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 1973

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  • Record Wettest
PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Wettest/Driest
Since
Record
September 1973
1-Month
3.46"
(87.88mm)
2.49"
(63.25mm)
0.97"
(24.63mm)
125th Driest
Driest since:
1956
4th Wettest
Wettest since:
1986
Aug–Sep 1973
2-Month
5.52"
(140.21mm)
5.11"
(129.79mm)
0.41"
(10.42mm)
98th Driest
Driest since:
1956
31st Wettest
Wettest since:
1977
Jul–Sep 1973
3-Month
8.48"
(215.39mm)
7.88"
(200.15mm)
0.60"
(15.24mm)
98th Driest
Driest since:
1930
31st Wettest
Wettest since:
1915
Jun–Sep 1973
4-Month
11.53"
(292.86mm)
10.81"
(274.57mm)
0.72"
(18.29mm)
100th Driest
Driest since:
1930
29th Wettest
Wettest since:
1915
Ties: 2008
May–Sep 1973
5-Month
14.56"
(369.82mm)
13.72"
(348.49mm)
0.84"
(21.33mm)
92nd Driest
Driest since:
1956
37th Wettest
Wettest since:
1915
Ties: 1992
Apr–Sep 1973
6-Month
17.89"
(454.41mm)
16.24"
(412.50mm)
1.65"
(41.91mm)
115th Driest
Driest since:
1956
14th Wettest
Wettest since:
1915
Mar–Sep 1973
7-Month
21.89"
(556.01mm)
18.75"
(476.25mm)
3.14"
(79.76mm)
128th Driest
Driest since:
1956
1st Wettest
Wettest to Date
1973
Feb–Sep 1973
8-Month
23.85"
(605.79mm)
20.88"
(530.35mm)
2.97"
(75.44mm)
126th Driest
Driest since:
1930
3rd Wettest
Wettest since:
2019
Jan–Sep 1973
9-Month
26.33"
(668.78mm)
23.20"
(589.28mm)
3.13"
(79.50mm)
123rd Driest
Driest since:
1934
6th Wettest
Wettest to Date
2019
Dec 1972–Sep 1973
10-Month
29.35"
(745.49mm)
25.54"
(648.72mm)
3.81"
(96.77mm)
126th Driest
Driest since:
1931
2nd Wettest
Wettest to Date
2019
Nov 1972–Sep 1973
11-Month
32.40"
(822.96mm)
27.77"
(705.36mm)
4.63"
(117.60mm)
125th Driest
Driest since:
1934
3rd Wettest
Wettest to Date
2019
Oct 1972–Sep 1973
12-Month
35.15"
(892.81mm)
29.94"
(760.48mm)
5.21"
(132.33mm)
126th Driest
Driest since:
1934
2nd Wettest
Wettest to Date
2019
Apr 1972–Sep 1973
18-Month
51.77"
(1,314.96mm)
46.20"
(1,173.48mm)
5.57"
(141.48mm)
124th Driest
Driest since:
1931
4th Wettest
Wettest since:
2019
Oct 1971–Sep 1973
24-Month
65.99"
(1,676.15mm)
59.92"
(1,521.97mm)
6.07"
(154.18mm)
118th Driest
Driest since:
1918
9th Wettest
Wettest to Date
2020
Oct 1970–Sep 1973
36-Month
95.66"
(2,429.76mm)
89.87"
(2,282.70mm)
5.79"
(147.06mm)
110th Driest
Driest since:
1956
16th Wettest
Wettest to Date
2019
Oct 1969–Sep 1973
48-Month
125.29"
(3,182.37mm)
119.78"
(3,042.41mm)
5.51"
(139.96mm)
102nd Driest
Driest since:
1956
23rd Wettest
Wettest since:
2019
Oct 1968–Sep 1973
60-Month
156.40"
(3,972.56mm)
149.66"
(3,801.36mm)
6.74"
(171.20mm)
103rd Driest
Driest since:
1956
21st Wettest
Wettest to Date
2020

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