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The table below shows the average, earliest and latest last freeze (32 degrees or colder) dates for locations around West and Central Wyoming, the last freeze date in recent years, and the dates for this season the last freeze occurred in the Spring/Summer between May 1st and July 31st. The locations will be updated for last freeze dates this season

Dates of the Last Spring Freeze Around West and Central Wyoming

Location County Elev. (ft) Early Average Late 2014 Last  <=32°
2013
2012 2011 2010 2009

Clark 3NE
(1961-2014)

Park 4090 MAY 5 MAY 23 JUN 18 MAY 14 MAY 6 MAY 26 MAY 5 MAY 23 MAY 16
Cody
Airport

(1915-2014)
Park 5102 APR 20 MAY 18 JUN 29 MAY 12 MAY 2 MAY 26 MAY 2 MAY 8 JUN 7
Deaver
(1916-2014)
Big Horn 4105 APR 20 MAY 21 JUN 27 MAY 14 MAY 5 MAY 8 MAY 5 MAY 23 MAY 16
Greybull Airport
(1999-2014)
Big Horn 3940 MAY 3 MAY 14 JUN 7 MAY 13 MAY 3 MAY 7 MAY 5 MAY 8 JUN 7
Thermopolis
(1899-2014)
Hot Springs 4313 APR 17 MAY 20 JUN 30 MAY 13 MAY 3 MAY 8 MAY 30 MAY 12 MAY 13
Worland
(1960-2014)
Washakie 4252 APR 17 MAY 12 JUN 12 MAY 13
MAY 3 MAY 8 MAY 6 MAY 9 APR 25
Buffalo
(1899-2014)
Johnson 4670 APR 30 MAY 22 JUL 1 MAY 16 MAY 6 MAY 13 MAY 15 MAY 15 JUN 8
Buffalo
Airport

(1999-2014)
Johnson 4970 MAY 2 MAY 19 JUN 8 MAY 11 MAY 2 MAY 12 MAY 15 MAY 14 JUN 8
Kaycee
(1949-2014)
Johnson 4660 MAY 1 MAY 23 JUL 4 MAY 14 MAY 7 MAY 13 MAY 17 MAY 14 MAY 26
Moose
(1958-2014)
Teton 6470 MAY 21 JUL 2 JUL 31 JUN 15 JUN 16 JUN 27 JUN 27 JUL 15 JUL 9
Dubois
(1907-2014)
Fremont 6955 MAY 25 JUN 27 JUL 31 JUN 18 JUN 16 JUN 21 JUN 27 JUN 21 JUN 23
Riverton
(town)
(1899-2014)
Fremont 4955 APR 20 MAY 22 JUN 27 MAY 14 MAY 3 MAY 8 MAY 30 MAY 25 MAY 8
Fremont 5528 MAY 3 MAY 18 JUN 4 MAY 14 MAY 3 MAY 12 MAY 30 MAY 14 MAY 16
Lander (town)
(1999-2014)
Fremont 5320 MAY 14 JUN 5 JUN 19 JUN 19**
MAY 7 MAY 28 JUN 4 MAY 30 MAY 16
Lander
Hunt Field

