massachusetts frost dates, county by county.

Barnstable County

Last spring: 04-01 · First fall: 11-17

Berkshire County

Last spring: 04-27 · First fall: 10-15

Bristol County

Last spring: 04-15 · First fall: 10-28

Dukes County

Last spring: 04-26 · First fall: 10-25

Essex County

Last spring: 04-23 · First fall: 10-25

Franklin County

Last spring: 04-18 · First fall: 10-25

Hampden County

Last spring: 04-21 · First fall: 10-20

Hampshire County

Last spring: 04-23 · First fall: 10-21

Middlesex County

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

Nantucket County

Last spring: 03-31 · First fall: 11-23

Norfolk County

Last spring: 04-08 · First fall: 10-23

Plymouth County

Last spring: 04-03 · First fall: 11-13

Suffolk County

Last spring: 03-28 · First fall: 11-21

Worcester County

Last spring: 04-11 · First fall: 11-01