Fall First Freeze Information

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Significant Snow over the far West Tuesday Night; Strong Wind over the East & South late Tuesday and Wednesday

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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

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Midwestern Regional Climate Center Graphics

Greatest Consecutive Hours <= 32°F: Last 7 Days

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

Night 4 Lows	Night 5 Lows	Night 6 Lows

Night 7 Lows	6 - 10 Day Outlook	8 - 14 Day Outlook

More Information More Temperature and Precipitation Outlooks
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Climatological First Freeze Data

Location

County

Elev.
(ft)

Early

Average

Late

2018
33F-36F

2018
29F-32F

2018
<=28F

2017
<=32F

2016
<=32F

2015
<=32F

2014
<=32F

Clark 3NE
(1961-2018)

Park

4090

AUG 23
(2015)

SEP 17

OCT 15
(1963)

SEP 21

SEP 25

SEP 26

SEP 17

OCT 5

AUG 23

SEP 12

Cody Airport
(1915-2018)

Park

5100

AUG 21
(1945)

SEP 22

NOV 1
(1940)

SEP 25

SEP 25

OCT 8

SEP 22

OCT 5

OCT 28

SEP 11

(1916-2018)

Big Horn

4105

AUG 26
(1992)

SEP 19

OCT 17
(2015)

SEP 22

OCT 2

OCT 12

OCT 4

OCT 11

OCT 17

SEP 12

Greybull Airport

(1999-2018)

Big Horn

3935

SEP 12
(2014)

OCT 1

OCT 18
(2011)

SEP 25

SEP 26

OCT 11

OCT 4

OCT 11

OCT 16

SEP 12

Thermopolis
(1899-2018)

Hot Springs

4315

AUG 15
(1938)

SEP 22

OCT 19
(2007)

SEP 21

SEP 29

OCT 12

OCT 3

OCT 7

OCT 16

SEP 12

Worland Airport
(1960-2018)

Washakie

4245

SEP 2
(1974)

SEP 28

OCT 18
(1989)

SEP 21

SEP 21

SEP 26

SEP 20

OCT 6

OCT 12

SEP 12

Buffalo
(1899-2018)

Johnson

4670

AUG 15
(2012)

SEP 19

OCT 17
(1963)

SEP 25

SEP 25

OCT 6

SEP 20

OCT 5

OCT 12

SEP 11

Buffalo Airport
(1999-2018)

Johnson

4970

SEP 10
(2014)

OCT 1

OCT 19
(2011)

SEP 25

SEP 28

OCT 11

OCT 3

OCT 5

OCT 16

SEP 10

Kaycee
(1949-2018)

Johnson

4975

AUG 20
(1964)

SEP 16

OCT 16
(2015)

SEP 25

SEP 26

OCT 12

SEP 26

OCT 12

OCT 16

SEP 11

Moose
(1958-2018)

Teton

6470

AUG 1
(1995)

AUG 21

SEP 23
(1998)

AUG 24

AUG 29

SEP 21

SEP 17

AUG 3

AUG 23

AUG 2

Dubois
(1907-2018)

Fremont

6955

AUG 1
(1927)

AUG 26

SEP 21
(1990)

AUG 31

SEP 1

SEP 21

SEP 17

AUG 24

AUG 23

SEP 4

Riverton
(1907-2018)

Fremont

4950

AUG 7
(1912)

SEP 16

OCT 12
(2015)

SEP 21

SEP 25

SEP 26

SEP 26

OCT 5

OCT 12

SEP 12

Lander (town)
(1999-2018)

Fremont

5320

AUG 31
(2005)

SEP 15

SEP 20
(2017)

SEP 21

SEP 21

SEP 25

SEP 20

SEP 10

SEP 18

SEP 13

Lander Hunt Field
(1891-2018)

Fremont

5585

AUG 22
(1904)

SEP 21

OCT 25
(2010)

SEP 25

SEP 26

OCT 11

OCT 1

OCT 5

OCT 22

SEP 12

Jeffrey City
(1964-2018)

Fremont

6320

AUG 10
(2014)

SEP 10

OCT 5
(2001)

AUG 29

AUG 29

SEP 21

SEP 17

SEP 10

AUG 23

AUG 10

Casper Airport
(1939-2018)

Natrona

5320

AUG 23
(2015)

SEP 21

OCT 28
(1940)

SEP 21

SEP 21

SEP 25

SEP 27

SEP 10

AUG 23

SEP 12

Location

County

Elev.
(ft)

Early

Average

Late

2018
33F-36F

2018
29F-32F

2018
<=28F

2017
<=32F

2016
<=32F

2015
<=32F

2014
<=32F

Afton
(1957-2018)

