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, September 2002

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
September 2002
1-Month
2.72"
(69.09mm)
2.49"
(63.25mm)
0.23"
(5.84mm)
89th Driest
Driest since:
1956
40th Wettest
Wettest since:
1986
Ties: 1974
Aug–Sep 2002
2-Month
5.12"
(130.05mm)
5.11"
(129.79mm)
0.01"
(0.26mm)
63rd Driest
Driest since:
1956
66th Wettest
Wettest since:
1977
Jul–Sep 2002
3-Month
7.72"
(196.09mm)
7.88"
(200.15mm)
-0.16"
(-4.06mm)
46th Driest
Driest since:
1930
83rd Wettest
Wettest since:
1915
Ties: 1908, 1909, 1960
Jun–Sep 2002
4-Month
10.28"
(261.11mm)
10.81"
(274.57mm)
-0.53"
(-13.46mm)
34th Driest
Driest since:
1930
95th Wettest
Wettest since:
1915
Ties: 1937
May–Sep 2002
5-Month
12.92"
(328.17mm)
13.72"
(348.49mm)
-0.80"
(-20.32mm)
30th Driest
Driest since:
1956
99th Wettest
Wettest since:
1915
Apr–Sep 2002
6-Month
15.18"
(385.57mm)
16.24"
(412.50mm)
-1.06"
(-26.93mm)
24th Driest
Driest since:
1956
105th Wettest
Wettest since:
1915
Ties: 1976
Mar–Sep 2002
7-Month
17.77"
(451.36mm)
18.75"
(476.25mm)
-0.98"
(-24.89mm)
29th Driest
Driest since:
1956
100th Wettest
Wettest since:
1973
Feb–Sep 2002
8-Month
19.09"
(484.89mm)
20.88"
(530.35mm)
-1.79"
(-45.46mm)
17th Driest
Driest since:
1930
112th Wettest
Wettest since:
2019
Jan–Sep 2002
9-Month
21.10"
(535.94mm)
23.20"
(589.28mm)
-2.10"
(-53.34mm)
12th Driest
Driest since:
1934
117th Wettest
Wettest since:
2019
Ties: 2012
Dec 2001–Sep 2002
10-Month
23.46"
(595.88mm)
25.54"
(648.72mm)
-2.08"
(-52.84mm)
15th Driest
Driest since:
1931
113th Wettest
Wettest since:
2019
Nov 2001–Sep 2002
11-Month
25.85"
(656.59mm)
27.77"
(705.36mm)
-1.92"
(-48.77mm)
25th Driest
Driest since:
1934
103rd Wettest
Wettest since:
2019
Oct 2001–Sep 2002
12-Month
27.91"
(708.91mm)
29.94"
(760.48mm)
-2.03"
(-51.57mm)
22nd Driest
Driest since:
1934
106th Wettest
Wettest since:
2019
Apr 2001–Sep 2002
18-Month
43.49"
(1,104.65mm)
46.20"
(1,173.48mm)
-2.71"
(-68.83mm)
21st Driest
Driest since:
1931
107th Wettest
Wettest since:
2019
Oct 2000–Sep 2002
24-Month
56.82"
(1,443.23mm)
59.92"
(1,521.97mm)
-3.10"
(-78.74mm)
25th Driest
Driest since:
1918
102nd Wettest
Wettest since:
2020
Oct 1999–Sep 2002
36-Month
83.08"
(2,110.23mm)
89.87"
(2,282.70mm)
-6.79"
(-172.47mm)
8th Driest
Driest since:
1956
118th Wettest
Wettest since:
2019
Oct 1998–Sep 2002
48-Month
114.49"
(2,908.05mm)
119.78"
(3,042.41mm)
-5.29"
(-134.36mm)
14th Driest
Driest since:
1956
111th Wettest
Wettest since:
2019
Oct 1997–Sep 2002
60-Month
147.82"
(3,754.63mm)
149.66"
(3,801.36mm)
-1.84"
(-46.73mm)
44th Driest
Driest since:
1956
80th Wettest
Wettest since:
2020

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