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, December 2015

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
December 2015
1-Month
1.11"
(28.19mm)
1.01"
(25.65mm)
0.10"
(2.54mm)
76th Driest
Driest since:
1986
53rd Wettest
Wettest since:
1964, 1996
Ties: 1927
Nov–Dec 2015
2-Month
2.20"
(55.88mm)
2.05"
(52.07mm)
0.15"
(3.81mm)
84th Driest
Driest since:
1914
45th Wettest
Wettest since:
1983
Ties: 1968, 1972, 2011
Oct–Dec 2015
3-Month
3.31"
(84.07mm)
3.24"
(82.30mm)
0.07"
(1.77mm)
73rd Driest
Driest since:
1976
56th Wettest
Wettest since:
1942
Ties: 1895, 1945, 1960
Sep–Dec 2015
4-Month
3.95"
(100.33mm)
4.48"
(113.79mm)
-0.53"
(-13.46mm)
42nd Driest
Driest since:
1952
87th Wettest
Wettest since:
2013
Aug–Dec 2015
5-Month
4.86"
(123.44mm)
5.55"
(140.97mm)
-0.69"
(-17.53mm)
38th Driest
Driest since:
1904
91st Wettest
Wettest since:
1923
Jul–Dec 2015
6-Month
6.39"
(162.31mm)
6.83"
(173.48mm)
-0.44"
(-11.17mm)
51st Driest
Driest since:
1939
78th Wettest
Wettest since:
1923
Jun–Dec 2015
7-Month
8.28"
(210.31mm)
8.67"
(220.22mm)
-0.39"
(-9.91mm)
57th Driest
Driest since:
1935
72nd Wettest
Wettest since:
1923
May–Dec 2015
8-Month
12.87"
(326.90mm)
10.88"
(276.35mm)
1.99"
(50.55mm)
112th Driest
Driest since:
1900
17th Wettest
Wettest since:
1923
Apr–Dec 2015
9-Month
14.57"
(370.08mm)
12.66"
(321.56mm)
1.91"
(48.52mm)
104th Driest
Driest since:
1954
25th Wettest
Wettest since:
1941
Mar–Dec 2015
10-Month
15.15"
(384.81mm)
13.91"
(353.31mm)
1.24"
(31.50mm)
95th Driest
Driest since:
2012
34th Wettest
Wettest since:
1941
Feb–Dec 2015
11-Month
16.09"
(408.69mm)
14.88"
(377.95mm)
1.21"
(30.74mm)
93rd Driest
Driest since:
2012
36th Wettest
Wettest since:
1941
Jan–Dec 2015
12-Month
16.71"
(424.43mm)
15.94"
(404.88mm)
0.77"
(19.55mm)
82nd Driest
Driest since:
2012
47th Wettest
Wettest since:
1927
Jul 2014–Dec 2015
18-Month
25.50"
(647.70mm)
22.77"
(578.36mm)
2.73"
(69.34mm)
107th Driest
Driest since:
1934
21st Wettest
Wettest since:
1927
Jan 2014–Dec 2015
24-Month
34.81"
(884.17mm)
31.86"
(809.24mm)
2.95"
(74.93mm)
103rd Driest
Driest since:
2002
25th Wettest
Wettest since:
1983
Jan 2013–Dec 2015
36-Month
51.13"
(1,298.70mm)
47.82"
(1,214.63mm)
3.31"
(84.07mm)
98th Driest
Driest since:
2002
29th Wettest
Wettest since:
1947
Jan 2012–Dec 2015
48-Month
62.09"
(1,577.09mm)
63.72"
(1,618.49mm)
-1.63"
(-41.40mm)
51st Driest
Driest since:
2003
75th Wettest
Wettest since:
1998
Jan 2011–Dec 2015
60-Month
80.64"
(2,048.26mm)
79.58"
(2,021.33mm)
1.06"
(26.93mm)
75th Driest
Driest since:
1935
50th Wettest
Wettest since:
1999

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