 1956
113th Wettest Wettest since: 1939 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: National Time Series, published June 2021, retrieved on June 25, 2021 from https://www.ncdc.noaa.gov/cag/