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, July 1955

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
July 1955
1-Month 		2.92"
(74.17mm)		 2.78"
(70.61mm)		 0.14"
(3.56mm)		 81st Driest
Driest since:
 1930
48th Wettest
Wettest since:
 1950, 1958
Ties: 2016
Jun–Jul 1955
2-Month 		5.39"
(136.91mm)		 5.70"
(144.78mm)		 -0.31"
(-7.87mm)		 36th Driest
Driest since:
 1930
93rd Wettest
Wettest since:
 1928
May–Jul 1955
3-Month 		8.31"
(211.07mm)		 8.62"
(218.95mm)		 -0.31"
(-7.88mm)		 37th Driest
Driest since:
 1988
92nd Wettest
Wettest since:
 2015
Ties: 1921, 2022
Apr–Jul 1955
4-Month 		10.80"
(274.32mm)		 11.13"
(282.70mm)		 -0.33"
(-8.38mm)		 43rd Driest
Driest since:
 1934
86th Wettest
Wettest since:
 2015
Mar–Jul 1955
5-Month 		12.78"
(324.61mm)		 13.64"
(346.46mm)		 -0.86"
(-21.85mm)		 29th Driest
Driest since:
 1936
100th Wettest
Wettest since:
 1973
Feb–Jul 1955
6-Month 		15.00"
(381.00mm)		 15.78"
(400.81mm)		 -0.78"
(-19.81mm)		 33rd Driest
Driest since:
 1934
96th Wettest
Wettest since:
 2019
Jan–Jul 1955
7-Month 		16.69"
(423.93mm)		 18.09"
(459.49mm)		 -1.40"
(-35.56mm)		 23rd Driest
Driest since:
 1934
106th Wettest
Wettest since:
 2019
Dec 1954–Jul 1955
8-Month 		18.69"
(474.73mm)		 20.44"
(519.18mm)		 -1.75"
(-44.45mm)		 22nd Driest
Driest since:
 1931
106th Wettest
Wettest since:
 2019
Nov 1954–Jul 1955
9-Month 		20.23"
(513.84mm)		 22.66"
(575.56mm)		 -2.43"
(-61.72mm)		 13th Driest
Driest since:
 1934
115th Wettest
Wettest since:
 2019
Oct 1954–Jul 1955
10-Month 		22.58"
(573.53mm)		 24.83"
(630.68mm)		 -2.25"
(-57.15mm)		 19th Driest
Driest since:
 1934
109th Wettest
Wettest since:
 2019
Sep 1954–Jul 1955
11-Month 		24.53"
(623.06mm)		 27.33"
(694.18mm)		 -2.80"
(-71.12mm)		 13th Driest
Driest since:
 1934
115th Wettest
Wettest since:
 2019
Aug 1954–Jul 1955
12-Month 		27.05"
(687.07mm)		 29.95"
(760.73mm)		 -2.90"
(-73.66mm)		 15th Driest
Driest since:
 1918
113th Wettest
Wettest since:
 2019
Ties: 1917
Feb 1954–Jul 1955
18-Month 		40.30"
(1,023.62mm)		 45.74"
(1,161.80mm)		 -5.44"
(-138.18mm)		 6th Driest
Driest since:
 1931
122nd Wettest
Wettest since:
 2019
Aug 1953–Jul 1955
24-Month 		52.43"
(1,331.72mm)		 59.92"
(1,521.97mm)		 -7.49"
(-190.25mm)		 3rd Driest
Driest since:
 1918
124th Wettest
Wettest since:
 2020
Aug 1952–Jul 1955
36-Month 		80.44"
(2,043.18mm)		 89.88"
(2,282.95mm)		 -9.44"
(-239.77mm)		 2nd Driest
Driest to Date
 1956
124th Wettest
Wettest since:
 2019
Aug 1951–Jul 1955
48-Month 		110.52"
(2,807.21mm)		 119.78"
(3,042.41mm)		 -9.26"
(-235.20mm)		 4th Driest
Driest since:
 1956
121st Wettest
Wettest since:
 2019
Aug 1950–Jul 1955
60-Month 		139.91"
(3,553.71mm)		 149.64"
(3,800.86mm)		 -9.73"
(-247.15mm)		 4th Driest
Driest since:
 1934
120th Wettest
Wettest since:
 2019

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