Lincoln

6245

AUG 2
(1975)

AUG 24

SEP 24
(1963)

AUG 29

AUG 29

SEP 21

SEP 17

AUG 24

AUG 6

SEP 4

Bedford 3 SE
(1975-2018)

Lincoln

6425

AUG 1
(2000)

AUG 26

OCT 2
(1990)

AUG 7

SEP 4

SEP 21

AUG 22

AUG 4

AUG 23

SEP 4

Boulder Rearing Station
(1989-2018)

Sublette

6940

AUG 1
(1995)

AUG 21

SEP 19
(2013)

AUG 6

AUG 24

AUG 29

AUG 19

AUG 4

AUG 21

SEP 1

Big Piney Airport
(1998-2018)

Sublette

6975

AUG 4
(2016)

AUG 25

SEP 19
(2013)

AUG 6

AUG 28

AUG 29

AUG 16

AUG 4

AUG 23

SEP 1

Fossil Butte
(1990-2018)

Lincoln

6780

AUG 1
(1995)

AUG 25

SEP 19
(2013)

AUG 6

AUG 26

AUG 29

SEP 16

AUG 4

AUG 20

SEP 1

Green River
(1905-2018)

Sweetwater

6130

AUG 4
(1980)

SEP 10

OCT 23
(2015)

SEP 21

SEP 25

OCT 11

SEP 17

OCT 6

OCT 23

SEP 12

Rock Springs Apt.
(1948-2018)

Sweetwater

6760

SEP 1
(1973)

SEP 22

OCT 24
(1963)

SEP 25

SEP 25

OCT 8

SEP 17

OCT 3

OCT 22

SEP 11

*Month Day* = record earliest freeze *Month Day* = Record latest freeze

*** Final Update on October 12, 2018 ***

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Growing Season Data
Location								County	Elev. (ft)	Longest Growing Season	Average Growing Season (Days)	Shortest Growing Season	2018		2017	2016	2015	2014
Clark 3 NE (1961-2018)								Park	4090	150 (2013)	116	71 (1976)	104		112	145	103	120
Deaver (1916-2018)								Big Horn	4105	165 (2017, 2018)	123	86 (1992)	165		165	150	157	120
Thermopolis (1899-2018)								Hot Springs	4315	181 (2007)	128	65 (1938)	147		156	148	157	121
Worland (1960-2018)								Washakie	4245	176 (1989)	140	102 (1974 )	146		142	135	153	120
Buffalo (1899-2018)								Johnson	4670	156 (1998)	119	57 (1904)	144		121	138	146	117
Kaycee (1949-2018)								Johnson	4975	147 (2015)	113	78 (1964)	137		126	146	147	119
Moose (1958-2018)								Teton	6470	104 (1961)	50	0 (1995)	64		78	21	24	43
Dubois (1907-2018)								Fremont	6955	111 (2017)	58	0 (1995)	80		111	83	23	77
Riverton (1907-2018)								Fremont	4950	159 (1998)	118	67 (1989)	150		130	145	153	120
Lander (town) (1999-2018)								Fremont	5320	139 (2018)	102	81 (2000, 2005)	139		119	108	124	85
Lander Apt. (1891-2018)								Fremont	5585	170 (1987)	122	57 (1904)	136		133	145	155	106
Jeffrey City (1964-2018)								Fremont	6320	127 (2009)	99	53 (1985, 1993)	105		116	113	88	55
Casper Apt. (1939-2018)								Natrona	5320	165 (1963)	121	78 (1972)	141		129	100	94	119
Location								County	Elev. (ft)	Longest Growing Season	Average Growing Season (Days)	Shortest Growing Season	2018		2017	2016	2015	2014
Afton (1957-2018)								Lincoln	6245	111 (2017)	54	8 (2015)	77		111	57	8	76
Bedford 3 SE (1975-2018)								Lincoln	6425	109 (1990)	61	8 (1995)	82		84	38	24	76
Boulder Rearing Station (1989-2018)								Sublette	6940	86 (2013)	52	19 (2016)	71		48	19	21	60
Big Piney (1998-2018)								Sublette	6975	87 (2013)	59	2 (1987)	57		52	20	24	61
Fossil Butte (1990-2018)								Lincoln	6780	89 (2013)	50	0 (1995)	55		77	21	20	61
Green River (1905-2018)								Sweetwater	6130	149 (2015)	99	45 (1968)	145		119	145	149	117
Rock Springs Apt. (1948-2018)								Sweetwater	6760	155 (1963)	116	73 (1973)	145		95	132	150	119
XX (2018) = New record set in 2018. M = missing data during the period. Growing Season = Number of Days between last Spring Freeze and first Fall freeze (<= 32°F)															Top of Page

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