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 1987

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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 1987
1-Month 		1.16"
(29.46mm)		 1.01"
(25.65mm)		 0.15"
(3.81mm)		 87th Driest
Driest since:
 1986
42nd Wettest
Wettest since:
 1964, 1996
Ties: 1925, 2005
Nov–Dec 1987
2-Month 		2.26"
(57.40mm)		 2.05"
(52.07mm)		 0.21"
(5.33mm)		 86th Driest
Driest since:
 1914
43rd Wettest
Wettest since:
 1983
Oct–Dec 1987
3-Month 		2.76"
(70.10mm)		 3.24"
(82.30mm)		 -0.48"
(-12.20mm)		 30th Driest
Driest since:
 1976
99th Wettest
Wettest since:
 1942
Sep–Dec 1987
4-Month 		3.39"
(86.11mm)		 4.48"
(113.79mm)		 -1.09"
(-27.68mm)		 19th Driest
Driest since:
 1952
110th Wettest
Wettest since:
 2013
Aug–Dec 1987
5-Month 		4.78"
(121.41mm)		 5.55"
(140.97mm)		 -0.77"
(-19.56mm)		 35th Driest
Driest since:
 1904
94th Wettest
Wettest since:
 1923
Ties: 1992
Jul–Dec 1987
6-Month 		6.75"
(171.45mm)		 6.83"
(173.48mm)		 -0.08"
(-2.03mm)		 60th Driest
Driest since:
 1939
69th Wettest
Wettest since:
 1923
Jun–Dec 1987
7-Month 		8.27"
(210.06mm)		 8.67"
(220.22mm)		 -0.40"
(-10.16mm)		 55th Driest
Driest since:
 1935
74th Wettest
Wettest since:
 1923
Ties: 1978
May–Dec 1987
8-Month 		11.13"
(282.70mm)		 10.88"
(276.35mm)		 0.25"
(6.35mm)		 70th Driest
Driest since:
 1900
59th Wettest
Wettest since:
 1923
Apr–Dec 1987
9-Month 		11.63"
(295.40mm)		 12.66"
(321.56mm)		 -1.03"
(-26.16mm)		 47th Driest
Driest since:
 1954
82nd Wettest
Wettest since:
 1941
Mar–Dec 1987
10-Month 		12.90"
(327.66mm)		 13.91"
(353.31mm)		 -1.01"
(-25.65mm)		 42nd Driest
Driest since:
 2012
87th Wettest
Wettest since:
 1941
Ties: 1932
Feb–Dec 1987
11-Month 		13.96"
(354.58mm)		 14.88"
(377.95mm)		 -0.92"
(-23.37mm)		 46th Driest
Driest since:
 2012
83rd Wettest
Wettest since:
 1941
Jan–Dec 1987
12-Month 		14.86"
(377.44mm)		 15.94"
(404.88mm)		 -1.08"
(-27.44mm)		 43rd Driest
Driest since:
 2012
86th Wettest
Wettest since:
 1927
Jul 1986–Dec 1987
18-Month 		22.60"
(574.04mm)		 22.77"
(578.36mm)		 -0.17"
(-4.32mm)		 62nd Driest
Driest since:
 1934
66th Wettest
Wettest since:
 1927
Jan 1986–Dec 1987
24-Month 		32.77"
(832.36mm)		 31.87"
(809.50mm)		 0.90"
(22.86mm)		 76th Driest
Driest since:
 2002
52nd Wettest
Wettest since:
 1983
Ties: 1951
Jan 1985–Dec 1987
36-Month 		46.99"
(1,193.55mm)		 47.82"
(1,214.63mm)		 -0.83"
(-21.08mm)		 58th Driest
Driest since:
 2002
69th Wettest
Wettest since:
 1947
Jan 1984–Dec 1987
48-Month 		62.62"
(1,590.55mm)		 63.72"
(1,618.49mm)		 -1.10"
(-27.94mm)		 60th Driest
Driest since:
 2003
66th Wettest
Wettest since:
 1998
Ties: 1940
Jan 1983–Dec 1987
60-Month 		81.39"
(2,067.31mm)		 79.58"
(2,021.33mm)		 1.81"
(45.98mm)		 80th Driest
Driest since:
 1935
45th Wettest
Wettest since:
 1999

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