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 1955

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 1955
1-Month
1.12"
(28.45mm)
1.24"
(31.50mm)
-0.12"
(-3.05mm)
67th Driest
Driest since:
1979
62nd Wettest
Wettest since:
1923
Ties: 1951
Aug–Sep 1955
2-Month
2.16"
(54.86mm)
2.31"
(58.67mm)
-0.15"
(-3.81mm)
61st Driest
Driest since:
2012
68th Wettest
Wettest since:
1923
Ties: 2000
Jul–Sep 1955
3-Month
3.13"
(79.50mm)
3.59"
(91.19mm)
-0.46"
(-11.69mm)
54th Driest
Driest since:
1964
75th Wettest
Wettest since:
1923
Jun–Sep 1955
4-Month
5.25"
(133.35mm)
5.43"
(137.92mm)
-0.18"
(-4.57mm)
64th Driest
Driest since:
2012
65th Wettest
Wettest since:
1923
May–Sep 1955
5-Month
7.33"
(186.18mm)
7.64"
(194.06mm)
-0.31"
(-7.88mm)
59th Driest
Driest since:
1919
70th Wettest
Wettest since:
1915
Apr–Sep 1955
6-Month
8.52"
(216.41mm)
9.42"
(239.27mm)
-0.90"
(-22.86mm)
43rd Driest
Driest since:
2012
86th Wettest
Wettest since:
1941
Mar–Sep 1955
7-Month
9.69"
(246.13mm)
10.67"
(271.02mm)
-0.98"
(-24.89mm)
37th Driest
Driest since:
2012
92nd Wettest
Wettest since:
1941
Feb–Sep 1955
8-Month
11.09"
(281.69mm)
11.63"
(295.40mm)
-0.54"
(-13.71mm)
51st Driest
Driest since:
2012
78th Wettest
Wettest since:
1945
Ties: 1980
Jan–Sep 1955
9-Month
11.80"
(299.72mm)
12.70"
(322.58mm)
-0.90"
(-22.86mm)
43rd Driest
Driest since:
1919
86th Wettest
Wettest since:
1915, 1945
Dec 1954–Sep 1955
10-Month
12.45"
(316.23mm)
13.71"
(348.23mm)
-1.26"
(-32.00mm)
39th Driest
Driest since:
1919
89th Wettest
Wettest since:
1923
Nov 1954–Sep 1955
11-Month
12.91"
(327.91mm)
14.74"
(374.40mm)
-1.83"
(-46.49mm)
27th Driest
Driest since:
1919
101st Wettest
Wettest since:
1923
Oct 1954–Sep 1955
12-Month
13.87"
(352.30mm)
15.94"
(404.88mm)
-2.07"
(-52.58mm)
30th Driest
Driest since:
1919
98th Wettest
Wettest since:
1995
Apr 1954–Sep 1955
18-Month
19.94"
(506.48mm)
25.35"
(643.89mm)
-5.41"
(-137.41mm)
6th Driest
Driest since:
2021
122nd Wettest
Wettest since:
1945
Oct 1953–Sep 1955
24-Month
26.25"
(666.75mm)
31.88"
(809.75mm)
-5.63"
(-143.00mm)
10th Driest
Driest since:
2002
117th Wettest
Wettest since:
1998
Oct 1952–Sep 1955
36-Month
39.39"
(1,000.51mm)
47.81"
(1,214.37mm)
-8.42"
(-213.86mm)
3rd Driest
Driest since:
2002
123rd Wettest
Wettest since:
1997
Oct 1951–Sep 1955
48-Month
54.76"
(1,390.90mm)
63.72"
(1,618.49mm)
-8.96"
(-227.59mm)
6th Driest
Driest since:
2003
119th Wettest
Wettest since:
1998
Oct 1950–Sep 1955
60-Month
69.94"
(1,776.48mm)
79.56"
(2,020.82mm)
-9.62"
(-244.34mm)
5th Driest
Driest since:
2004
119th Wettest
Wettest since:
1999

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