National Rankings

National Data Info
Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Precipitation Rankings, September 1974

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
September 1974
1-Month
2.72"
(69.09mm)
2.49"
(63.25mm)
0.23"
(5.84mm)
89th Driest
Driest since:
1956
40th Wettest
Wettest since:
1986
Ties: 2002
Aug–Sep 1974
2-Month
6.15"
(156.21mm)
5.11"
(129.79mm)
1.04"
(26.42mm)
120th Driest
Driest since:
1956
9th Wettest
Wettest since:
1977
Jul–Sep 1974
3-Month
8.29"
(210.57mm)
7.88"
(200.15mm)
0.41"
(10.42mm)
89th Driest
Driest since:
1930
40th Wettest
Wettest since:
1915
Jun–Sep 1974
4-Month
10.93"
(277.62mm)
10.81"
(274.57mm)
0.12"
(3.05mm)
66th Driest
Driest since:
1930
63rd Wettest
Wettest since:
1915
Ties: 1921
May–Sep 1974
5-Month
14.00"
(355.60mm)
13.72"
(348.49mm)
0.28"
(7.11mm)
69th Driest
Driest since:
1956
60th Wettest
Wettest since:
1915
Apr–Sep 1974
6-Month
16.55"
(420.37mm)
16.24"
(412.50mm)
0.31"
(7.87mm)
72nd Driest
Driest since:
1956
57th Wettest
Wettest since:
1915
Mar–Sep 1974
7-Month
19.18"
(487.17mm)
18.75"
(476.25mm)
0.43"
(10.92mm)
76th Driest
Driest since:
1956
53rd Wettest
Wettest since:
1973
Feb–Sep 1974
8-Month
20.86"
(529.84mm)
20.88"
(530.35mm)
-0.02"
(-0.51mm)
61st Driest
Driest since:
1930
68th Wettest
Wettest since:
2019
Jan–Sep 1974
9-Month
24.01"
(609.85mm)
23.20"
(589.28mm)
0.81"
(20.57mm)
84th Driest
Driest since:
1934
45th Wettest
Wettest since:
2019
Dec 1973–Sep 1974
10-Month
27.10"
(688.34mm)
25.54"
(648.72mm)
1.56"
(39.62mm)
96th Driest
Driest since:
1931
32nd Wettest
Wettest since:
2019
Nov 1973–Sep 1974
11-Month
30.27"
(768.86mm)
27.77"
(705.36mm)
2.50"
(63.50mm)
114th Driest
Driest since:
1934
14th Wettest
Wettest since:
2019
Oct 1973–Sep 1974
12-Month
32.64"
(829.06mm)
29.94"
(760.48mm)
2.70"
(68.58mm)
114th Driest
Driest since:
1934
14th Wettest
Wettest since:
2019
Apr 1973–Sep 1974
18-Month
50.53"
(1,283.46mm)
46.20"
(1,173.48mm)
4.33"
(109.98mm)
116th Driest
Driest since:
1931
12th Wettest
Wettest since:
2019
Oct 1972–Sep 1974
24-Month
67.79"
(1,721.87mm)
59.92"
(1,521.97mm)
7.87"
(199.90mm)
124th Driest
Driest since:
1918
3rd Wettest
Wettest to Date
2020
Oct 1971–Sep 1974
36-Month
98.63"
(2,505.20mm)
89.87"
(2,282.70mm)
8.76"
(222.50mm)
118th Driest
Driest since:
1956
8th Wettest
Wettest to Date
2019
Oct 1970–Sep 1974
48-Month
128.30"
(3,258.82mm)
119.78"
(3,042.41mm)
8.52"
(216.41mm)
112th Driest
Driest since:
1956
13th Wettest
Wettest to Date
2019
Oct 1969–Sep 1974
60-Month
157.93"
(4,011.42mm)
149.66"
(3,801.36mm)
8.27"
(210.06mm)
109th Driest
Driest since:
1956
15th Wettest
Wettest to Date
2020

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