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 1990

View Period (Months):
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
September 1990
1-Month
1.05"
(26.67mm)
1.24"
(31.50mm)
-0.19"
(-4.83mm)
59th Driest
Driest since:
1979
70th Wettest
Wettest since:
1923
Ties: 1939, 1983
Aug–Sep 1990
2-Month
2.17"
(55.12mm)
2.31"
(58.67mm)
-0.14"
(-3.55mm)
63rd Driest
Driest since:
2012
66th Wettest
Wettest since:
1923
Ties: 1936
Jul–Sep 1990
3-Month
4.07"
(103.38mm)
3.59"
(91.19mm)
0.48"
(12.19mm)
95th Driest
Driest since:
1964
34th Wettest
Wettest since:
1923
Jun–Sep 1990
4-Month
5.26"
(133.60mm)
5.43"
(137.92mm)
-0.17"
(-4.32mm)
65th Driest
Driest since:
2012
64th Wettest
Wettest since:
1923
May–Sep 1990
5-Month
7.03"
(178.56mm)
7.64"
(194.06mm)
-0.61"
(-15.50mm)
49th Driest
Driest since:
1919
80th Wettest
Wettest since:
1915
Apr–Sep 1990
6-Month
9.08"
(230.63mm)
9.42"
(239.27mm)
-0.34"
(-8.64mm)
57th Driest
Driest since:
2012
72nd Wettest
Wettest since:
1941
Mar–Sep 1990
7-Month
10.52"
(267.21mm)
10.67"
(271.02mm)
-0.15"
(-3.81mm)
62nd Driest
Driest since:
2012
67th Wettest
Wettest since:
1941
Feb–Sep 1990
8-Month
11.21"
(284.73mm)
11.63"
(295.40mm)
-0.42"
(-10.67mm)
55th Driest
Driest since:
2012
74th Wettest
Wettest since:
1945
Jan–Sep 1990
9-Month
12.19"
(309.63mm)
12.70"
(322.58mm)
-0.51"
(-12.95mm)
55th Driest
Driest since:
1919
74th Wettest
Wettest since:
1915, 1945
Dec 1989–Sep 1990
10-Month
13.08"
(332.23mm)
13.71"
(348.23mm)
-0.63"
(-16.00mm)
52nd Driest
Driest since:
1919
76th Wettest
Wettest since:
1923
Ties: 2005
Nov 1989–Sep 1990
11-Month
13.88"
(352.55mm)
14.74"
(374.40mm)
-0.86"
(-21.85mm)
49th Driest
Driest since:
1919
79th Wettest
Wettest since:
1923
Oct 1989–Sep 1990
12-Month
14.97"
(380.24mm)
15.94"
(404.88mm)
-0.97"
(-24.64mm)
49th Driest
Driest since:
1919
79th Wettest
Wettest since:
1995
Apr 1989–Sep 1990
18-Month
23.68"
(601.47mm)
25.35"
(643.89mm)
-1.67"
(-42.42mm)
46th Driest
Driest since:
2021
82nd Wettest
Wettest since:
1945
Oct 1988–Sep 1990
24-Month
29.64"
(752.86mm)
31.88"
(809.75mm)
-2.24"
(-56.89mm)
36th Driest
Driest since:
2002
91st Wettest
Wettest since:
1998
Oct 1987–Sep 1990
36-Month
41.39"
(1,051.31mm)
47.81"
(1,214.37mm)
-6.42"
(-163.06mm)
14th Driest
Driest since:
2002
112th Wettest
Wettest since:
1997
Oct 1986–Sep 1990
48-Month
56.91"
(1,445.51mm)
63.72"
(1,618.49mm)
-6.81"
(-172.98mm)
14th Driest
Driest since:
2003
111th Wettest
Wettest since:
1998
Oct 1985–Sep 1990
60-Month
75.27"
(1,911.86mm)
79.56"
(2,020.82mm)
-4.29"
(-108.96mm)
34th Driest
Driest since:
2004
90th Wettest
Wettest since:
1999

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