National Weather Service United States Department of Commerce

Summer Heat for the West; Monsoonal Moisture Continues for Southwest and Southern Rockies

Summer heat will continue for areas of the west coast where high temperatures may approach or exceed the century mark. Monsoonal moisture along with the threat of flash flooding continues over parts of the Southwest and southern Rockies through Tuesday. Further east, a cold front is expected to bring a break to the heat as showers and thunderstorms are forecast from New England to the Gulf Coast. Read More >

Spring Last Freeze Information
Current Freeze Watches  Quick Jumps Current Freeze Warnings
MRCC's Last Freeze Graphics  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

Midwestern Regional Cimate Center Graphics

Last Freeze Data:
32° F

 
Dates of Last 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

Last Hard Freeze Data:
28° F
 
Dates of Last 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 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 2021
Last  <=32°
2020 2019 2018 2017 2016

Clark 3NE
(1961-2021)

Park 4090 MAY 5 MAY 23 JUN 18 MAY 30 MAY 8 JUN 9 JUN12 MAY 27 MAY 12
Cody
(1915-2021)
Park 5102 APR 20 MAY 17 JUN 29 MAY 23 MAY 12 MAY 22 APR 25 APR 30 MAY 12
Deaver
(1916-2021)
Big Horn 4105 APR 19 MAY 18 JUN 21 APR 25 MAY 9 MAY 4 APR 19 APR 21 MAY 12
Greybull Airport
(1999-2021)
Big Horn 3940 APR 15 MAY 9 JUN 7 MAY 11 APR 20 MAY 10 APR 25 APR 30 APR 15
Thermopolis
(1899-2021)
Hot Springs 4313 APR 17 MAY 17 JUN 29 MAY 9 APR 21 MAY 3 MAY 1 APR 29 MAY 11
Worland
(1960-2021)
Washakie 4252 APR 18 MAY 10 JUN 12 MAY 11 MAY 8 MAY 10 APR 27 APR 30 MAY 23
Buffalo
(1899-2021)
Johnson 4670 APR 30 MAY 21 JUL 1 MAY 10 MAY 10 JUN 9 MAY 30 MAY 21 MAY 19
Buffalo Airport
(1999-2021)
Johnson 4970 APR 25 MAY 15 JUN 8 MAY 222 MAY 10 MAY 21 APR 25 APR 30 MAY 13
Kaycee
(1949-2021)
Johnson 4660 MAY 1 MAY 25 JUL 5 MAY 13 MAY 25 MAY 24 JUL 5 MAY 22 MAY 18
Moose
(1958-2021)
Teton 6470 MAY 21 JUL 2 JUL 31 JUN 12 JUN 10 MAY 22 JUN 25 JUN 30 JUL 12
Dubois
(1907-2019)
Fremont 6955 MAY 23 JUN 26 JUL 31 JUN 12 JUN 19 JUN 22 JUN 12 MAY 28 JUN 1
Riverton (town)
(1907-2021)
Fremont 4955 APR 20 MAY 21 JUL 7 MAY 9 MAY 24 MAY 22 APR 27 MAY 28 MAY 12
Fremont 5528 MAY 1 MAY 17 JUN 4 MAY 12 MAY 24 MAY 22 MAY 1 MAY 18 MAY 11
Lander (town)
(1999-2021)
Fremont 5320 MAY 4 MAY 24 JUN 19 MAY 10 MAY 24 JUN 10 MAY 4 MAY 23 MAY 24
Lander Hunt Field
(1891-2021)
Fremont 5587 APR 21 MAY 19 JUL 3 MAY 10 MAY 11 JUN 9 MAY 12 MAY 20 MAY 12
Jeffrey City
(1964-2021)
Fremont 6320 MAY 10 JUN 1 JUL 8 MAY 13 MAY 26 JUN 10 MAY 15 MAY 23 MAY 19
Casper Airport
(1939-2021)
Natrona 5350 APR 25 MAY 22 JUL 4 MAY 27 JUN 18 JUN 10 MAY 2 MAY 20 JUN 1
Bedford 3 SE
(1975-2021)
Lincoln 6425 MAY 29 JUN 26 JUL 31 JUN 12 JUN 10 JUN 23 JUN 13 MAY 29 JUN 26
Pinedale
(1948-2021)
Sublette 7195 JUN 11 JUL 4 JUL 31 JUN 12 JUN 19 JUN 25 JUL 1 JUN 14 JUL 15
Big Piney Apt.
(1998-2021)
Sublette 6994 JUN 9 JUN 27 JUL 29 JUN 12 JUL 15 JUN 29 JUL 1 JUN 30 JUL 13
Fossil Butte
(1990-2021)
Lincoln 6780 JUN 20 JUL 5 JUL 31 JUN 13 JUL 15 JUN 29 JUL 1 JUN 30 JUL 13
Green River
(1905-2021)
Sweetwater 6077 MAY 2 JUN 3 JUL 31 MAY 12 MAY 24 JUN 10 MAY 2 MAY 20 MAY 13
Rock Springs Apt.
(1948-2021)
Sweetwater 6765 MAY 1 MAY 28 JUN 30 MAY 12 MAY 24 JUN 9 MAY 2 JUN 13 MAY 23
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Last updated on November 21, 2021


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 2021   2020 2019 2018 2017

Clark 3 NE
(1961-2021)

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

65 (1938)

143  
139
152
147
156
Worland
(1960-2021)
Washakie 4245
176 (1989)
140
102 (1974 )
132  
122
144
126
142
Buffalo
(1899-2020)
Johnson 4670
156 (1998)
120
57 (1904)
M  
120
113
144
121
Kaycee
(1949-2021)
Johnson 4975
147 (2015)
113
56 (1904)
131   105 130
82
126
Moose
(1958-2021)
Teton 6470
104 (1961)
51
0 (1995)
77  
89
82
64
78
Dubois
(1907-2021)
Fremont 6955
111 (2017) 
61
0 (1995)
83  
80
87
80 
111
Riverton
(1907-2021)
Fremont 4950
159 (1998)
119
67 (1989)
134  
106
133
150
130
Lander (town)
(1999-2020)
Fremont 5320
139 (2018)
102
81 (2000, 2005)
M  
118
114
139
119
Lander Apt.
(1891-2021)
Fremont 5585
170 (1987)
122
57 (1904)
118  
114
136
133
145
Jeffrey City
(1964-2021)
Fremont 6320
130 (2021)
101
53 (1985, 1993)
130  
96
99
105
116
Casper Apt.
(1939-2021)
Natrona 5320
165 (1963)
121
78 (1972)
112  
80
113
141
129
Location County Elev. (ft) Longest Growing Season
Average Growing Season (Days)
Shortest Growing Season 2020   2019 2018 2017 2016
Afton
(1957-2021)
Lincoln 6245  111 (2017) 56 8 (2015) 83   82 65 77 111
Bedford 3 SE
(1975-2021)
Lincoln 6425
109 (1990)
63
5(2000)
77  
82
86
82
84
Boulder Rearing Station
(1989-2021)
Sublette 6940
86 (2013)
53
19 (2016)
58  
72
52
71
48 
Big Piney
(1998-2021)
Sublette 6975
87 (2013)
58
2 (1987)
58  
46
48
57
52
Fossil Butte
(1990-2021)
Lincoln 6780
89 (2013)
50
0 (1995)
74  
31
44
55
77
Green River
(1905-202`)
Sweetwater 6130
149 (2015)
100
45 (1968)
131  
106
112
145
119
Rock Springs Apt.
(1948-2021)
Sweetwater 6760
155 (1963)
116
73 (1973)

131

 
105
100
145
95

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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