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 1899

View Period (Months):
Download: CSV JSON XML
  • Record Driest
  • Bottom ⅒
  • Bottom ⅓
  • Normal
  • Top ⅓
  • Top ⅒
  • Record Wettest
PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Wettest/Driest
Since		Record
July 1899
1-Month		2.95"
(74.93mm)		2.78"
(70.61mm)		0.17"
(4.32mm)		89th Driest
Driest since:
1930
40th Wettest
Wettest since:
1950, 1958
Ties: 1982
Jun–Jul 1899
2-Month		5.92"
(150.37mm)		5.70"
(144.78mm)		0.22"
(5.59mm)		75th Driest
Driest since:
1930
54th Wettest
Wettest since:
1928
May–Jul 1899
3-Month		8.66"
(219.96mm)		8.62"
(218.95mm)		0.04"
(1.01mm)		56th Driest
Driest since:
1988
73rd Wettest
Wettest since:
2015
Ties: 1951
Apr–Jul 1899
4-Month		10.44"
(265.18mm)		11.13"
(282.70mm)		-0.69"
(-17.52mm)		34th Driest
Driest since:
1934
95th Wettest
Wettest since:
2015
Mar–Jul 1899
5-Month		13.26"
(336.80mm)		13.64"
(346.46mm)		-0.38"
(-9.66mm)		44th Driest
Driest since:
1936
85th Wettest
Wettest since:
1973
Feb–Jul 1899
6-Month		15.54"
(394.72mm)		15.78"
(400.81mm)		-0.24"
(-6.09mm)		55th Driest
Driest since:
1934
74th Wettest
Wettest since:
2019
Jan–Jul 1899
7-Month		18.15"
(461.01mm)		18.09"
(459.49mm)		0.06"
(1.52mm)		66th Driest
Driest since:
1934
63rd Wettest
Wettest since:
2019
Dec 1898–Jul 1899
8-Month		19.87"
(504.70mm)		20.44"
(519.18mm)		-0.57"
(-14.48mm)		43rd Driest
Driest to Date
1931
85th Wettest
Wettest since:
2019
Nov 1898–Jul 1899
9-Month		22.13"
(562.10mm)		22.66"
(575.56mm)		-0.53"
(-13.46mm)		45th Driest
Driest to Date
1934
83rd Wettest
Wettest since:
2019
Oct 1898–Jul 1899
10-Month		24.63"
(625.60mm)		24.83"
(630.68mm)		-0.20"
(-5.08mm)		51st Driest
Driest since:
1934
77th Wettest
Wettest since:
2019
Sep 1898–Jul 1899
11-Month		26.96"
(684.78mm)		27.33"
(694.18mm)		-0.37"
(-9.40mm)		51st Driest
Driest since:
1934
77th Wettest
Wettest since:
2019
Aug 1898–Jul 1899
12-Month		30.02"
(762.51mm)		29.95"
(760.73mm)		0.07"
(1.78mm)		56th Driest
Driest since:
1918
72nd Wettest
Wettest since:
2019
Ties: 1961
Feb 1898–Jul 1899
18-Month		45.29"
(1,150.37mm)		45.74"
(1,161.80mm)		-0.45"
(-11.43mm)		51st Driest
Driest since:
1931
77th Wettest
Wettest since:
2019
Aug 1897–Jul 1899
24-Month		58.27"
(1,480.06mm)		59.92"
(1,521.97mm)		-1.65"
(-41.91mm)		39th Driest
Driest to Date
1918
88th Wettest
Wettest since:
2020
Aug 1896–Jul 1899
36-Month		88.92"
(2,258.57mm)		89.88"
(2,282.95mm)		-0.96"
(-24.38mm)		49th Driest
Driest since:
1956
77th Wettest
Wettest to Date
2019
Aug 1895–Jul 1899
48-Month		117.20"
(2,976.88mm)		119.78"
(3,042.41mm)		-2.58"
(-65.53mm)		35th Driest
Driest to Date
1956
90th Wettest
Wettest to Date
2019

Citing This Page