National Weather Service United States Department of Commerce

Strong Storm for the West and Southwest; Heavy Snow for the Northern Plains and Upper Midwest

A strong storm will move ashore across California today accompanied by strong winds, heavy rain and heavy snow for the higher terrain. Flooding will be of great concern for Southern California into portions of Arizona through Wednesday. Several feet of snow is expected across central and southern California Mountains into the central Great Basin. Snow will impact the northern Plains into tonight. Read More >

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 2022
Last  <=32°		 2021 2020 2019 2018 2017

Clark 3NE
(1961-2021)

 Park 4090 MAY 5 MAY 23 JUN 18 25 MAY 30 MAY 8 MAY 9 JUN 12 JUN 27 MAY
Cody
(1915-2021)		 Park 5102 APR 20 MAY 17 JUN 29 22 MAY 23 MAY 12 MAY 22 MAY 25 APR 30 APR
Deaver
(1916-2021)
 Big Horn 4105 APR 19 MAY 18 JUN 21 22 MAY 25 APR 9 MAY 4 MAY 19 APR 21 APR
Greybull Airport
(1999-2021)		 Big Horn 3940 APR 15 MAY 9 JUN 7 M 11 MAY 20 APR 10 MAY 25 APR 30 APR
Thermopolis
(1899-2021)
 Hot Springs 4313 APR 17 MAY 17 JUN 29 22 MAY 9 MAY 21 APR 3 MAY 1 MAY 29 APR
Worland
(1960-2021)
 Washakie 4252 APR 18 MAY 10 JUN 12 15 MAY 11 MAY 8 MAY 10 MAY 27 APR 30 APR
Buffalo
(1899-2021)
 Johnson 4670 APR 30 MAY 21 JUL 1 M 10 MAY 10 MAY 9 JUN 30 MAY 21 MAY
Buffalo Airport
(1999-2021)
 Johnson 4970 APR 25 MAY 15 JUN 8 22 MAY 22 MAY 10 MAY 21 MAY 25 APR 30 APR
Kaycee
(1949-2021)
 Johnson 4660 MAY 1 MAY 25 JUL 5 23 MAY 13 MAY 25 MAY 24 MAY 25 JUN 30 JUN
Moose
(1958-2021)
 Teton 6470 MAY 21 JUL 2 JUL 31 21 JUN 12 JUN 10 JUN 22 MAY 25 JUN 30 JUN
Dubois
(1907-2019)
 Fremont 6955 MAY 23 JUN 26 JUL 31 14 JUN 12 JUN 19 JUN 22 JUN 12 JUN 28 MAY
Riverton (town)
(1907-2021)
 Fremont 4955 APR 20 MAY 21 JUL 7 22 MAY 9 MAY 24 MAY 22 MAY 27 APR 18 MAY
Fremont 5528 MAY 1 MAY 17 JUN 4 12 MAY 12 MAY 24 MAY 22 MAY 1 MAY 18 MAY
Lander (town)
(1999-2021)
 Fremont 5320 MAY 4 MAY 24 JUN 19 M 10 MAY 24 MAY 10 JUN 4 MAY 23 MAY
Lander Hunt Field
(1891-2021)
 Fremont 5587 APR 21 MAY 19 JUL 3 22 MAY 10 MAY 11 MAY 9 JUN 12 MAY 20 MAY
Jeffrey City
(1964-2021)
 Fremont 6320 MAY 10 JUN 1 JUL 8 1 JUN 13 MAY 26 MAY 10 JUN 2 MAY 20 MAY
Casper Airport
(1939-2021)
 Natrona 5350 APR 25 MAY 22 JUL 4 25 MAY 27 MAY 18 JUN 10 JUN 2 MAY 20 MAY
Bedford 3 SE
(1975-2021)
 Lincoln 6425 MAY 29 JUN 26 JUL 31 22 JUN 12 JUN 10 JUN 23 JUN 13 JUN 29 MAY
Pinedale
(1948-2021)
 Sublette 7195 JUN 11 JUL 4 JUL 31 28 JUN 12 JUN 19 JUN 25 JUN 1 JUL 14 JUN
Big Piney Apt.
(1998-2021)
 Sublette 6994 JUN 9 JUN 27 JUL 29 28 JUN 12 JUN 15 JUL 25 JUN 1 JUL 30 JUN
Fossil Butte
(1990-2021)
 Lincoln 6780 JUN 20 JUL 5 JUL 31 1 JUL 13 JUN 15 JUL 29 JUN 1 JUL 30 JUN
Green River
(1905-2021)
 Sweetwater 6077 MAY 2 JUN 3 JUL 31 25 MAY 12 MAY 24 MAY 10 JUN 2 MAY 20 MAY
Rock Springs Apt.
(1948-2021)
 Sweetwater 6765 MAY 1 MAY 28 JUN 30 12 MAY 12 MAY 24 MAY 9 JUN 2 MAY 13 JUN
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Last updated on November 25, 2022


