north dakota frost dates, county by county.

Adams County

Last spring: 05-13 · First fall: 09-27

Barnes County

Last spring: 05-04 · First fall: 10-05

Benson County

Last spring: 05-04 · First fall: 10-08

Billings County

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

Bottineau County

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

Bowman County

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

Burke County

Last spring: 05-10 · First fall: 09-25

Burleigh County

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

Cass County

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

Cavalier County

Last spring: 05-07 · First fall: 10-04

Dickey County

Last spring: 04-30 · First fall: 10-05

Divide County

Last spring: 05-07 · First fall: 09-30

Dunn County

Last spring: 05-09 · First fall: 09-30

Eddy County

Last spring: 05-03 · First fall: 10-07

Emmons County

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

Foster County

Last spring: 05-04 · First fall: 10-05

Golden Valley County

Last spring: 05-06 · First fall: 10-04

Grand Forks County

Last spring: 05-04 · First fall: 10-05

Grant County

Last spring: 05-11 · First fall: 10-02

Griggs County

Last spring: 05-07 · First fall: 10-02

Hettinger County

Last spring: 05-07 · First fall: 10-03

Kidder County

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

LaMoure County

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

Logan County

Last spring: 05-04 · First fall: 10-06

McHenry County

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

McIntosh County

Last spring: 05-05 · First fall: 10-04

McKenzie County

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

McLean County

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

Mercer County

Last spring: 05-11 · First fall: 09-28

Morton County

Last spring: 05-08 · First fall: 09-30

Mountrail County

Last spring: 05-08 · First fall: 09-30

Nelson County

Last spring: 05-02 · First fall: 10-07

Oliver County

Last spring: 05-01 · First fall: 10-07

Pembina County

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

Pierce County

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

Ramsey County

Last spring: 04-27 · First fall: 10-14

Ransom County

Last spring: 05-03 · First fall: 10-04

Renville County

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

Richland County

Last spring: 04-23 · First fall: 10-18

Rolette County

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

Sargent County

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

Sheridan County

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

Sioux County

Last spring: 05-01 · First fall: 10-04

Slope County

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

Stark County

Last spring: 05-08 · First fall: 10-03

Steele County

Last spring: 05-03 · First fall: 10-04

Stutsman County

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

Towner County

Last spring: 05-11 · First fall: 10-03

Traill County

Last spring: 04-23 · First fall: 10-20

Walsh County

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

Ward County

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

Wells County

Last spring: 05-02 · First fall: 10-06

Williams County

Last spring: 05-11 · First fall: 09-28