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 1899

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Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
December 1899
1-Month 		1.02"
(25.91mm)		 1.01"
(25.65mm)		 0.01"
(0.26mm)		 71st Driest
Driest since:
 1986
58th Wettest
Wettest since:
 1964, 1996
Ties: 1913, 2017
Nov–Dec 1899
2-Month 		1.55"
(39.37mm)		 2.05"
(52.07mm)		 -0.50"
(-12.70mm)		 26th Driest
Driest since:
 1914
103rd Wettest
Wettest since:
 1983
Ties: 1898, 1933
Oct–Dec 1899
3-Month 		3.19"
(81.03mm)		 3.24"
(82.30mm)		 -0.05"
(-1.27mm)		 62nd Driest
Driest since:
 1976
67th Wettest
Wettest since:
 1942
Ties: 1990
Sep–Dec 1899
4-Month 		3.66"
(92.96mm)		 4.48"
(113.79mm)		 -0.82"
(-20.83mm)		 29th Driest
Driest since:
 1952
100th Wettest
Wettest since:
 2013
Aug–Dec 1899
5-Month 		4.50"
(114.30mm)		 5.55"
(140.97mm)		 -1.05"
(-26.67mm)		 29th Driest
Driest since:
 1904
100th Wettest
Wettest since:
 1923
Jul–Dec 1899
6-Month 		5.71"
(145.03mm)		 6.83"
(173.48mm)		 -1.12"
(-28.45mm)		 32nd Driest
Driest since:
 1939
97th Wettest
Wettest since:
 1923
Jun–Dec 1899
7-Month 		8.05"
(204.47mm)		 8.67"
(220.22mm)		 -0.62"
(-15.75mm)		 46th Driest
Driest since:
 1935
83rd Wettest
Wettest since:
 1923
Ties: 1929
May–Dec 1899
8-Month 		10.15"
(257.81mm)		 10.88"
(276.35mm)		 -0.73"
(-18.54mm)		 46th Driest
Driest since:
 1900
83rd Wettest
Wettest since:
 1923
Apr–Dec 1899
9-Month 		11.21"
(284.73mm)		 12.66"
(321.56mm)		 -1.45"
(-36.83mm)		 40th Driest
Driest since:
 1954
89th Wettest
Wettest since:
 1941
Mar–Dec 1899
10-Month 		14.09"
(357.89mm)		 13.91"
(353.31mm)		 0.18"
(4.58mm)		 70th Driest
Driest since:
 2012
59th Wettest
Wettest since:
 1941
Feb–Dec 1899
11-Month 		16.38"
(416.05mm)		 14.88"
(377.95mm)		 1.50"
(38.10mm)		 96th Driest
Driest since:
 2012
33rd Wettest
Wettest to Date
 1941
Ties: 1997
Jan–Dec 1899
12-Month 		18.41"
(467.61mm)		 15.94"
(404.88mm)		 2.47"
(62.73mm)		 111th Driest
Driest since:
 2012
18th Wettest
Wettest to Date
 1927
Jul 1898–Dec 1899
18-Month 		23.26"
(590.80mm)		 22.77"
(578.36mm)		 0.49"
(12.44mm)		 73rd Driest
Driest since:
 1934
55th Wettest
Wettest to Date
 1927
Jan 1898–Dec 1899
24-Month 		32.67"
(829.82mm)		 31.87"
(809.50mm)		 0.80"
(20.32mm)		 74th Driest
Driest since:
 2002
54th Wettest
Wettest since:
 1983
Jan 1897–Dec 1899
36-Month 		46.85"
(1,189.99mm)		 47.82"
(1,214.63mm)		 -0.97"
(-24.64mm)		 54th Driest
Driest since:
 2002
73rd Wettest
Wettest since:
 1947
Jan 1896–Dec 1899
48-Month 		64.21"
(1,630.93mm)		 63.72"
(1,618.49mm)		 0.49"
(12.44mm)		 70th Driest
Driest since:
 2003
56th Wettest
Wettest to Date
 1998
Jan 1895–Dec 1899
60-Month 		80.69"
(2,049.53mm)		 79.58"
(2,021.33mm)		 1.11"
(28.20mm)		 77th Driest
Driest to Date
 1935
48th Wettest
Wettest to Date
 1999

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