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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