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 1970

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
October 1970
1-Month
2.88"
(73.15mm)
2.16"
(54.86mm)
0.72"
(18.29mm)
111th Driest
Driest since:
1952
18th Wettest
Wettest since:
2009
Sep–Oct 1970
2-Month
5.94"
(150.88mm)
4.65"
(118.11mm)
1.29"
(32.77mm)
121st Driest
Driest since:
1952
8th Wettest
Wettest since:
2018
Aug–Oct 1970
3-Month
8.31"
(211.07mm)
7.27"
(184.66mm)
1.04"
(26.41mm)
113th Driest
Driest since:
1952
16th Wettest
Wettest since:
2018
Ties: 1971
Jul–Oct 1970
4-Month
10.72"
(272.29mm)
10.05"
(255.27mm)
0.67"
(17.02mm)
91st Driest
Driest since:
1952
38th Wettest
Wettest since:
1941
Jun–Oct 1970
5-Month
13.49"
(342.65mm)
12.97"
(329.44mm)
0.52"
(13.21mm)
74th Driest
Driest since:
1952
55th Wettest
Wettest since:
1941
Ties: 1925
May–Oct 1970
6-Month
16.10"
(408.94mm)
15.88"
(403.35mm)
0.22"
(5.59mm)
66th Driest
Driest since:
1952
63rd Wettest
Wettest since:
1941
Ties: 1935
Apr–Oct 1970
7-Month
18.88"
(479.55mm)
18.40"
(467.36mm)
0.48"
(12.19mm)
73rd Driest
Driest since:
1952
56th Wettest
Wettest since:
1941
Mar–Oct 1970
8-Month
21.56"
(547.62mm)
20.91"
(531.11mm)
0.65"
(16.51mm)
77th Driest
Driest since:
1956
52nd Wettest
Wettest since:
2019
Feb–Oct 1970
9-Month
23.19"
(589.03mm)
23.04"
(585.22mm)
0.15"
(3.81mm)
63rd Driest
Driest since:
1934
66th Wettest
Wettest since:
2019
Jan–Oct 1970
10-Month
25.28"
(642.11mm)
25.36"
(644.14mm)
-0.08"
(-2.03mm)
56th Driest
Driest since:
1934
73rd Wettest
Wettest since:
2019
Dec 1969–Oct 1970
11-Month
28.22"
(716.79mm)
27.70"
(703.58mm)
0.52"
(13.21mm)
72nd Driest
Driest since:
1931
56th Wettest
Wettest since:
2019
Nov 1969–Oct 1970
12-Month
29.81"
(757.17mm)
29.93"
(760.22mm)
-0.12"
(-3.05mm)
55th Driest
Driest since:
1934
73rd Wettest
Wettest since:
2019
May 1969–Oct 1970
18-Month
46.18"
(1,172.97mm)
45.83"
(1,164.08mm)
0.35"
(8.89mm)
63rd Driest
Driest since:
1931
65th Wettest
Wettest since:
2019
Nov 1968–Oct 1970
24-Month
61.55"
(1,563.37mm)
59.90"
(1,521.46mm)
1.65"
(41.91mm)
83rd Driest
Driest since:
1931
44th Wettest
Wettest since:
2019
Nov 1967–Oct 1970
36-Month
90.97"
(2,310.64mm)
89.86"
(2,282.44mm)
1.11"
(28.20mm)
73rd Driest
Driest since:
1956
53rd Wettest
Wettest since:
2019
Nov 1966–Oct 1970
48-Month
120.45"
(3,059.43mm)
119.78"
(3,042.41mm)
0.67"
(17.02mm)
62nd Driest
Driest since:
1956
63rd Wettest
Wettest since:
2019
Nov 1965–Oct 1970
60-Month
147.52"
(3,747.01mm)
149.66"
(3,801.36mm)
-2.14"
(-54.35mm)
40th Driest
Driest since:
1934
84th Wettest
Wettest since:
2019

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