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 1930

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 1930
1-Month
1.02"
(25.91mm)
1.24"
(31.50mm)
-0.22"
(-5.59mm)
56th Driest
Driest since:
1979
73rd Wettest
Wettest since:
1923
Ties: 1980
Aug–Sep 1930
2-Month
4.21"
(106.93mm)
2.31"
(58.67mm)
1.90"
(48.26mm)
125th Driest
Driest since:
2012
4th Wettest
Wettest since:
1923
Ties: 1982
Jul–Sep 1930
3-Month
5.48"
(139.19mm)
3.59"
(91.19mm)
1.89"
(48.00mm)
121st Driest
Driest since:
1964
8th Wettest
Wettest since:
1923
Jun–Sep 1930
4-Month
6.46"
(164.08mm)
5.43"
(137.92mm)
1.03"
(26.16mm)
106th Driest
Driest since:
2012
23rd Wettest
Wettest since:
1923
May–Sep 1930
5-Month
9.12"
(231.65mm)
7.64"
(194.06mm)
1.48"
(37.59mm)
104th Driest
Driest since:
1919
25th Wettest
Wettest since:
1915
Apr–Sep 1930
6-Month
10.35"
(262.89mm)
9.42"
(239.27mm)
0.93"
(23.62mm)
93rd Driest
Driest since:
2012
36th Wettest
Wettest since:
1941
Mar–Sep 1930
7-Month
11.47"
(291.34mm)
10.67"
(271.02mm)
0.80"
(20.32mm)
85th Driest
Driest since:
2012
44th Wettest
Wettest since:
1941
Feb–Sep 1930
8-Month
12.34"
(313.44mm)
11.63"
(295.40mm)
0.71"
(18.04mm)
83rd Driest
Driest since:
2012
46th Wettest
Wettest since:
1945
Ties: 1926, 2010
Jan–Sep 1930
9-Month
13.53"
(343.66mm)
12.70"
(322.58mm)
0.83"
(21.08mm)
85th Driest
Driest since:
1919
44th Wettest
Wettest since:
1915, 1945
Dec 1929–Sep 1930
10-Month
14.21"
(360.93mm)
13.71"
(348.23mm)
0.50"
(12.70mm)
76th Driest
Driest since:
1919
52nd Wettest
Wettest since:
1923
Nov 1929–Sep 1930
11-Month
15.32"
(389.13mm)
14.74"
(374.40mm)
0.58"
(14.73mm)
75th Driest
Driest since:
1919
53rd Wettest
Wettest since:
1923
Oct 1929–Sep 1930
12-Month
16.42"
(417.07mm)
15.94"
(404.88mm)
0.48"
(12.19mm)
73rd Driest
Driest since:
1919
55th Wettest
Wettest since:
1995
Apr 1929–Sep 1930
18-Month
26.12"
(663.45mm)
25.35"
(643.89mm)
0.77"
(19.56mm)
74th Driest
Driest since:
2021
54th Wettest
Wettest since:
1945
Oct 1928–Sep 1930
24-Month
34.53"
(877.06mm)
31.88"
(809.75mm)
2.65"
(67.31mm)
100th Driest
Driest since:
2002
27th Wettest
Wettest since:
1998
Oct 1927–Sep 1930
36-Month
50.99"
(1,295.15mm)
47.81"
(1,214.37mm)
3.18"
(80.78mm)
98th Driest
Driest since:
2002
28th Wettest
Wettest since:
1997
Ties: 2015
Oct 1926–Sep 1930
48-Month
70.63"
(1,794.00mm)
63.72"
(1,618.49mm)
6.91"
(175.51mm)
114th Driest
Driest since:
2003
11th Wettest
Wettest since:
1998
Ties: 2019
Oct 1925–Sep 1930
60-Month
87.85"
(2,231.39mm)
79.56"
(2,020.82mm)
8.29"
(210.57mm)
115th Driest
Driest since:
2004
9th Wettest
Wettest since:
1999

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