Lake Effect Showers Downwind of the Great Lakes through Sunday; Wet Weather Approaches the Pacific Northwest

Cooler weather returns for the northeast through Sunday where some lake effect showers are expected downwind of the Great Lakes. Meanwhile, high pressure will provide tranquil and near seasonable weather conditions for the center of the nation. A Pacific system approaches Sunday with the increase chance for wet conditions. Read More >

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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

Click on Images to Enlarge

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

2020
33F-36F

2020
29F-32F

2020
<=28F

2019
<=32F

2018
<=32F

2017
<=32F

2016
<=32F

Clark 3NE
(1961-2018)

Park

4090

AUG 23
(2015)

SEP 17

OCT 15
(1963)

SEP 1

SEP 9

SEP 9

SEP 30

SEP 25

SEP 17

OCT 5

Cody Airport
(1915-2018)

Park

5100

AUG 21
(1945)

SEP 22

NOV 1
(1940)

SEP 7

SEP 7

SEP 9

SEP 29

SEP 29

SEP 22

OCT 11

(1916-2018)

Big Horn

4105

AUG 26
(1992)

SEP 19

OCT 17
(2015)

SEP 10

SEP 10

OCT 16

OCT 3

OCT 2

OCT 4

OCT 11

Greybull Airport

(1999-2018)

Big Horn

3935

SEP 9
(2020)

SEP 30

OCT 18
(2011)

SEP 8

SEP 9

OCT 16

OCT 3

SEP 26

OCT 4

OCT 11

Thermopolis
(1899-2018)

Hot Springs

4315

AUG 15
(1938)

SEP 22

OCT 19
(2007)

SEP 8

SEP 8

OCT 15

OCT 3

SEP 26

OCT 3

OCT 7

Worland Airport
(1960-2018)

Washakie

4245

SEP 2
(1974)

SEP 28

OCT 18
(1989)

SEP 7

SEP 8

SEP 9

OCT 2

SEP 21

SEP 20

OCT 6

Buffalo
(1899-2018)

Johnson

4670

AUG 15
(2012)

SEP 19

OCT 17
(1963)

AUG 31

SEP 8

SEP 9

OCT 1

SEP 25

SEP 20

OCT 5

Buffalo Airport
(1999-2018)

Johnson

4970

SEP 8
(2020)

SEP 30

OCT 19
(2011)

SEP 7

SEP 8

SEP 9

OCT 1

SEP 28

OCT 3

OCT 5

Kaycee
(1949-2018)

Johnson

4975

AUG 20
(1964)

SEP 16

OCT 16
(2015)

SEP 8

SEP 8

SEP 9

OCT 2

SEP 26

SEP 26

OCT 12

Moose
(1958-2018)

Teton

6470

AUG 1
(1995)

AUG 22

SEP 23
(1998)

AUG 31

SEP 8

SEP 9

AUG 13

AUG 29

SEP 17

AUG 3

Dubois
(1907-2018)

Fremont

6955

AUG 1
(1927)

AUG 26

SEP 21
(1990)

AUG 31

SEP 8

SEP 8

SEP 13

AUG 29

SEP 17

AUG 3

Riverton
(1907-2018)

Fremont

4950

AUG 7
(1912)

SEP 17

OCT 12
(2015)

SEP 8

SEP 8

SEP 9

OCT 3

SEP 25

SEP 26

OCT 5

Lander (town)
(1999-2018)

Fremont

5320

AUG 31
(2005)

SEP 15

SEP 20
(2017)

SEP 7

SEP 7

SEP 8

OCT 2

SEP 21

SEP 20

SEP 10

Lander Hunt Field
(1891-2018)

Fremont

5585

AUG 22
(1904)

SEP 25

OCT 25
(2010)

SEP 7

SEP 7

SEP 8

OCT 2

SEP 26

OCT 1

OC 5

Jeffrey City
(1964-2018)

Fremont

6320

AUG 10
(2014)

SEP 10

OCT 5
(2001)

AUG 31

AUG 31

N/A

SEP 18

SEP 29

SEP 17

SEP 10

Casper Airport
(1939-2018)

Natrona

5320

AUG 23
(2015)

SEP 20

OCT 28
(1940)

AUG 31

SEP 7

SEP 9

OCT 2

SEP 21

SEP 27

SEP 10

Location

County

Elev.
(ft)

Early

Average

Late

2020
33F-36F

2020
29F-32F

2020
<=28F

2019
<=32F

2018
<=32F

2017
<=32F

2016
<=32F

Afton
(1957-2018)

