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 1999

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  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
July 1999
1-Month		2.58"
(65.53mm)		2.78"
(70.61mm)		-0.20"
(-5.08mm)		30th Driest
Driest since:
1930
99th Wettest
Wettest since:
1950, 1958
Jun–Jul 1999
2-Month		5.89"
(149.61mm)		5.70"
(144.78mm)		0.19"
(4.83mm)		74th Driest
Driest since:
1930
55th Wettest
Wettest since:
1928
Ties: 1968
May–Jul 1999
3-Month		8.80"
(223.52mm)		8.62"
(218.95mm)		0.18"
(4.57mm)		66th Driest
Driest since:
1988
63rd Wettest
Wettest since:
2015
Ties: 1998, 2008
Apr–Jul 1999
4-Month		11.67"
(296.42mm)		11.13"
(282.70mm)		0.54"
(13.72mm)		83rd Driest
Driest since:
1934
46th Wettest
Wettest since:
2015
Mar–Jul 1999
5-Month		13.86"
(352.04mm)		13.64"
(346.46mm)		0.22"
(5.58mm)		68th Driest
Driest since:
1936
61st Wettest
Wettest since:
1973
Ties: 1903, 2008
Feb–Jul 1999
6-Month		15.78"
(400.81mm)		15.78"
(400.81mm)		0.00"
(0.00mm)		61st Driest
Driest since:
1934
68th Wettest
Wettest since:
2019
Ties: 1969
Jan–Jul 1999
7-Month		18.91"
(480.31mm)		18.09"
(459.49mm)		0.82"
(20.82mm)		91st Driest
Driest since:
1934
38th Wettest
Wettest since:
2019
Ties: 1907
Dec 1998–Jul 1999
8-Month		20.99"
(533.15mm)		20.44"
(519.18mm)		0.55"
(13.97mm)		75th Driest
Driest since:
1931
53rd Wettest
Wettest since:
2019
Nov 1998–Jul 1999
9-Month		23.62"
(599.95mm)		22.66"
(575.56mm)		0.96"
(24.39mm)		85th Driest
Driest since:
1934
43rd Wettest
Wettest since:
2019
Oct 1998–Jul 1999
10-Month		26.59"
(675.39mm)		24.83"
(630.68mm)		1.76"
(44.71mm)		101st Driest
Driest since:
1934
27th Wettest
Wettest since:
2019
Sep 1998–Jul 1999
11-Month		29.10"
(739.14mm)		27.33"
(694.18mm)		1.77"
(44.96mm)		98th Driest
Driest since:
1934
30th Wettest
Wettest since:
2019
Aug 1998–Jul 1999
12-Month		31.52"
(800.61mm)		29.95"
(760.73mm)		1.57"
(39.88mm)		94th Driest
Driest since:
1918
34th Wettest
Wettest since:
2019
Feb 1998–Jul 1999
18-Month		49.44"
(1,255.78mm)		45.74"
(1,161.80mm)		3.70"
(93.98mm)		112th Driest
Driest since:
1931
16th Wettest
Wettest since:
2019
Aug 1997–Jul 1999
24-Month		65.14"
(1,654.56mm)		59.92"
(1,521.97mm)		5.22"
(132.59mm)		114th Driest
Driest since:
1918
13th Wettest
Wettest since:
2020
Aug 1996–Jul 1999
36-Month		99.54"
(2,528.32mm)		89.88"
(2,282.95mm)		9.66"
(245.37mm)		121st Driest
Driest since:
1956
5th Wettest
Wettest since:
2019
Aug 1995–Jul 1999
48-Month		130.47"
(3,313.94mm)		119.78"
(3,042.41mm)		10.69"
(271.53mm)		120th Driest
Driest since:
1956
5th Wettest
Wettest since:
2019
Aug 1994–Jul 1999
60-Month		163.68"
(4,157.47mm)		149.64"
(3,800.86mm)		14.04"
(356.61mm)		121st Driest
Driest since:
1934
3rd Wettest
Wettest to Date
2019

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