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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

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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 More Temperature and Precipitation Outlooks
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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

Riverton Regional Apt
(1997-2021)

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

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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)															Top of Page

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