(1891-2014)
Fremont 5587 APR 21 MAY 22 JUL 3 JUN 19 MAY 3 MAY 6 MAY 30 MAY 14 MAY 13
Jeffrey City
(1964-2014)
Fremont 6320 MAY 10 JUN 5 JUL 8 JUN 15 JUN 4 MAY 29 JUN 5 MAY 30 MAY 17
Casper Airport
(1939-2014)
Natrona 5350 APR 25 MAY 21 JUL 4 MAY 14 JUN 4 MAY 29 JUN 4 MAY 30 MAY 16
Bedford 3 SE
(1975-2014)
Lincoln 6425 MAY 21 JUN 25 JUL 31 JUN 19 JUN 16 JUN 27 JUN 17 JUN 17 MAY 21
Pinedale
(1948-2014)
Sublette 7195 JUN 11 JUL 5 JUL 31 JUN 19
JUN 16 JUN 16 JUN 23 JUL 4 JUN 23
Big Piney Apt.
(1976-2014)
Sublette 6994 JUN 9 JUL 4 JUL 31 JUL 1
JUN 16 JUN 21 JUN 27 JUL 15 JUN 9
Fossil Butte
(1990-2014)
Lincoln 6780 JUN 20 JUL 4 JUL 31 JUN 22 JUN 21 JUN 21 JUN 21 JUL 15 JUL 15
Green River
(1905-2014)
Sweetwater 6077 MAY 2 JUN 4 JUL 13 MAY 17 MAY 4 MAY 29 MAY 31 JUN 18 M
Rock Springs Apt.
(1948-2014)
Sweetwater 6765 MAY 1 MAY 29 JUN 30 MAY 14 MAY 3 MAY 27 JUN 3 MAY 30 MAY 13
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MMDD = Tmin > 32°F during the past 14 days  |  MMDD = Tmin <= 32°F during the past 14 days |
MMDD
**
= NEW record for latest last freeze date.
MMDD = Record for earliest last freeze date.

Last Updated July 5, 2014


 

 

Average and Recent Lengths of Growing Seasons Around West and Central Wyoming

   
Location County Elev. (ft) Longest Growing Season
Average Growing Season (Days)
Shortest Growing Season 2013 2012 2011 2010 2009

Clark 3NE
(1961-2013)

Park 4090
145 (1963,2005)
118
71 (1976)
 150
108
138
106
128
Deaver
(1916-2013)
Big Horn 4105
160 (1938)
121
86 (1992)
 148
127
138
141
126
Thermopolis
(1899-2013)
Hot Springs 4313
181 (2007)
125
65 (1938)
 146
150
135
154
131
Worland
(1960-2013)
Washakie 4252
176 (1989)
141
102 (1974 )
 146
147
138
152
130
Buffalo
(1899-2013)
Johnson 4670
156 (1998)
124
57 (1904)
 143
93
128
154
111
Kaycee
(1949-2013)
Johnson 4975
145 (1990)
114
78 (1964, 1972)
 142
143
126
M
M
Moose
(1958-2013)
Teton 6470
104 (1961)
50
0 (1995)
69
58
46
39
30
Dubois
(1907-2013)
Fremont 6955
108 (1931)
58
0 (1995)
87
82
66
63
54
Riverton
(1907-2013)
Fremont 4955
159 (1998)
116
67 (1989)
146
127
113
104
136
Lander (town)
(1999-2013)
Fremont 5320
135 (2013)
102
81 (2000, 2005)
135
107
M
M
M
Lander Apt.
(1891-2013)
Fremont 5587
170 (1987)
121
57 (1904)
 145
150
128
163
139
Jeffrey City
(1964-2013)
Fremont 6320
127 (2009)
99
53 (1985, 1993)
107
105
M
95
127
Casper
(1939-2013)
Natrona 5350
165 (1963)
121
78 (1972)
107
107
108
95
119
Bedford 3 SE
(1975-2013)
Lincoln 6425
109 (1990)
61
8 (1995)
86
69
76
66
85
Boulder Rearing Station
(1989-2013)
Sublette 6940
86 (2013)
56
26 (2009)
86
64
45
28
34
Big Piney
(1976-2013)
Sublette 6994
87 (2013)
45
2 (1987)
87
64
46
28
60
Fossil Butte
(1990-2013)
Lincoln 6780
89 (2013)
51
0 (1995)
89
64
72
24
27
Green River
(1905-2013)
Sweetwater 6077
149 (1963)
97
45 (1968)
 144
127
135
M
M
Rock Springs Apt.
(1948-2013)
Sweetwater 6765
155 (1963)
115
73 (1973)

 145

128
124
135
131
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