south dakota frost dates, county by county.

Aurora County

Last spring: 04-25 · First fall: 10-14

Beadle County

Last spring: 04-27 · First fall: 10-08

Bennett County

Last spring: 05-02 · First fall: 10-12

Bon Homme County

Last spring: 04-21 · First fall: 10-17

Brookings County

Last spring: 04-28 · First fall: 10-08

Brown County

Last spring: 04-28 · First fall: 10-07

Brule County

Last spring: 04-24 · First fall: 10-17

Buffalo County

Last spring: 04-28 · First fall: 10-09

Butte County

Last spring: 04-30 · First fall: 10-11

Campbell County

Last spring: 04-30 · First fall: 10-08

Charles Mix County

Last spring: 04-20 · First fall: 10-22

Clark County

Last spring: 04-26 · First fall: 10-15

Clay County

Last spring: 04-24 · First fall: 10-11

Codington County

Last spring: 04-28 · First fall: 10-08

Corson County

Last spring: 04-30 · First fall: 10-07

Custer County

Last spring: 05-10 · First fall: 10-05

Davison County

Last spring: 04-17 · First fall: 10-21

Day County

Last spring: 04-25 · First fall: 10-16

Deuel County

Last spring: 04-29 · First fall: 10-10

Dewey County

Last spring: 04-30 · First fall: 10-07

Douglas County

Last spring: 04-21 · First fall: 10-16

Edmunds County

Last spring: 04-29 · First fall: 10-12

Fall River County

Last spring: 05-06 · First fall: 10-09

Faulk County

Last spring: 05-01 · First fall: 10-06

Grant County

Last spring: 04-25 · First fall: 10-13

Gregory County

Last spring: 04-26 · First fall: 10-13

Haakon County

Last spring: 04-29 · First fall: 10-12

Hamlin County

Last spring: 04-29 · First fall: 10-11

Hand County

Last spring: 04-24 · First fall: 10-13

Hanson County

Last spring: 04-30 · First fall: 10-07

Harding County

Last spring: 05-01 · First fall: 10-08

Hughes County

Last spring: 05-08 · First fall: 10-02

Hutchinson County

Last spring: 04-22 · First fall: 10-13

Hyde County

Last spring: 05-02 · First fall: 10-10

Jackson County

Last spring: 05-01 · First fall: 10-11

Jerauld County

Last spring: 04-23 · First fall: 10-15

Jones County

Last spring: 04-22 · First fall: 10-18

Kingsbury County

Last spring: 04-28 · First fall: 10-14

Lake County

Last spring: 04-27 · First fall: 10-10

Lawrence County

Last spring: 05-06 · First fall: 10-07

Lincoln County

Last spring: 04-23 · First fall: 10-11

Lyman County

Last spring: 05-03 · First fall: 10-05

Marshall County

Last spring: 04-24 · First fall: 10-20

McCook County

Last spring: 04-29 · First fall: 10-08

McPherson County

Last spring: 05-01 · First fall: 10-09

Meade County

Last spring: 05-06 · First fall: 10-03

Mellette County

Last spring: 04-29 · First fall: 10-14

Miner County

Last spring: 04-27 · First fall: 10-11

Minnehaha County

Last spring: 04-15 · First fall: 10-24

Moody County

Last spring: 04-26 · First fall: 10-11

Oglala Lakota County

Last spring: 04-30 · First fall: 10-14

Pennington County

Last spring: 05-02 · First fall: 10-09

Perkins County

Last spring: 05-01 · First fall: 10-09

Potter County

Last spring: 04-29 · First fall: 10-10

Roberts County

Last spring: 04-24 · First fall: 10-10

Sanborn County

Last spring: 04-30 · First fall: 10-06

Spink County

Last spring: 04-29 · First fall: 10-08

Stanley County

Last spring: 05-01 · First fall: 10-05

Sully County

Last spring: 04-29 · First fall: 10-11

Todd County

Last spring: 04-30 · First fall: 10-12

Tripp County

Last spring: 04-22 · First fall: 10-18

Turner County

Last spring: 04-22 · First fall: 10-13

Union County

Last spring: 04-24 · First fall: 10-15

Walworth County

Last spring: 04-30 · First fall: 10-09

Yankton County

Last spring: 04-18 · First fall: 10-21

Ziebach County

Last spring: 04-29 · First fall: 10-09