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Southwest Idaho And Southeast Oregon Freeze Data
 
Table lists the average freeze date from 1981 through 2010. For the spring, the average last freeze date is given. For the fall, the average first freeze date is given. Freeze date probabilities for each city available here.
 
A hard freeze is when temperatures reach or fall below 28 F.
A freeze is when temperatures reach or fall below 32 F.
   
SPRING
FALL
 
36 F
32 F
28 F
24 F
Boise
May 20
May 8
April 19
March 19
Nampa
May 22
May 3
April 12
March 20
Emmett
May 19
May 5
April 13
March 21
Payette
May 13
May 3
April 13
March 30
Parma
May 19
May 2
April 14
March 26
Nyssa
May 14
April 22
April 5
March 16
Vale, Oregon
June 1
May 13
April 25
April 9
Grand View
May 16
May 3
April 18
March 31
Glenns Ferry
June 2
May 13
May 3
April 19
Twin Falls
June 3
May 11
April 30
April 10
Jerome
May 27
May 12
April 23
April 2
 
36 F
32 F
28 F
24 F
Boise
Sept. 25
Oct. 10
Oct. 23
Nov. 6
Nampa
Sept. 24
Oct. 12
Oct. 22
Nov. 5
Emmett
Sept. 27
Oct. 11
Oct. 22
Nov. 4
Payette
Sept. 28
Oct. 10
Oct. 20
Nov. 1
Parma
Sept. 20
Oct. 1
Oct. 14
Oct. 29
Nyssa
Oct. 1
Oct. 11
Oct. 25
Nov. 8
Vale, Oregon
Sept. 16
Sept. 26
Oct. 8
Oct. 21
Grand View
Sept. 19
Oct. 4
Oct. 14
Oct. 27
Glenns Ferry
Sept. 9
Sept. 22
Oct. 8
Oct. 22
Twin Falls
Sept. 12
Sept. 24
Oct. 10
Oct. 26
Jerome
Sept. 21
Oct. 4
Oct. 17
Oct. 29

 

Updated: 04/30/2013


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