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, October 2009

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
October 2009
1-Month
2.02"
(51.31mm)
1.20"
(30.48mm)
0.82"
(20.83mm)
118th Driest
Driest since:
1933
11th Wettest
Wettest since:
1994
Sep–Oct 2009
2-Month
2.65"
(67.31mm)
2.44"
(61.98mm)
0.21"
(5.33mm)
86th Driest
Driest since:
1952
43rd Wettest
Wettest since:
2013
Aug–Oct 2009
3-Month
3.83"
(97.28mm)
3.51"
(89.15mm)
0.32"
(8.13mm)
85th Driest
Driest since:
1958
44th Wettest
Wettest since:
1923
Ties: 1947
Jul–Oct 2009
4-Month
5.28"
(134.11mm)
4.79"
(121.67mm)
0.49"
(12.44mm)
91st Driest
Driest since:
1964
38th Wettest
Wettest since:
1923
Jun–Oct 2009
5-Month
8.50"
(215.90mm)
6.62"
(168.15mm)
1.88"
(47.75mm)
114th Driest
Driest since:
1988
15th Wettest
Wettest since:
1923
May–Oct 2009
6-Month
9.76"
(247.90mm)
8.84"
(224.54mm)
0.92"
(23.36mm)
92nd Driest
Driest since:
2012
37th Wettest
Wettest since:
1923
Apr–Oct 2009
7-Month
12.26"
(311.40mm)
10.61"
(269.49mm)
1.65"
(41.91mm)
102nd Driest
Driest since:
2012
27th Wettest
Wettest since:
1941
Ties: 1906
Mar–Oct 2009
8-Month
13.86"
(352.04mm)
11.86"
(301.24mm)
2.00"
(50.80mm)
106th Driest
Driest since:
2012
23rd Wettest
Wettest since:
1941
Feb–Oct 2009
9-Month
14.50"
(368.30mm)
12.83"
(325.88mm)
1.67"
(42.42mm)
104th Driest
Driest since:
2012
25th Wettest
Wettest since:
1941
Ties: 2017
Jan–Oct 2009
10-Month
15.84"
(402.34mm)
13.89"
(352.81mm)
1.95"
(49.53mm)
104th Driest
Driest since:
2012
25th Wettest
Wettest since:
1923
Dec 2008–Oct 2009
11-Month
17.04"
(432.82mm)
14.90"
(378.46mm)
2.14"
(54.36mm)
103rd Driest
Driest since:
2012
25th Wettest
Wettest since:
1923
Nov 2008–Oct 2009
12-Month
17.96"
(456.18mm)
15.94"
(404.88mm)
2.02"
(51.30mm)
105th Driest
Driest since:
1960
23rd Wettest
Wettest since:
1923
Ties: 1906
May 2008–Oct 2009
18-Month
27.62"
(701.55mm)
24.75"
(628.65mm)
2.87"
(72.90mm)
108th Driest
Driest since:
1934
20th Wettest
Wettest since:
1927
Nov 2007–Oct 2009
24-Month
33.72"
(856.49mm)
31.86"
(809.24mm)
1.86"
(47.25mm)
87th Driest
Driest since:
2002
40th Wettest
Wettest since:
1998
Ties: 2014
Nov 2006–Oct 2009
36-Month
48.75"
(1,238.25mm)
47.81"
(1,214.37mm)
0.94"
(23.88mm)
77th Driest
Driest since:
2002
49th Wettest
Wettest since:
1947
Nov 2005–Oct 2009
48-Month
61.99"
(1,574.55mm)
63.72"
(1,618.49mm)
-1.73"
(-43.94mm)
50th Driest
Driest since:
2003
75th Wettest
Wettest since:
1998
Nov 2004–Oct 2009
60-Month
77.35"
(1,964.69mm)
79.57"
(2,021.08mm)
-2.22"
(-56.39mm)
45th Driest
Driest since:
1935
79th Wettest
Wettest since:
1999

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