Southwest Idaho and Southeast Oregon Freeze Data

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	June 1	May 10	April 24	March 15
Nampa	May 25	May 6	April 15	March 21
Emmett	May 17	May 6	April 15	March 19
Payette	May 13	May 3	April 13	March 30
Parma	May 16	May 4	April 14	March 28
Nyssa	May 9	April 24	April 7	March 16
Vale, Oregon	June 1	May 10	April 24	April 12
Grand View	May 16	May 7	April 16	April 7
Glenns Ferry	May 31	May 13	May 3	April 17
Twin Falls	June 5	May 10	May 1	April 13

	36 F	32 F	28 F	24 F
Boise	Sept. 23	Oct. 8	Oct. 25	Nov. 3
Nampa	Sept. 24	Oct. 11	Oct. 24	Nov. 8
Emmett	Sept. 30	Oct. 12	Oct. 26	Nov. 1
Payette	Sept. 28	Oct. 10	Oct. 20	Nov. 1
Parma	Sept. 21	Oct. 3	Oct. 16	Oct. 30
Nyssa	Oct. 1	Oct. 12	Oct. 25	Nov. 10
Vale, Oregon	Sept. 16	Sept. 24	Oct. 9	Oct. 20
Grand View	Sept. 19	Oct. 5	Oct. 13	Oct. 26
Glenns Ferry	Sept. 10	Sept. 22	Oct. 9	Oct. 23
Twin Falls	Sept. 13	Sept. 24	Oct. 10	Oct. 25