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 1977

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2021)
Wettest/Driest
Since
Record
December 1977
1-Month
1.45"
(36.83mm)
1.01"
(25.65mm)
0.44"
(11.18mm)
115th Driest
Driest since:
1986
13th Wettest
Wettest since:
1964, 1996
Ties: 1945, 1967
Nov–Dec 1977
2-Month
2.67"
(67.82mm)
2.05"
(52.07mm)
0.62"
(15.75mm)
109th Driest
Driest since:
1914
19th Wettest
Wettest since:
1983
Ties: 1945
Oct–Dec 1977
3-Month
3.60"
(91.44mm)
3.24"
(82.30mm)
0.36"
(9.14mm)
83rd Driest
Driest since:
1976
45th Wettest
Wettest since:
1942
Ties: 1922, 1978
Sep–Dec 1977
4-Month
4.45"
(113.03mm)
4.48"
(113.79mm)
-0.03"
(-0.76mm)
67th Driest
Driest since:
1952
61st Wettest
Wettest since:
2013
Aug–Dec 1977
5-Month
6.17"
(156.72mm)
5.55"
(140.97mm)
0.62"
(15.75mm)
88th Driest
Driest since:
1904
40th Wettest
Wettest since:
1923
Jul–Dec 1977
6-Month
8.10"
(205.74mm)
6.83"
(173.48mm)
1.27"
(32.26mm)
107th Driest
Driest since:
1939
21st Wettest
Wettest since:
1923
Jun–Dec 1977
7-Month
9.16"
(232.66mm)
8.67"
(220.22mm)
0.49"
(12.44mm)
85th Driest
Driest since:
1935
43rd Wettest
Wettest since:
1923
Ties: 1944
May–Dec 1977
8-Month
11.31"
(287.27mm)
10.88"
(276.35mm)
0.43"
(10.92mm)
75th Driest
Driest since:
1900
53rd Wettest
Wettest since:
1923
Apr–Dec 1977
9-Month
12.60"
(320.04mm)
12.66"
(321.56mm)
-0.06"
(-1.52mm)
66th Driest
Driest since:
1954
62nd Wettest
Wettest since:
1941
Ties: 2018
Mar–Dec 1977
10-Month
14.14"
(359.16mm)
13.91"
(353.31mm)
0.23"
(5.85mm)
71st Driest
Driest since:
2012
57th Wettest
Wettest since:
1941
Ties: 1928
Feb–Dec 1977
11-Month
14.53"
(369.06mm)
14.88"
(377.95mm)
-0.35"
(-8.89mm)
55th Driest
Driest since:
2012
73rd Wettest
Wettest since:
1941
Ties: 1948
Jan–Dec 1977
12-Month
15.35"
(389.89mm)
15.94"
(404.88mm)
-0.59"
(-14.99mm)
50th Driest
Driest since:
2012
78th Wettest
Wettest since:
1927
Ties: 1901
Jul 1976–Dec 1977
18-Month
20.13"
(511.30mm)
22.77"
(578.36mm)
-2.64"
(-67.06mm)
28th Driest
Driest since:
1934
99th Wettest
Wettest since:
1927
Jan 1976–Dec 1977
24-Month
29.88"
(758.95mm)
31.87"
(809.50mm)
-1.99"
(-50.55mm)
41st Driest
Driest since:
2002
86th Wettest
Wettest since:
1983
Jan 1975–Dec 1977
36-Month
46.93"
(1,192.02mm)
47.82"
(1,214.63mm)
-0.89"
(-22.61mm)
54th Driest
Driest since:
2002
72nd Wettest
Wettest since:
1947
Jan 1974–Dec 1977
48-Month
59.85"
(1,520.19mm)
63.72"
(1,618.49mm)
-3.87"
(-98.30mm)
33rd Driest
Driest since:
2003
92nd Wettest
Wettest since:
1998
Jan 1973–Dec 1977
60-Month
78.13"
(1,984.50mm)
79.58"
(2,021.33mm)
-1.45"
(-36.83mm)
52nd Driest
Driest since:
1935
72nd Wettest
Wettest since:
1999

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