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 1917

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 1917
1-Month
0.98"
(24.89mm)
1.24"
(31.50mm)
-0.26"
(-6.61mm)
55th Driest
Driest since:
1979
74th Wettest
Wettest since:
1923
Aug–Sep 1917
2-Month
1.66"
(42.16mm)
2.31"
(58.67mm)
-0.65"
(-16.51mm)
41st Driest
Driest since:
2012
88th Wettest
Wettest since:
1923
Jul–Sep 1917
3-Month
2.18"
(55.37mm)
3.59"
(91.19mm)
-1.41"
(-35.82mm)
8th Driest
Driest since:
1964
121st Wettest
Wettest since:
1923
Ties: 1902
Jun–Sep 1917
4-Month
3.09"
(78.49mm)
5.43"
(137.92mm)
-2.34"
(-59.43mm)
6th Driest
Driest since:
2012
123rd Wettest
Wettest since:
1923
May–Sep 1917
5-Month
6.38"
(162.05mm)
7.64"
(194.06mm)
-1.26"
(-32.01mm)
35th Driest
Driest since:
1919
94th Wettest
Wettest since:
1915
Apr–Sep 1917
6-Month
8.65"
(219.71mm)
9.42"
(239.27mm)
-0.77"
(-19.56mm)
48th Driest
Driest since:
2012
81st Wettest
Wettest since:
1941
Mar–Sep 1917
7-Month
10.06"
(255.52mm)
10.67"
(271.02mm)
-0.61"
(-15.50mm)
49th Driest
Driest since:
2012
80th Wettest
Wettest since:
1941
Feb–Sep 1917
8-Month
11.42"
(290.07mm)
11.63"
(295.40mm)
-0.21"
(-5.33mm)
64th Driest
Driest since:
2012
65th Wettest
Wettest since:
1945
Jan–Sep 1917
9-Month
12.34"
(313.44mm)
12.70"
(322.58mm)
-0.36"
(-9.14mm)
60th Driest
Driest since:
1919
69th Wettest
Wettest since:
1915, 1945
Dec 1916–Sep 1917
10-Month
13.72"
(348.49mm)
13.71"
(348.23mm)
0.01"
(0.26mm)
67th Driest
Driest since:
1919
61st Wettest
Wettest since:
1923
Nov 1916–Sep 1917
11-Month
14.44"
(366.78mm)
14.74"
(374.40mm)
-0.30"
(-7.62mm)
61st Driest
Driest since:
1919
67th Wettest
Wettest since:
1923
Oct 1916–Sep 1917
12-Month
16.16"
(410.46mm)
15.94"
(404.88mm)
0.22"
(5.58mm)
70th Driest
Driest since:
1919
58th Wettest
Wettest since:
1995
Ties: 1942
Apr 1916–Sep 1917
18-Month
21.77"
(552.96mm)
25.35"
(643.89mm)
-3.58"
(-90.93mm)
21st Driest
Driest since:
2021
107th Wettest
Wettest since:
1945
Oct 1915–Sep 1917
24-Month
28.79"
(731.27mm)
31.88"
(809.75mm)
-3.09"
(-78.48mm)
26th Driest
Driest since:
2002
101st Wettest
Wettest since:
1998
Oct 1914–Sep 1917
36-Month
47.27"
(1,200.66mm)
47.81"
(1,214.37mm)
-0.54"
(-13.71mm)
61st Driest
Driest since:
2002
65th Wettest
Wettest since:
1997
Oct 1913–Sep 1917
48-Month
61.74"
(1,568.20mm)
63.72"
(1,618.49mm)
-1.98"
(-50.29mm)
48th Driest
Driest since:
2003
77th Wettest
Wettest since:
1998
Oct 1912–Sep 1917
60-Month
76.16"
(1,934.46mm)
79.56"
(2,020.82mm)
-3.40"
(-86.36mm)
40th Driest
Driest since:
2004
84th Wettest
Wettest since:
1999

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