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 2022   2021 2020 2019 2018

Clark 3 NE
(1961-2021)

 Park 4090
150 (2013)
116
71 (1976)
 135  
113
 123
112
104
Deaver
(1916-2021)
 Big Horn 4105
165 (2017, 2018)
124
86 (1992)
 138  
157
 123
151
165
Thermopolis
(1899-2021)
 Hot Springs 4315
181 (2007)
128

65 (1938)

 144  
143
 139
152
147
Worland
(1960-2021)
 Washakie 4245
176 (1989)
140
102 (1974 ) 
 114  
132
 122
144
146
Buffalo
(1899-2020)
 Johnson 4670
156 (1998)
120
57 (1904)
 M   M 120
113
144
Kaycee
(1949-2021)
 Johnson 4975
147 (2015)
113
56 (1904)
 128   131 105
130
82
Moose
(1958-2021)
 Teton 6470
104 (1961)
51
0 (1995)
 80  
77
 89
82
64
Dubois
(1907-2021)
 Fremont 6955
111 (2017) 
61
0 (1995)
 88  
83
 80
87
80

 
Riverton
(1907-2021)
 Fremont 4950
159 (1998)
119
67 (1989)
 138  
134
 106
133
150
Lander (town)
(1999-2020)
 Fremont 5320
139 (2018)
102
81 (2000, 2005)
 M  
M
 118
114
136
Lander Apt.
(1891-2021)
 Fremont 5585
170 (1987)
122
57 (1904)
 146  
133
 118
114
136
Jeffrey City
(1964-2021)
 Fremont 6320
130 (2021)
 101
53 (1985, 1993)
 104  
130
 96
99
105
Casper Apt.
(1939-2021)
 Natrona 5320
165 (1963)
121
78 (1972)
 122  
112
 80
113
141
Location County Elev. (ft) Longest Growing Season
Average Growing Season (Days)
Shortest Growing Season 2021   2020 2019 2018 2017
Afton
(1957-2021)
 Lincoln 6245  111 (2017) 56 8 (2015) 67   83 82 65 77
Bedford 3 SE
(1975-2021)
 Lincoln 6425
109 (1990)
63
5(2000)
 79  
77
 82
86
82
Boulder Rearing Station
(1989-2021)
 Sublette 6940
86 (2013)
53
19 (2016)
 81  
58
 72
52
71
Big Piney
(1998-2021)
 Sublette 6975
87 (2013)
58
2 (1987)
 57  
58
 46
48
 57
Fossil Butte
(1990-2021)
 Lincoln 6780
89 (2013)
50
0 (1995)
 73  
74
 31
44
55
Green River
(1905-2021)
 Sweetwater 6130
149 (2015)
100
45 (1968)
 141  
131
 106
112 
145
Rock Springs Apt.
(1948-2021)
 Sweetwater 6760
155 (1963)
116
73 (1973)

145

  
131
 105
100
145

 

Jeffrey City (2021) = New record set in 2021.  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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