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Western and Central Wyoming

Weather Forecast Office

Spring Frost & Freeze Page

Weather.gov > Western and Central Wyoming > Spring Frost & Freeze Page
Spring Last Freeze Information
Current Freeze Watches  Quick Jumps Current Freeze Warnings
   Climatological Last Freeze Graphics  7 Day Minimum Temperature Forecast Freeze Data for Specific Cities  Growing Season Data for Specific Cities
 
Click on Images to Enlarge


Last Freeze Data:
32º F
 
 
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

 




Last Hard Freeze Data:
28º F
 
 
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 Last Freeze Graphics
Date of Median Last 32° F Freeze
Date of Early Last 32° F Freeze
Date of Late Last 32° F Freeze
 
 
Date of Median Last 28° F Freeze
Date of Early Last 28° F Freeze
Date of Late Last 28° F Freeze

 

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

More Information
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Dates of the Last Spring Freeze Around West and Central Wyoming
Location County Elev. (ft) Early Average Late 2024
Last  <=32°		 2023 2022 2021 202 2019

Clark 3NE
(1961-2021)

 Park 4090 MAY 5 MAY 23 Jun 19 *19 Jun 10 May 25 May 30 May 8 May  9 Jun
Cody
(1915-2021)		 Park 5102 APR 20 MAY 18 JUN 29 24 May 28 Apr 22 May 23 May 12 May 22 May
Deaver
(1916-2021)
 Big Horn 4105 APR 19 MAY 18 JUN 21 19 Jun 29 Apr 22 May 25 Apr 9 May 4 May
Greybull Airport
(1999-2021)		 Big Horn 3940 APR 15 MAY 8 JUN 7 4 May 28 Apr M 11 May 20 Apr 10 May
Thermopolis
(1899-2021)
 Hot Springs 4313 APR 17 MAY 17 JUN 29 4 May 29 Apr 22 May 9 May 21 Apr 3 May
Worland
(1960-2021)
 Washakie 4252 APR 18 MAY 10 JUN 19 *19 Jun 29 Apr 15 May 11 May 8 May 10 May
Buffalo
(1899-2021)
 Johnson 4670 APR 30 MAY 21 JUL 1 M 30 Apr M 10 May 10 May 9 Jun
Buffalo Airport
(1999-2021)
 Johnson 4970 APR 25 MAY 15 JUN 8 24 May 28 Apr 22 May 22 May 10 May 21 May
Kaycee
(1949-2021)
 Johnson 4660 MAY 1 MAY 24 JUL 5 23 May 2 May 23 May 13 May 25 May 24 May
Moose
(1958-2021)
 Teton 6470

MAY 12

 JUL 2 JUL 31 M 12 May 21 Jun 12 Jun 10 Jun 22 May
Dubois
(1907-2019)
 Fremont 6955 MAY 23 JUN 26 JUL 31 5 Jul 29 Jun 14 Jun 12 Jun 19 Jun 22 Jun
Riverton (town)
(1907-2021)
 Fremont 4955 APR 20 MAY 21 JUL 7 24 May 28 Apr 22 May 9 May 24 May 22 May
Fremont 5528 MAY 1 MAY 17 JUN 4 24 May 28 Apr 12 May 12 May 24 May 22 May
Lander (town)
(1999-2021)
 Fremont 5320 MAY 4 MAY 22 JUN 19 24 May 8 May M 10 May 24 May 10 Jun
Lander Hunt Field
(1891-2021)
 Fremont 5587 APR 21 MAY 19 JUL 3 24 May 21 Apr 22 May 10 May 11 May 9 Jun
Jeffrey City
(1964-2021)
 Fremont 6320 MAY 11 MAY 31 JUL 8 1 Jun 11 May 1 Jun 13 May 26 May 10 Jun
Casper Airport
(1939-2021)
 Natrona 5350 APR 25 MAY 22 JUL 4 27 May 10 May 25 May 27 May 18 Jun 10 Jun
Bedford 3 SE
(1975-2021)
 Lincoln 6425 MAY 29 JUN 25 JUL 31 4 Jul 22 Jun 22 Jun 12 Jun 10 Jun 23 Jun
Pinedale
(1948-2021)
 Sublette 7195 JUN 11 JUL 3 JUL 31 19 Jun 31 May 28 Jun 12 Jun 19 Jun 25 Jun
Big Piney Apt.
(1998-2021)
 Sublette 6994 JUN 9 JUN 25 JUL 29 3 Jul 17 May 28 Jun 12 Jun 15 Jul 29 Jun
Fossil Butte
(1990-2021)
 Lincoln 6780 JUN 13 JUL 4 JUL 31 3 Jul 24 Jun 1 Jul 13 Jun 15 Jul 29 Jun
Green River
(1905-2021)
 Sweetwater 6077 MAY 2 JUN 3 JUL 31 25 May 29 Apr 25 May 12 May 24 May 10 Jun
Rock Springs Apt.
(1948-2021)
 Sweetwater 6765 MAY 1 MAY 28 JUN 30 24 May 7 May 12 May 12 May 24 May 9 Jun
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Last updated on July 26, 2024

