National Weather Service United States Department of Commerce

Severe Weather Threat Continues Across the Central U.S.; Critical Fire Weather Conditions in New Mexico

Severe thunderstorms will continue to be likely across the Central Plains into the Midwest on Monday. Thunderstorm development is also possible in portions of the Middle Mississippi Valley to Lower Michigan Monday afternoon. Gusty winds and low humidity will lead to critical fire weather conditions Monday across western New Mexico into southeastern Arizona. Read More >

Fall First Freeze Information
Current Freeze Watches  Quick Jumps Current Freeze Warnings
MRCC's First Freeze Graphics  Climatological First Freeze Graphics  7 Day Minimum Temperature Forecast Freeze Data for Specific Cities  Growing Season Data for Specific Cities
 
Click on Images to Enlarge

 


Midwestern Regional Climate Center Graphics
 
Lowest Minimum Temperature -38F to 10F
 

Midwestern Regional Climate 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 Climate 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

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Climatological First Freeze Data

Location

County

Elev.
(ft)

 

Early

Average

Late

 

2023
 33F-36F

2023
29F-32F

2023
<=28F

 

2022
<=32F

2021
<=32F

2020
<=32F

2019
<=32F

Clark 3NE
(1961-2021)
Park 4090   AUG 23
(2015)
SEP 17 OCT 15
(1963)
  24 SEP 7 OCT 25 OCT   8 OCT 21 SEP 9 SEP 30 SEP
Cody Airport
(1915-2021)
Park 5100   AUG 21
(1945)
SEP 22 NOV 1
(1940)
  6 OCT 25 OCT 25 OCT   17 OCT 11 OCT 7 SEP 29 SEP
(1916-2021)
Big Horn 4105   AUG 26
(1992)
SEP 19 OCT 17
(2015)
  24 SEP 7 OCT 25 OCT   8 OCT 30 SEP 10 SEP 3 OCT
(1999-2021)
Big Horn 3935  

SEP 9
(2020)

SEP 30 OCT 18
(2011)
  7 OCT 13 OCT 25 OCT   12 OCT 21 SEP 9 SEP 3 OCT
Thermopolis
(1899-2021)
Hot Springs 4315   AUG 15
(1938)
SEP 22 OCT 19
(2007)
  7 OCT 25 OCT 26 OCT   14 OCT 30 SEP 8 SEP 3 OCT
Worland Airport
(1960-2021)
Washakie 4245   SEP 2
(1974)
SEP 28 OCT 18
(1989)
  25 SEP 7 OCT 25 OCT   8 OCT 21 SEP 8 SEP 2 OCT
Buffalo
(1899-2020)
Johnson 4670   AUG 15
(2012)
SEP 19 OCT 17
(1963)
  M M M   16 OCT M 8 SEP 2 OCT
Buffalo Airport
(1999-2021)
Johnson 4970   SEP 8
(2020)
SEP 30 OCT 19
(2011)
  6 OCT 14 OCT 25 OCT   23 OCT 11 OCT 8 SEP 1 OCT
Kaycee
(1949-2021)
Johnson 4975   AUG 20
(1964)
SEP 16 OCT 16
(2015)
  4 OCT 7 OCT 26 OCT   9 OCT 22 SEP 8 SEP 1 OCT
Moose
(1958-2021)
Teton 6470   AUG 1
(1995)
AUG 22 SEP 23
(1998)
  14 SEP 15 SEP 13 OCT   10 SEP 29 AUG 8 SEP 2 OCT
Dubois
(1907-2021)
Fremont 6955   AUG 1
(1927)
AUG 26 SEP 21
(1990)
  11 SEP

24 SEP

7 OCT   11 SEP 4 SEP 8 SEP 18 SEP
Riverton
(1907-2021)
Fremont 4950   AUG 7
(1912)
SEP 17 OCT 12
(2015)
  7 OCT 7 OCT 26 OCT   8 OCT 21 SEP 8 SEP 3 OCT
Lander (town)
(1999-2020)
Fremont 5320   AUG 31
(2005)
SEP 15 SEP 20
(2017)
  23 SEP 23 SEP 14 OCT   M M 7 SEP 2 OCT
Lander Hunt Field
(1891-2021)
Fremont 5585   AUG 22
(1904)
SEP 25 OCT 25
(2010)
  23 SEP 14 OCT 25 OCT   16 OCT 21 SEP 7 SEP 2 OCT
Jeffrey City
(1964-2021)
Fremont 6320   AUG 10
(2014)
SEP 10 OCT 5
(2001)
  11 SEP 24 SEP 26 SEP   14 SEP 21 SEP 31 AUG 18 SEP
Casper Airport
(1939-2021)
Natrona 5320   AUG 23
(2015)
SEP 20 OCT 28
(1940)
  24 SEP 6 OCT 7 OCT   25 SEP 17 SEP 7 SEP 2 OCT

Location

County

Elev.
(ft)

 

Early    

Average

Late 

 

2023
33F-36F

2023
29F-32F

2023
<=28F

 

2022
<=32F

2021
<=32F

2020
<=32F

2019
<=32F

Afton
(1957-2021)
Lincoln 6245   AUG 2
(1975)
AUG 25 SEP 24
(1963)
  31 AUG 23 SEP 24 SEP   2 SEP 4 SEP 31 AUG 27 AUG
Bedford 3 SE
(1975-2021)
Lincoln 6425   AUG 1
(2000)
AUG 27 OCT 2
(1990)
  31 AUG 1 SEP 25 SEP   10 SEP 29 AUG 1 SEP 18 SEP
Sublette 6940   AUG 1
(1995)
AUG 21 SEP 19
(2013)
  31 AUG 31 AUG 24 SEP   9 SEP 10 AUG 30 AUG 17 AUG
Big Piney Airport
(1998-2021)
Sublette 6975   AUG 4
(2016)
AUG 24 SEP 19
(2013)
  31 AUG 31 AUG 24 SEP   10 SEP 10 AUG 31 AUG 13 AUG
Fossil Butte
(1990-2021)
Lincoln 6780   AUG 1
(1995)
AUG 24 SEP 19
(2013)
  31 AUG 31 AUG 23 SEP   13 SEP 27 AUG 16 AUG 13 AUG
Green River
(1905-2021)
Sweetwater 6130   AUG 4
(1980)
SEP 11 OCT 23
(2015)
  23 SEP 24 SEP 27 OCT   14 OCT 21 SEP 8 SEP 1 OCT
Rock Springs Apt.
(1948-2021)
Sweetwater 6760   SEP 1
(1973)
SEP 21 OCT 24
(1963)
  23 SEP 7 OCT 26 OCT   5 OCT 21 SEP 7 SEP 18 SEP
*Month Day* = record earliest freeze    *Month Day* = Record latest freeze

*** Data Updated on December 6, 2023 ***

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td>
Growing Season Data
Location County Elev. (ft) Longest Growing Season
Average Growing Season (Days)
Shortest Growing Season 2023   2022 2021 2020 2019

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
127
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 2023   2022 2021 2020 2019
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
16
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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