Information for Gardeners
Canadian Frost Dates
These frost dates reflect the average frost date for a region and may not be reliable in a particular year. You may want to check with local gardeners for more accurate frost date information. In Prince Edward Island, most gardeners will tell you that we are not completely safe from frost until about June 8th, and a killing frost can happen in September.
Newfoundland |
| Station |
Last Frost |
First Frost |
| Corner Brook |
May 22 |
October 12 |
| Grand Falls |
June 2 |
September 26 |
| St. John's |
June 2 |
October 12 |
Nova Scotia |
| Station |
Last Frost |
First Frost |
| Halifax |
May 6 |
October 20 |
| Kentville |
May 16 |
October 5 |
| Shelburne |
May 14 |
September 29 |
| Sydney |
May 24 |
October 13 |
| Yarmouth |
May 1 |
October 18 |
Prince Edward Island |
| Station |
Last Frost |
First Frost |
| Charlottetown |
May 17 |
October 9 |
| Summerside |
May 9 |
October 19 |
| Tignish |
May 23 |
October 9 |
New Brunswick |
| Station |
Last Frost |
First Frost |
| Bathurst |
May 19 |
September 26 |
| Edmunston |
May 28 |
September 18 |
| Fredericton |
May 20 |
September 22 |
| Grand Falls |
May 24 |
September 24 |
| Moncton |
May 24 |
September 27 |
| Saint John |
May 18 |
October 4 |
Quebec |
| Station |
Last Frost |
First Frost |
| Baie Comeau |
May 28 |
September 15 |
| Chicoutimi |
May 17 |
September 30 |
| Montreal |
May 3 |
October 7 |
| Quebec |
May 13 |
September 29 |
| Rimouski |
May 13 |
September 30 |
| Sherbrooke |
June 1 |
September 10 |
| Trois-Rivieres |
May 19 |
September 23 |
| Thetford Mines |
May 28 |
September 14 |
Ontario |
| Station |
Last Frost |
First Frost |
| Barrie |
May 26 |
September 16 |
| Hamilton |
April 29 |
October 15 |
| Kingston |
May 2 |
October 10 |
| London |
May 9 |
October 8 |
| Ottawa |
May 6 |
October 5 |
| Owen Sound |
May 12 |
October 15 |
| Parry Sound |
May 17 |
September 28 |
| Peterborough |
May 18 |
September 20 |
| St. Catherines |
May 2 |
October 17 |
| Sudbury |
May 17 |
September 25 |
| Thunder Bay |
June 1 |
September 15 |
| Timmins |
June 8 |
September 6 |
| Toronto |
May 9 |
October 6 |
| Windsor |
April 25 |
October 22 |
Manitoba |
| Station |
Last Frost |
First Frost |
| Brandon |
May 27 |
September 10 |
| The Pas |
May 27 |
September 17 |
| Thompson |
June 15 |
August 16 |
| Winnipeg |
May 25 |
September 22 |
Saskatchewan |
| Station |
Last Frost |
First Frost |
| Moose Jaw |
May 20 |
September 18 |
| Prince Albert |
June 2 |
September 4 |
| Regina |
May 21 |
September 10 |
| Saskatoon |
May 21 |
September 15 |
| Weyburn |
May 22 |
September 12 |
Alberta |
| Station |
Last Frost |
First Frost |
| Athabaska |
June 1 |
August 29 |
| Calgary |
May 23 |
September 15 |
| Edmonton |
May 7 |
September 23 |
| Grande Prairie |
May 18 |
September 13 |
| Lethbridge |
May 17 |
September 18 |
| Medicine Hat |
May 16 |
September 22 |
| Red Deer |
May 25 |
September 9 |
British Columbia |
| Station |
Last Frost |
First Frost |
| Chilliwack |
April 6 |
November 9 |
| Dawson Creek |
June 5 |
August 29 |
| Kamloops |
May 1 |
October 5 |
| Kelowna |
May 19 |
September 20 |
| Nanaimo |
April 28 |
October 17 |
| Port Alberni |
May 8 |
October 15 |
| Prince George |
June 4 |
September 3 |
| Terrace |
May 5 |
October 17 |
| Vancouver |
March 28 |
November 5 |
| Vernon |
April 28 |
October 4 |
| Victoria |
April 19 |
November 5 |
Territories |
| Station |
Last Frost |
First Frost |
| Whitehorse |
June 11 |
August 25 |
| Dawson City |
June 13 |
August 17 |
| Yellowknife |
May 27 |
September 15 |
