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Fall First Freeze Information
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Midwestern Regional Cimate Center Graphics

First Freeze Data:
32° F

Dates of First 32°F Freeze: Wyoming
Days since Most Recent 32°F Freeze
Date of Most Recent 32°F Freeze
Over past 14 days
Number of Days <=
32°F
Growing Degree Days (base 42°F) Since Most Recent 32°F Freeze


Midwestern Regional Cimate Center Graphics

First Hard Freeze Data:
28° F

Dates of First 28°F Freeze: Wyoming
Days since Most Recent 28°F Freeze
Date of Most Recent 28°F Freeze
Over past 14 days
Number of Days <=
28°F
Growing Degree Days (base 42°F) Since Most Recent 28°F Freeze

Climatological First Freeze Graphics
Date of Median First 32° F Freeze
Date of Early First 32° F Freeze
Date of Late First 32° F Freeze
Date of Median First 28° F Freeze
Date of Early First 28° F Freeze
Date of Late First 28° F Freeze

7 Day Minimum Temperature Forecast
Tonight's Lows
Tomorrow Night's Lows
Night 3 Lows
Tonight's Lows - Click to Enlarge
Tomorrow Night's Lows - Click to Enlarge
Night 3 Lows - Click to Enlarge
Night 4 Lows
Night 5 Lows
Night 6 Lows
Night 4 Lows - Click to Enlarge
Night 5 Lows - Click to Enlarge
Night 6 Lows - Click to Enlarge
Night 7 Lows
6 - 10 Day Outlook
8 - 14 Day Outlook
Night 7 Lows - Click to Enlarge
6 - 10 Day Outlook - Click to Enlarge
8 - 14 Day Outlook - Click to Enlarge

More Information

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Climatological First Freeze Data
Location County Elev.
(ft)
Early    
Average Late 
2014 33F-36F 2014 29F-32F 2014 <=28F 2013 2012 2011 2010
Clark 3NE
(1961-2014)
Park 4090 AUG 25 SEP 16 OCT 15  SEP 5  SEP 12
 SEP 12
OCT 4 SEP 12 SEP 21 SEP 7
Cody Airport
(1915-2014)
Park 5100 AUG 21 SEP 27
NOV 1  SEP 11  SEP 11
 SEP 12
OCT 3 OCT 4
OCT 9
OCT 12
(1916-2014)
Big Horn 4105 AUG 26 SEP 18 OCT 17  SEP 12  SEP 12  SEP 12
OCT 1 SEP 13 SEP 21 SEP 18
(1999-2014)
Big Horn 3935 SEP 12 OCT 1 OCT 18  SEP 11  SEP 12
 OCT 3
OCT 4 OCT 4 OCT 18 OCT 13
Thermopolis
(1899-2014)
Hot Springs 4315 AUG 15 OCT 2 OCT 19  Sep 11  SEP 12  OCT 17
SEP 27 OCT 6 SEP 13 SEP 22
Worland Airport
(1960-2014)
Washakie 4245 SEP 2 OCT 1 OCT 18  SEP 11  SEP 12  OCT 3
SEP 28 OCT 3 SEP 21 OCT 13
Buffalo
(1899-2014)
Johnson 4670 AUG 15 SEP 18 OCT 17  SEP 11
 SEP 11  SEP 12
SEP 27 OCT 4 SEP 21 OCT 17
Buffalo Airport
(1999-2014)
Johnson 4970 SEP 17 OCT 2
OCT 19  SEP 11
 SEP 11
 SEP 12
SEP 27
OCT 3
OCT 19
OCT 12
Kaycee
(1949-2014)
Johnson 4975 AUG 20 SEP 14 OCT 11  SEP 11  SEP 11  SEP 14
SEP 27 OCT 4 SEP 21 SEP 8
Moose
(1958-2014)
Teton 6470 AUG 1
AUG 24 SEP 23  AUG 2  AUG 2  AUG 2 SEP 1 AUG 25 AUG 13 AUG 24
Dubois
(1907-2014)
Fremont 6955 AUG 1 AUG 31 SEP 21  SEP 1
 SEP 4  SEP 12
SEP 19 SEP 12 SEP 2 AUG 24
Riverton
(1907-2014)
Fremont 4950 AUG 7 SEP 17 OCT 11  SEP 12
 SEP 12
 SEP 12
SEP 27 SEP 13 SEP 21 SEP 7
Lander (town)
(1999-2014)
Fremont 5320 AUG 31 SEP 11 SEP 24  SEP 2  SEP 13  SEP 13
SEP 20 SEP 13 SEP 21 SEP 7
Lander Hunt Field
(1891-2014)
Fremont 5585 SEP 3 SEP 26 OCT 25  SEP 11  SEP 12  
SEP 26 OCT 4 OCT 6 OCT 25
Jeffrey City
(1964-2014)
Fremont 6320 AUG 10 SEP 13 OCT 5  AUG 10
 AUG 10 (R)
 SEP 2
SEP 20 SEP 12 SEP 20 SEP 3
Casper Airport
(1939-2014)
Natrona 5320 SEP 1 SEP 20 OCT 28  SEP 2  SEP 12  SEP 12 SEP 20 SEP 14 SEP 21 SEP 3
Location County Elev.
(ft)
Early    
Average Late 
2014 33F-36F 2014 29F-32F 2014 <=28F 2013 2012 2011 2010
Afton
(1957-2014)
Lincoln 6245 AUG 2 AUG 27 SEP 24  SEP 1  SEP 4  SEP 12 SEP 19 SEP 12 M M
Bedford 3 SE
(1975-2014)
Lincoln 6425 AUG 4
AUG 27 OCT 2  SEP 1  SEP 4  SEP 5
SEP 19 SEP 5 SEP 2 AUG 23
Sublette 6940 AUG 1 AUG 21 SEP 19  AUG 25  SEP 1  SEP 11
SEP 19 AUG 25 AUG 12 AUG 24
Big Piney Airport
(1976-2014)
Sublette 6975 AUG 3 AUG 10 SEP 19  AUG 31
 SEP 1  SEP 11 SEP 19 AUG 25 AUG 13 AUG 13
Fossil Butte
(1990-2014)
Lincoln 6780 AUG 1 AUG 22 SEP 19  SEP 1  SEP 1  SEP 12 SEP 19 AUG 25 SEP 2 AUG 13
Green River
(1905-2014)
Sweetwater 6130 AUG 4 SEP 9 OCT 14  SEP 12  SEP 12  OCT 13
SEP 26 OCT 4 OCT 14 SEP 7
Rock Springs Apt.
(1948-2014)
Sweetwater 6760 SEP 1 SEP 23 OCT 24
 SEP 12  SEP 12  SEP 12
SEP 26 OCT 4 OCT 6 OCT 13

