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Annual Climate Summary for Central and Western Wyoming

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

2024
Last <=32°

2023

2022

2021

202

2019

Clark 3NE
(1961-2021)

Park

4090

MAY 5

MAY 23

Jun 19

*19 Jun

10 May

25 May

30 May

8 May

9 Jun

Cody
(1915-2021)

Park

5102

APR 20

MAY 18

JUN 29

24 May

28 Apr

22 May

23 May

12 May

22 May

Deaver
(1916-2021)

Big Horn

4105

APR 19

MAY 18

JUN 21

19 Jun

29 Apr

22 May

25 Apr

9 May

4 May

Greybull Airport
(1999-2021)

Big Horn

3940

APR 15

MAY 8

JUN 7

4 May

28 Apr

M

11 May

20 Apr

10 May

Thermopolis
(1899-2021)

Hot Springs

4313

APR 17

MAY 17

JUN 29

4 May

29 Apr

22 May

9 May

21 Apr

3 May

Worland
(1960-2021)

Washakie

4252

APR 18

MAY 10

JUN 19

*19 Jun

29 Apr

15 May

11 May

8 May

10 May

Buffalo
(1899-2021)

Johnson

4670

APR 30

MAY 21

JUL 1

M

30 Apr

M

10 May

10 May

9 Jun

Buffalo Airport
(1999-2021)

Johnson

4970

APR 25

MAY 15

JUN 8

24 May

28 Apr

22 May

22 May

10 May

21 May

Kaycee
(1949-2021)

Johnson

4660

MAY 1

MAY 24

JUL 5

23 May

2 May

23 May

13 May

25 May

24 May

Moose
(1958-2021)

Teton

6470

MAY 12

JUL 2

JUL 31

M

12 May

21 Jun

12 Jun

10 Jun

22 May

Dubois
(1907-2019)

Fremont

6955

MAY 23

JUN 26

JUL 31

5 Jul

29 Jun

14 Jun

12 Jun

19 Jun

22 Jun

Riverton (town)
(1907-2021)

Fremont

4955

APR 20

MAY 21

JUL 7

24 May

28 Apr

22 May

9 May

24 May

22 May

Riverton Regional Apt
(1997-2021)

Fremont

5528

MAY 1

MAY 17

JUN 4

24 May

28 Apr

12 May

12 May

24 May

22 May

Lander (town)
(1999-2021)

Fremont

5320

MAY 4

MAY 22

JUN 19

24 May

8 May

M

10 May

24 May

10 Jun

Lander Hunt Field
(1891-2021)

Fremont

5587

APR 21

MAY 19

JUL 3

24 May

21 Apr

22 May

10 May

11 May

9 Jun

Jeffrey City
(1964-2021)

Fremont

6320

MAY 11

MAY 31

JUL 8

1 Jun

11 May

1 Jun

13 May

26 May

10 Jun

Casper Airport
(1939-2021)

Natrona

5350

APR 25

MAY 22

JUL 4

27 May

10 May

25 May

27 May

18 Jun

10 Jun

Bedford 3 SE
(1975-2021)

Lincoln

6425

MAY 29

JUN 25

JUL 31

4 Jul

22 Jun

22 Jun

12 Jun

10 Jun

23 Jun

Pinedale
(1948-2021)

Sublette

7195

JUN 11

JUL 3

JUL 31

19 Jun

31 May

28 Jun

12 Jun

19 Jun

25 Jun

Big Piney Apt.
(1998-2021)

Sublette

6994

JUN 9

JUN 25

JUL 29

3 Jul

17 May

28 Jun

12 Jun

15 Jul

29 Jun

Fossil Butte
(1990-2021)

Lincoln

6780

JUN 13

JUL 4

JUL 31

3 Jul

24 Jun

1 Jul

13 Jun

15 Jul

29 Jun

Green River
(1905-2021)

Sweetwater

6077

MAY 2

JUN 3

JUL 31

25 May

29 Apr

25 May

12 May

24 May

10 Jun

Rock Springs Apt.
(1948-2021)

Sweetwater

6765

MAY 1

MAY 28

JUN 30

24 May

7 May

12 May

12 May

24 May

9 Jun

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Last updated on July 26, 2024

*Clark 3NE and Worland Airport have new records for Latest last freeze date in 2024.

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

td>

Growing Season Data
Location								County	Elev. (ft)	Longest Growing Season	Average Growing Season (Days)	Shortest Growing Season	2024		2023	2022	2021	2020
Clark 3 NE (1961-2021)								Park	4090	150 (2013)	116	71 (1976)	94		149	135	113	123
Deaver (1916-2021)								Big Horn	4105	165 (2017, 2018)	124	86 (1992)	103		160	138	157	123
Thermopolis (1899-2021)								Hot Springs	4315	181 (2007)	128	65 (1938)	142		178	144	143	139
Worland (1960-2021)								Washakie	4245	176 (1989)	140	102 (1974 )	94		160	114	132	122
Buffalo (1899-2020)								Johnson	4670	156 (1998)	120	57 (1904)	M		153	M	M	120
Kaycee (1949-2021)								Johnson	4975	147 (2015)	113	56 (1904)	135		157	138	131	105
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)	53		86	88	83	80
Riverton (1907-2021)								Fremont	4950	159 (1998)	119	67 (1989)	129		161	138	134	106
Lander (town) (1999-2020)								Fremont	5320	139 (2018)	102	81 (2000, 2005)	122		137	M	M	118
Lander Apt. (1891-2021)								Fremont	5585	170 (1987)	122	57 (1904)	129		168	146	133	118
Jeffrey City (1964-2021)								Fremont	6320	130 (2021)	101	53 (1985, 1993)	103		135	104	130	96
Casper Apt. (1939-2021)								Natrona	5320	165 (1963)	121	78 (1972)	109		148	122	112	80
Location								County	Elev. (ft)	Longest Growing Season	Average Growing Season (Days)	Shortest Growing Season	2024		2023	2022	2021	2020
Afton (1957-2021)								Lincoln	6245	111 (2017)	56	8 (2015)	70		92	67	83	82
Bedford 3 SE (1975-2021)								Lincoln	6425	109 (1990)	63	5(2000)	55		93	79	77	82
Boulder Rearing Station (1989-2021)								Sublette	6940	86 (2013)	53	19 (2016)	59		69	81	58	72
Big Piney (1998-2021)								Sublette	6975	87 (2013)	58	2 (1987)	54		105	57	58	46
Fossil Butte (1990-2021)								Lincoln	6780	89 (2013)	50	0 (1995)	52		67	73	74	31
Green River (1905-2021)								Sweetwater	6130	149 (2015)	100	45 (1968)	146		147	141	131	106
Rock Springs Apt. (1948-2021)								Sweetwater	6760	155 (1963)	116	73 (1973)	146		152	136	131	105
Updated 5 December 2024 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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