National Weather Service United States Department of Commerce

Blizzard Conditions Over the Sierra Nevada Mountains; Critical Fire Weather in the High Plains

A significant winter storm continues to impact much of the West with heavy mountain snow and widespread damaging winds, including dangerous, blizzard conditions in the Sierra Nevada. In the Central and Southern High Plains, an expansive area of warm, dry, and windy conditions is leading to a large area of elevated to high-end critical fire-weather conditions. Read More >

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 2023
Last  <=32°
2022 2021 2020 2019 2018

Clark 3NE
(1961-2021)

Park 4090 MAY 5 MAY 23 JUN 18 10 MAY 25 MAY 30 MAY 8 MAY 9 JUN 12 JUN
Cody
(1915-2021)
Park 5102 APR 20 MAY 18 JUN 29 28 APR 22 MAY 23 MAY 12 MAY 22 MAY 25 APR
Deaver
(1916-2021)
Big Horn 4105 APR 19 MAY 18 JUN 21 29 APR 22 MAY 25 APR 9 MAY 4 MAY 19 APR
Greybull Airport
(1999-2021)
Big Horn 3940 APR 15 MAY 8 JUN 7 28 APR    M 11 MAY 20 APR 10 MAY 25 APR
Thermopolis
(1899-2021)
Hot Springs 4313 APR 17 MAY 17 JUN 29 29 APRY 22 MAY 9 MAY 21 APR 3 MAY 1 MAY
Worland
(1960-2021)
Washakie 4252 APR 18 MAY 10 JUN 12 29 APR 15 MAY 11 MAY 8 MAY 10 MAY 27 APR
Buffalo
(1899-2021)
Johnson 4670 APR 30 MAY 21 JUL 1 30 APR    M 10 MAY 10 MAY 9 JUN 30 MAY
Buffalo Airport
(1999-2021)
Johnson 4970 APR 25 MAY 15 JUN 8 28 APR 22 MAY 22 MAY 10 MAY 21 MAY 25 APR
Kaycee
(1949-2021)
Johnson 4660 MAY 1 MAY 24 JUL 5 2 MAY 23 MAY 13 MAY 25 MAY 24 MAY 5 JUL
Moose
(1958-2021)
Teton 6470

MAY 12

JUL 2 JUL 31 * 12 MAY 21 JUN 12 JUN 19 JUN 22 JUN 12 JUN
Dubois
(1907-2019)
Fremont 6955 MAY 23 JUN 26 JUL 31 29 JUN 14 JUN 12 JUN 10 JUN 22 MAY 25 JUN
Riverton (town)
(1907-2021)
Fremont 4955 APR 20 MAY 21 JUL 7 28 APR 22 MAY 9 MAY 24 MAY 27 MAY 27 APR
Fremont 5528 MAY 1 MAY 17 JUN 4 28 APR 12 MAY 12 MAY 24 MAY 22 MAY 1 MAY
Lander (town)
(1999-2021)
Fremont 5320 MAY 4 MAY 22 JUN 19 8 MAY    M 10 MAY 24 MAY 10 JUN 1 MAY
Lander Hunt Field
(1891-2021)
Fremont 5587 APR 21 MAY 19 JUL 3 21 APR 22 MAY 10 MAY 11 MAY 9 JUN 12 MAY
Jeffrey City
(1964-2021)
Fremont 6320 MAY 11 MAY 31 JUL 8 * 11 MAY 1 JUN 13 MAY 26 MAY 10 JUN 15 MAY
Casper Airport
(1939-2021)
Natrona 5350 APR 25 MAY 22 JUL 4 10 MAY 25 MAY 27 MAY 18 JUN 10 JUN 2 MAY
Bedford 3 SE
(1975-2021)
Lincoln 6425 MAY 29 JUN 25 JUL 31 22 JUN 22 JUN 12 JUN 10 JUN 23 JUN 13 JUN
Pinedale
(1948-2021)
Sublette 7195 JUN 11 JUL 3 JUL 31 31 MAY 28 JUN 12 JUN 19 JUN 25 JUN 1 JUL
Big Piney Apt.
(1998-2021)
Sublette 6994 JUN 9 JUN 25 JUL 29 17 MAY 28 JUN 12 JUN 15 JUL 25 JUN 1 JUL
Fossil Butte
(1990-2021)
Lincoln 6780 JUN 13 JUL 4 JUL 31 24 JUN 1 JUL 13 JUN 15 JUL 29 JUN 1 JUL
Green River
(1905-2021)
Sweetwater 6077 MAY 2 JUN 3 JUL 31 29 APR 25 MAY 12 MAY 24 MYA 10 JUN 2 MAY
Rock Springs Apt.
(1948-2021)
Sweetwater 6765 MAY 1 MAY 28 JUN 30 7 MAY 12 MAY 12 MAY 24 MAY 9 JUN 2 MAY
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Last updated on December 6th, 2023

*Moose and Jeffrey City have new records for Earliest last freeze date in 2023.


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
 
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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)
149  
135
113
123
112
Deaver
(1916-2021)
Big Horn 4105
165 (2017, 2018)
124
86 (1992)
160  
138
157
123
151 
Thermopolis
(1899-2021)
Hot Springs 4315
181 (2007)
128

65 (1938)

178  
144
143
139
152
Worland
(1960-2021)
Washakie 4245
176 (1989)
140
102 (1974 ) 
160  
114
132
122
144
Buffalo
(1899-2020)
Johnson 4670
156 (1998)
120
57 (1904)
153   m m
120
113
Kaycee
(1949-2021)
Johnson 4975
147 (2015)
113
56 (1904)
157   128 131
105
130
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)
86  
88
83
80
87
Riverton
(1907-2021)
Fremont 4950
159 (1998)
119
67 (1989)
161  
138
134
106
133
Lander (town)
(1999-2020)
Fremont 5320
139 (2018)
102
81 (2000, 2005)
137  
M
M
118
114
Lander Apt.
(1891-2021)
Fremont 5585
170 (1987)
122
57 (1904)
168  
146
133
118
114
Jeffrey City
(1964-2021)
Fremont 6320
130 (2021)
101
53 (1985, 1993)
135  
104
130
96
99
Casper Apt.
(1939-2021)
Natrona 5320
165 (1963)
121
78 (1972)
148  
122
112
80
113
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) 92   67 83 82 65
Bedford 3 SE
(1975-2021)
Lincoln 6425
109 (1990)
63
5(2000)
93  
79
77
82
86
Boulder Rearing Station
(1989-2021)
Sublette 6940
86 (2013)
53
19 (2016)
69  
81
58
72
52
Big Piney
(1998-2021)
Sublette 6975
87 (2013)
58
2 (1987)
105  
57
58
46
48
Fossil Butte
(1990-2021)
Lincoln 6780
89 (2013)
50
0 (1995)
67  
73
74
31
44
Green River
(1905-2021)
Sweetwater 6130
149 (2015)
100

45 (1968)

147  
141
131
106
112
Rock Springs Apt.
(1948-2021)
Sweetwater 6760
155 (1963)
116
73 (1973)

152

 
145
131
105
100

Kaycee, Moose, Riverton and Big Piney Airport = New record set in 2023. 

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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