Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Wyoming

Precipitation Rankings, September 1998

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  • Record Wettest
PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Wettest/Driest
Since
Record
September 1998
1-Month
1.34"
(34.04mm)
1.24"
(31.50mm)
0.10"
(2.54mm)
81st Driest
Driest since:
1979
48th Wettest
Wettest since:
1923
Aug–Sep 1998
2-Month
2.71"
(68.83mm)
2.31"
(58.67mm)
0.40"
(10.16mm)
91st Driest
Driest since:
2012
38th Wettest
Wettest since:
1923
Jul–Sep 1998
3-Month
4.45"
(113.03mm)
3.59"
(91.19mm)
0.86"
(21.84mm)
104th Driest
Driest since:
1964
25th Wettest
Wettest since:
1923
Jun–Sep 1998
4-Month
7.78"
(197.61mm)
5.43"
(137.92mm)
2.35"
(59.69mm)
122nd Driest
Driest since:
2012
7th Wettest
Wettest since:
1923
May–Sep 1998
5-Month
9.22"
(234.19mm)
7.64"
(194.06mm)
1.58"
(40.13mm)
106th Driest
Driest since:
1919
23rd Wettest
Wettest since:
1915
Apr–Sep 1998
6-Month
10.58"
(268.73mm)
9.42"
(239.27mm)
1.16"
(29.46mm)
97th Driest
Driest since:
2012
32nd Wettest
Wettest since:
1941
Mar–Sep 1998
7-Month
12.40"
(314.96mm)
10.67"
(271.02mm)
1.73"
(43.94mm)
106th Driest
Driest since:
2012
23rd Wettest
Wettest since:
1941
Feb–Sep 1998
8-Month
13.30"
(337.82mm)
11.63"
(295.40mm)
1.67"
(42.42mm)
101st Driest
Driest since:
2012
28th Wettest
Wettest since:
1945
Jan–Sep 1998
9-Month
14.71"
(373.63mm)
12.70"
(322.58mm)
2.01"
(51.05mm)
106th Driest
Driest since:
1919
23rd Wettest
Wettest since:
1915, 1945
Dec 1997–Sep 1998
10-Month
15.60"
(396.24mm)
13.71"
(348.23mm)
1.89"
(48.01mm)
102nd Driest
Driest since:
1919
26th Wettest
Wettest since:
1923
Nov 1997–Sep 1998
11-Month
16.15"
(410.21mm)
14.74"
(374.40mm)
1.41"
(35.81mm)
91st Driest
Driest since:
1919
37th Wettest
Wettest since:
1923
Oct 1997–Sep 1998
12-Month
17.53"
(445.26mm)
15.94"
(404.88mm)
1.59"
(40.38mm)
95th Driest
Driest since:
1919
33rd Wettest
Wettest since:
1995
Apr 1997–Sep 1998
18-Month
29.35"
(745.49mm)
25.35"
(643.89mm)
4.00"
(101.60mm)
116th Driest
Driest since:
2021
12th Wettest
Wettest since:
1945
Oct 1996–Sep 1998
24-Month
37.79"
(959.87mm)
31.88"
(809.75mm)
5.91"
(150.12mm)
126th Driest
Driest since:
2002
1st Wettest
Wettest to Date
1998
Oct 1995–Sep 1998
36-Month
53.88"
(1,368.55mm)
47.81"
(1,214.37mm)
6.07"
(154.18mm)
116th Driest
Driest since:
2002
10th Wettest
Wettest since:
1997
Ties: 1973
Oct 1994–Sep 1998
48-Month
75.23"
(1,910.84mm)
63.72"
(1,618.49mm)
11.51"
(292.35mm)
124th Driest
Driest since:
2003
1st Wettest
Wettest to Date
1998
Oct 1993–Sep 1998
60-Month
87.53"
(2,223.26mm)
79.56"
(2,020.82mm)
7.97"
(202.44mm)
113th Driest
Driest since:
2004
11th Wettest
Wettest since:
1999

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