Updated on October 20, 2014   ((R)= New Record for the Season

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Growing Season Data
Location County Elev. (ft) Longest Growing Season
Average Growing Season (Days)
Shortest Growing Season 2014 2013 2012 2011 2010

Clark 3NE
(1961-2014)

Park 4090
145 (1963,2005)
118
71 (1976)
120
150
108
138
106
Deaver
(1916-2014)
Big Horn 4105
160 (1938)
121
86 (1992)
120
148
127
138
141
Thermopolis
(1899-2014)
Hot Springs 4315
181 (2007)
125
65 (1938)
121
146
150
135
154
Worland
(1960-2014)
Washakie 4245
176 (1989)
141
102 (1974 )
 120
146
147
138
152
Buffalo
(1899-2014)
Johnson 4670
156 (1998)
124
57 (1904)
117
143
93
128
154
Kaycee
(1949-2014)
Johnson 4975
145 (1963)
114
78 (1964)
119
142
143
126
M
Moose
(1958-2014)
Teton 6470
104 (1961)
50
0 (1995)
43
69
58
46
39
Dubois
(1907-2014)
Fremont 6955
108 (1931)
58
0 (1995)
77
87
82
66
63
Riverton
(1907-2014)
Fremont 4950
159 (1998)
116
67 (1989)
120
146
127
113
104
Lander (town)
(1999-2014)
Fremont 5320
135 (2013)
102
81 (2000, 2005)
85
135
107
M
M
Lander Apt.
(1891-2014)
Fremont 5585
170 (1987)
121
57 (1904)
 106
145
150
128
163
Jeffrey City
(1964-2014)
Fremont 6320
127 (2009)
99
53 (1985, 1993)
55
107
105
M
95
Casper Apt.
(1939-2014)
Natrona 5320
165 (1963)
121
78 (1972)
 119
107
107
108
95
Location County Elev. (ft) Longest Growing Season
Average Growing Season (Days)
Shortest Growing Season 2014 2013 2012 2011 2010
Afton
(1957)
Lincoln 6245  108 (2009) 57  10 (1976) 76  87 82 M M
Bedford 3 SE
(1975-2014)
Lincoln 6425
109 (1990)
61
8 (1995)
76
86
69
76
66
Boulder Rearing Station
(1989-2014)
Sublette 6940
86 (2013)
56
26 (2009)
60
86
64
45
28
Big Piney
(1976-2014)
Sublette 6975
87 (2013)
45
2 (1987)
61
87
64
46
28
Fossil Butte
(1990-2014)
Lincoln 6780
89 (2013)
51
0 (1995)
61
89
64
72
24
Green River
(1905-2014)
Sweetwater 6130
149 (1963)
97
45 (1968)
117
144
127
135
M
Rock Springs Apt.
(1948-2014)
Sweetwater 6760
155 (1963)
115
73 (1973)

119

145
128
124
135
Growing Season = Number of Days between last Spring Freeze and first Fall freeze (<= 32°F)
M = missing data during the period.
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