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 1915

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  • Record Wettest
PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Wettest/Driest
Since
Record
September 1915
1-Month
2.77"
(70.36mm)
2.49"
(63.25mm)
0.28"
(7.11mm)
95th Driest
Driest since:
1956
34th Wettest
Wettest since:
1986
Aug–Sep 1915
2-Month
6.20"
(157.48mm)
5.11"
(129.79mm)
1.09"
(27.69mm)
122nd Driest
Driest since:
1956
7th Wettest
Wettest since:
1977
Ties: 2016
Jul–Sep 1915
3-Month
9.77"
(248.16mm)
7.88"
(200.15mm)
1.89"
(48.01mm)
128th Driest
Driest since:
1930
1st Wettest
Wettest to Date
1915
Jun–Sep 1915
4-Month
12.95"
(328.93mm)
10.81"
(274.57mm)
2.14"
(54.36mm)
128th Driest
Driest since:
1930
1st Wettest
Wettest to Date
1915
May–Sep 1915
5-Month
16.84"
(427.74mm)
13.72"
(348.49mm)
3.12"
(79.25mm)
128th Driest
Driest since:
1956
1st Wettest
Wettest to Date
1915
Apr–Sep 1915
6-Month
19.16"
(486.66mm)
16.24"
(412.50mm)
2.92"
(74.16mm)
128th Driest
Driest since:
1956
1st Wettest
Wettest to Date
1915
Mar–Sep 1915
7-Month
20.67"
(525.02mm)
18.75"
(476.25mm)
1.92"
(48.77mm)
116th Driest
Driest since:
1956
13th Wettest
Wettest since:
1973
Feb–Sep 1915
8-Month
23.44"
(595.38mm)
20.88"
(530.35mm)
2.56"
(65.03mm)
122nd Driest
Driest since:
1930
7th Wettest
Wettest since:
2019
Jan–Sep 1915
9-Month
26.19"
(665.23mm)
23.20"
(589.28mm)
2.99"
(75.95mm)
121st Driest
Driest since:
1934
8th Wettest
Wettest to Date
2019
Dec 1914–Sep 1915
10-Month
28.69"
(728.73mm)
25.54"
(648.72mm)
3.15"
(80.01mm)
121st Driest
Driest since:
1931
7th Wettest
Wettest to Date
2019
Nov 1914–Sep 1915
11-Month
30.20"
(767.08mm)
27.77"
(705.36mm)
2.43"
(61.72mm)
111th Driest
Driest since:
1934
17th Wettest
Wettest since:
2019
Oct 1914–Sep 1915
12-Month
32.71"
(830.83mm)
29.94"
(760.48mm)
2.77"
(70.35mm)
115th Driest
Driest since:
1934
13th Wettest
Wettest to Date
2019
Apr 1914–Sep 1915
18-Month
48.57"
(1,233.68mm)
46.20"
(1,173.48mm)
2.37"
(60.20mm)
95th Driest
Driest since:
1931
33rd Wettest
Wettest since:
2019
Oct 1913–Sep 1915
24-Month
62.14"
(1,578.36mm)
59.92"
(1,521.97mm)
2.22"
(56.39mm)
90th Driest
Driest since:
1918
37th Wettest
Wettest since:
2020
Oct 1912–Sep 1915
36-Month
90.59"
(2,300.99mm)
89.87"
(2,282.70mm)
0.72"
(18.29mm)
68th Driest
Driest since:
1956
58th Wettest
Wettest since:
2019
Oct 1911–Sep 1915
48-Month
122.87"
(3,120.90mm)
119.78"
(3,042.41mm)
3.09"
(78.49mm)
89th Driest
Driest since:
1956
36th Wettest
Wettest since:
2019
Oct 1910–Sep 1915
60-Month
150.33"
(3,818.38mm)
149.66"
(3,801.36mm)
0.67"
(17.02mm)
61st Driest
Driest since:
1956
63rd Wettest
Wettest since:
2020

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