*Clark 3NE and Worland Airport have new records for Latest last freeze date in 2024.


MMM DD = Tmin > 32°F during the past 14 days  |  MMM DD = Tmin <= 32°F during the past 14 days

MMM DD = Record for latest last freeze date.
MMM DD = Record for earliest last freeze date.

 

Median Start of Greenup Date for All Vegetation
 
 
 
Median Start of Greenup Date for All Vegetation - Click to Enlarge
 
td>
Growing Season Data
Location County Elev. (ft) Longest Growing Season
Average Growing Season (Days)
Shortest Growing Season 2024   2023 2022 2021 2020

Clark 3 NE
(1961-2021)

 Park 4090
150 (2013)
116
71 (1976)
 94  
149
 135
113
123
Deaver
(1916-2021)
 Big Horn 4105
165 (2017, 2018)
124
86 (1992)
 103  
160
 138
157
123
Thermopolis
(1899-2021)
 Hot Springs 4315
181 (2007)
128

65 (1938)

 142  
178
 144
143
139
Worland
(1960-2021)
 Washakie 4245
176 (1989)
140
102 (1974 ) 
 94  
160
 114
132
122
Buffalo
(1899-2020)
 Johnson 4670
156 (1998)
120
57 (1904)
 M   153 M
M
120
Kaycee
(1949-2021)
 Johnson 4975
147 (2015)
113
56 (1904)
 135   157 138
131
105
Moose
(1958-2021)
 Teton 6470
104 (1961)
51
0 (1995)
 125  
80
 77
89
82
Dubois
(1907-2021)
 Fremont 6955
111 (2017) 
61
0 (1995)
 53  
86
 88
83
80
Riverton
(1907-2021)
 Fremont 4950
159 (1998)
119
67 (1989)
 129  
161
 138
134
106
Lander (town)
(1999-2020)
 Fremont 5320
139 (2018)
102
81 (2000, 2005)
 122  
137
 M
M
118
Lander Apt.
(1891-2021)
 Fremont 5585
170 (1987)
122
57 (1904)
 129  
168
 146
133
118
Jeffrey City
(1964-2021)
 Fremont 6320
130 (2021)
 101
53 (1985, 1993)
 103  
135
 104
130
96
Casper Apt.
(1939-2021)
 Natrona 5320
165 (1963)
121
78 (1972)
 109  
148
 122
112
80
Location County Elev. (ft) Longest Growing Season
Average Growing Season (Days)
Shortest Growing Season 2024   2023 2022 2021 2020
Afton
(1957-2021)
 Lincoln 6245  111 (2017) 56 8 (2015) 70   92 67 83 82
Bedford 3 SE
(1975-2021)
 Lincoln 6425
109 (1990)
63
5(2000)
 55  
93
 79
77
82
Boulder Rearing Station
(1989-2021)
 Sublette 6940
86 (2013)
53
19 (2016)
 59  
69
 81
58
72
Big Piney
(1998-2021)
 Sublette 6975
87 (2013)
58
2 (1987)
 54  
105
 57
58
 46
Fossil Butte
(1990-2021)
 Lincoln 6780
89 (2013)
50
0 (1995)
 52  
67
 73
74
31
Green River
(1905-2021)
 Sweetwater 6130
149 (2015)
100

45 (1968)

 146  
147
 141
131
106
Rock Springs Apt.
(1948-2021)
 Sweetwater 6760
155 (1963)
116
73 (1973)

146

  
152
 136
131
105

Updated 5 December 2024 

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

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