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 1990

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
October 1990
1-Month
2.76"
(70.10mm)
2.16"
(54.86mm)
0.60"
(15.24mm)
107th Driest
Driest since:
1952
22nd Wettest
Wettest since:
2009
Ties: 1957
Sep–Oct 1990
2-Month
4.80"
(121.92mm)
4.65"
(118.11mm)
0.15"
(3.81mm)
72nd Driest
Driest since:
1952
57th Wettest
Wettest since:
2018
Ties: 1942
Aug–Oct 1990
3-Month
7.45"
(189.23mm)
7.27"
(184.66mm)
0.18"
(4.57mm)
71st Driest
Driest since:
1952
58th Wettest
Wettest since:
2018
Jul–Oct 1990
4-Month
10.39"
(263.91mm)
10.05"
(255.27mm)
0.34"
(8.64mm)
73rd Driest
Driest since:
1952
56th Wettest
Wettest since:
1941
Ties: 1927
Jun–Oct 1990
5-Month
12.89"
(327.41mm)
12.97"
(329.44mm)
-0.08"
(-2.03mm)
53rd Driest
Driest since:
1952
76th Wettest
Wettest since:
1941
Ties: 1937
May–Oct 1990
6-Month
16.72"
(424.69mm)
15.88"
(403.35mm)
0.84"
(21.34mm)
87th Driest
Driest since:
1952
42nd Wettest
Wettest since:
1941
Apr–Oct 1990
7-Month
19.21"
(487.93mm)
18.40"
(467.36mm)
0.81"
(20.57mm)
84th Driest
Driest since:
1952
45th Wettest
Wettest since:
1941
Mar–Oct 1990
8-Month
21.92"
(556.77mm)
20.91"
(531.11mm)
1.01"
(25.66mm)
86th Driest
Driest since:
1956
43rd Wettest
Wettest since:
2019
Ties: 1989
Feb–Oct 1990
9-Month
24.60"
(624.84mm)
23.04"
(585.22mm)
1.56"
(39.62mm)
99th Driest
Driest since:
1934
30th Wettest
Wettest since:
2019
Jan–Oct 1990
10-Month
27.39"
(695.71mm)
25.36"
(644.14mm)
2.03"
(51.57mm)
109th Driest
Driest since:
1934
20th Wettest
Wettest since:
2019
Dec 1989–Oct 1990
11-Month
28.73"
(729.74mm)
27.70"
(703.58mm)
1.03"
(26.16mm)
79th Driest
Driest since:
1931
49th Wettest
Wettest since:
2019
Nov 1989–Oct 1990
12-Month
30.46"
(773.68mm)
29.93"
(760.22mm)
0.53"
(13.46mm)
71st Driest
Driest since:
1934
57th Wettest
Wettest since:
2019
Ties: 1916, 1992
May 1989–Oct 1990
18-Month
47.68"
(1,211.07mm)
45.83"
(1,164.08mm)
1.85"
(46.99mm)
88th Driest
Driest since:
1931
40th Wettest
Wettest since:
2019
Nov 1988–Oct 1990
24-Month
61.30"
(1,557.02mm)
59.90"
(1,521.46mm)
1.40"
(35.56mm)
76th Driest
Driest since:
1931
51st Wettest
Wettest since:
2019
Nov 1987–Oct 1990
36-Month
87.76"
(2,229.10mm)
89.86"
(2,282.44mm)
-2.10"
(-53.34mm)
37th Driest
Driest since:
1956
89th Wettest
Wettest since:
2019
Nov 1986–Oct 1990
48-Month
116.29"
(2,953.77mm)
119.78"
(3,042.41mm)
-3.49"
(-88.64mm)
31st Driest
Driest since:
1956
94th Wettest
Wettest since:
2019
Nov 1985–Oct 1990
60-Month
147.73"
(3,752.34mm)
149.66"
(3,801.36mm)
-1.93"
(-49.02mm)
44th Driest
Driest since:
1934
80th Wettest
Wettest since:
2019

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