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 1921

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  • Record Wettest
Period Value 1901-2000
Mean		 Anomaly Rank
(1895-2022)		 Wettest/Driest
Since		 Record
December 1921
1-Month 		1.86"
(47.24mm)		 1.01"
(25.65mm)		 0.85"
(21.59mm)		 125th Driest
Driest since:
 1986
4th Wettest
Wettest to Date
 1964, 1996
Nov–Dec 1921
2-Month 		3.33"
(84.58mm)		 2.05"
(52.07mm)		 1.28"
(32.51mm)		 123rd Driest
Driest since:
 1914
6th Wettest
Wettest to Date
 1983
Oct–Dec 1921
3-Month 		3.70"
(93.98mm)		 3.24"
(82.30mm)		 0.46"
(11.68mm)		 91st Driest
Driest since:
 1976
38th Wettest
Wettest since:
 1942
Sep–Dec 1921
4-Month 		4.27"
(108.46mm)		 4.48"
(113.79mm)		 -0.21"
(-5.33mm)		 57th Driest
Driest since:
 1952
72nd Wettest
Wettest since:
 2013
Ties: 1957
Aug–Dec 1921
5-Month 		5.14"
(130.56mm)		 5.55"
(140.97mm)		 -0.41"
(-10.41mm)		 48th Driest
Driest since:
 1904
81st Wettest
Wettest since:
 1923
Jul–Dec 1921
6-Month 		6.10"
(154.94mm)		 6.83"
(173.48mm)		 -0.73"
(-18.54mm)		 41st Driest
Driest since:
 1939
88th Wettest
Wettest since:
 1923
Jun–Dec 1921
7-Month 		8.31"
(211.07mm)		 8.67"
(220.22mm)		 -0.36"
(-9.15mm)		 58th Driest
Driest since:
 1935
71st Wettest
Wettest since:
 1923
May–Dec 1921
8-Month 		10.81"
(274.57mm)		 10.88"
(276.35mm)		 -0.07"
(-1.78mm)		 65th Driest
Driest since:
 1900
64th Wettest
Wettest since:
 1923
Apr–Dec 1921
9-Month 		12.29"
(312.17mm)		 12.66"
(321.56mm)		 -0.37"
(-9.39mm)		 56th Driest
Driest since:
 1954
73rd Wettest
Wettest since:
 1941
Mar–Dec 1921
10-Month 		13.30"
(337.82mm)		 13.91"
(353.31mm)		 -0.61"
(-15.49mm)		 52nd Driest
Driest since:
 2012
77th Wettest
Wettest since:
 1941
Feb–Dec 1921
11-Month 		13.88"
(352.55mm)		 14.88"
(377.95mm)		 -1.00"
(-25.40mm)		 42nd Driest
Driest since:
 2012
87th Wettest
Wettest since:
 1941
Jan–Dec 1921
12-Month 		15.06"
(382.52mm)		 15.94"
(404.88mm)		 -0.88"
(-22.36mm)		 48th Driest
Driest since:
 2012
81st Wettest
Wettest since:
 1927
Jul 1920–Dec 1921
18-Month 		21.18"
(537.97mm)		 22.77"
(578.36mm)		 -1.59"
(-40.39mm)		 39th Driest
Driest since:
 1934
89th Wettest
Wettest since:
 1927
Ties: 1958
Jan 1920–Dec 1921
24-Month 		30.65"
(778.51mm)		 31.87"
(809.50mm)		 -1.22"
(-30.99mm)		 48th Driest
Driest since:
 2002
80th Wettest
Wettest since:
 1983
Jan 1919–Dec 1921
36-Month 		42.84"
(1,088.14mm)		 47.82"
(1,214.63mm)		 -4.98"
(-126.49mm)		 20th Driest
Driest since:
 2002
107th Wettest
Wettest since:
 1947
Jan 1918–Dec 1921
48-Month 		59.84"
(1,519.94mm)		 63.72"
(1,618.49mm)		 -3.88"
(-98.55mm)		 33rd Driest
Driest since:
 2003
93rd Wettest
Wettest since:
 1998
Jan 1917–Dec 1921
60-Month 		74.63"
(1,895.60mm)		 79.58"
(2,021.33mm)		 -4.95"
(-125.73mm)		 30th Driest
Driest since:
 1935
95th Wettest
Wettest since:
 1999

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