Lincoln

6245

AUG 2
(1975)

AUG 25

SEP 24
(1963)

AUG 29

AUG 31

SEP 9

AUG 27

AUG 29

SEP 17

AUG 24

Bedford 3 SE
(1975-2018)

Lincoln

6425

AUG 1
(2000)

AUG 27

OCT 2
(1990)

AUG 31

SEP 1

SEP 9

SEP 18

SEP 4

AUG 22

AUG 4

Boulder Rearing Station
(1989-2018)

Sublette

6940

AUG 1
(1995)

AUG 21

SEP 19
(2013)

AUG 8

AUG 30

SEP 1

AUG 17

AUG 24

AUG 19

AUG 4

Big Piney Airport
(1998-2018)

Sublette

6975

AUG 4
(2016)

AUG 24

SEP 19
(2013)

AUG 15

AUG 31

SEP 1

AUG 13

AUG 28

AUG 22

AUG 4

Fossil Butte
(1990-2018)

Lincoln

6780

AUG 1
(1995)

AUG 24

SEP 19
(2013)

AUG 9

AUG 16

SEP 8

AUG 13

AUG 26

SEP 16

AUG 4

Green River
(1905-2018)

Sweetwater

6130

AUG 4
(1980)

SEP 11

OCT 23
(2015)

SEP 8

SEP 8

SEP 8

OCT 1

SEP 25

SEP 17

OCT 6

Rock Springs Apt.
(1948-2018)

Sweetwater

6760

SEP 1
(1973)

SEP 21

OCT 24
(1963)

SEP 7

SEP 7

SEP 8

SEP 18

SEP 25

SEP 17

OCT 3

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

*** Data Updated on February 8, 2021 ***

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Growing Season Data
Location								County	Elev. (ft)	Longest Growing Season	Average Growing Season (Days)	Shortest Growing Season	2020		2019	2018	2017	2016
Clark 3 NE (1961-2018)								Park	4090	150 (2013)	116	71 (1976)	123		112	104	112	145
Deaver (1916-2018)								Big Horn	4105	165 (2017, 2018)	123	86 (1992)	123		121	165	165	150
Thermopolis (1899-2018)								Hot Springs	4315	181 (2007)	128	65 (1938)	139		152	147	156	148
Worland (1960-2018)								Washakie	4245	176 (1989)	140	102 (1974 )	122		144	146	142	135
Buffalo (1899-2018)								Johnson	4670	156 (1998)	119	57 (1904)	120		113	144	121	138
Kaycee (1949-2018)								Johnson	4975	147 (2015)	113	56 (1904)	105		133	82	126	146
Moose (1958-2018)								Teton	6470	104 (1961)	50	0 (1995)	89		82	64	78	21
Dubois (1907-2018)								Fremont	6955	111 (2017)	58	0 (1995)	80		87	80	111	83
Riverton (1907-2018)								Fremont	4950	159 (1998)	118	67 (1989)	106		133	150	130	145
Lander (town) (1999-2018)								Fremont	5320	139 (2018)	102	81 (2000, 2005)	118		114	136	133	145
Lander Apt. (1891-2018)								Fremont	5585	170 (1987)	122	57 (1904)	118		114	136	133	145
Jeffrey City (1964-2018)								Fremont	6320	127 (2009)	99	53 (1985, 1993)	96		99	105	116	113
Casper Apt. (1939-2018)								Natrona	5320	165 (1963)	121	78 (1972)	80		113	141	129	100
Location								County	Elev. (ft)	Longest Growing Season	Average Growing Season (Days)	Shortest Growing Season	2020		2019	2018	2017	2016
Afton (1957-2018)								Lincoln	6245	111 (2017)	54	8 (2015)	82		65	77	111	57
Bedford 3 SE (1975-2018)								Lincoln	6425	109 (1990)	61	5(2000)	82		86	82	84	38
Boulder Rearing Station (1989-2018)								Sublette	6940	86 (2013)	52	19 (2016)	72		52	71	48	19
Big Piney (1998-2018)								Sublette	6975	87 (2013)	59	2 (1987)	46		48	57	52	20
Fossil Butte (1990-2018)								Lincoln	6780	89 (2013)	50	0 (1995)	31		44	55	77	21
Green River (1905-2018)								Sweetwater	6130	149 (2015)	99	45 (1968)	106		112	145	119	145
Rock Springs Apt. (1948-2018)								Sweetwater	6760	155 (1963)	116	73 (1973)	105		100	145	95	132
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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