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, October 1909

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
October 1909
1-Month 		1.54"
(39.12mm)		 2.16"
(54.86mm)		 -0.62"
(-15.74mm)		 17th Driest
Driest since:
 1952
112th Wettest
Wettest since:
 2009
Ties: 1948
Sep–Oct 1909
2-Month 		3.82"
(97.03mm)		 4.65"
(118.11mm)		 -0.83"
(-21.08mm)		 18th Driest
Driest since:
 1952
111th Wettest
Wettest since:
 2018
Aug–Oct 1909
3-Month 		6.23"
(158.24mm)		 7.27"
(184.66mm)		 -1.04"
(-26.42mm)		 15th Driest
Driest since:
 1952
114th Wettest
Wettest since:
 2018
Jul–Oct 1909
4-Month 		9.26"
(235.20mm)		 10.05"
(255.27mm)		 -0.79"
(-20.07mm)		 28th Driest
Driest since:
 1952
101st Wettest
Wettest since:
 1941
Jun–Oct 1909
5-Month 		12.49"
(317.25mm)		 12.97"
(329.44mm)		 -0.48"
(-12.19mm)		 43rd Driest
Driest since:
 1952
86th Wettest
Wettest since:
 1941
May–Oct 1909
6-Month 		15.53"
(394.46mm)		 15.88"
(403.35mm)		 -0.35"
(-8.89mm)		 45th Driest
Driest since:
 1952
84th Wettest
Wettest since:
 1941
Apr–Oct 1909
7-Month 		17.81"
(452.37mm)		 18.40"
(467.36mm)		 -0.59"
(-14.99mm)		 42nd Driest
Driest since:
 1952
87th Wettest
Wettest since:
 1941
Mar–Oct 1909
8-Month 		20.02"
(508.51mm)		 20.91"
(531.11mm)		 -0.89"
(-22.60mm)		 31st Driest
Driest since:
 1956
98th Wettest
Wettest since:
 2019
Ties: 1932
Feb–Oct 1909
9-Month 		22.90"
(581.66mm)		 23.04"
(585.22mm)		 -0.14"
(-3.56mm)		 55th Driest
Driest since:
 1934
74th Wettest
Wettest since:
 2019
Jan–Oct 1909
10-Month 		25.64"
(651.26mm)		 25.36"
(644.14mm)		 0.28"
(7.12mm)		 69th Driest
Driest since:
 1934
60th Wettest
Wettest since:
 2019
Ties: 1965
Dec 1908–Oct 1909
11-Month 		27.37"
(695.20mm)		 27.70"
(703.58mm)		 -0.33"
(-8.38mm)		 48th Driest
Driest since:
 1931
80th Wettest
Wettest since:
 2019
Nov 1908–Oct 1909
12-Month 		29.04"
(737.62mm)		 29.93"
(760.22mm)		 -0.89"
(-22.60mm)		 39th Driest
Driest since:
 1934
89th Wettest
Wettest since:
 2019
May 1908–Oct 1909
18-Month 		45.94"
(1,166.88mm)		 45.83"
(1,164.08mm)		 0.11"
(2.80mm)		 61st Driest
Driest since:
 1931
67th Wettest
Wettest since:
 2019
Nov 1907–Oct 1909
24-Month 		60.38"
(1,533.65mm)		 59.90"
(1,521.46mm)		 0.48"
(12.19mm)		 67th Driest
Driest since:
 1931
60th Wettest
Wettest since:
 2019
Ties: 1972
Nov 1906–Oct 1909
36-Month 		91.75"
(2,330.45mm)		 89.86"
(2,282.44mm)		 1.89"
(48.01mm)		 80th Driest
Driest since:
 1956
46th Wettest
Wettest since:
 2019
Nov 1905–Oct 1909
48-Month 		123.71"
(3,142.23mm)		 119.78"
(3,042.41mm)		 3.93"
(99.82mm)		 98th Driest
Driest since:
 1956
27th Wettest
Wettest since:
 2019
Nov 1904–Oct 1909
60-Month 		155.00"
(3,937.00mm)		 149.66"
(3,801.36mm)		 5.34"
(135.64mm)		 96th Driest
Driest since:
 1934
28th Wettest
Wettest to Date
 2019

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