Frost Dates in Ontario

Amherstburg April 29 – October 22 Appleton May 12 – October 1 Armstrong (Aut) June 10 – August 24 Atikokan (Aut) May 27 – September 22 Bancroft Auto May 29 – September 15 Barwick May 24 – September 20 Belleville April 25 – October 15 Big Trout Lake Readac June 14 – September 4 Bonner Lake June 9 – August 27 Borden Awos May 24 – September 16 Brockville Pcc April 27 – October 14 Burlington Piers (Aut) April 9 – November 15 Cameron Falls (Aut) May 27 – September 24 Centreville May 10 – October 3 Chalk River Aecl May 14 – October 5 Chapleau A May 29 – September 18 Chatsworth May 24 – September 26 Cobourg (Aut) April 27 – October 21 Cobourg Stp May 4 – October 13 Coldwater Warminster May 8 – October 13 Collingwood April 30 – October 27 Cornwall April 28 – October 12 Cove Island (Aut) April 22 – November 4 Delhi Cs May 9 – October 15 Drummond Centre May 12 – September 30 Dunchurch May 28 – September 18 Ear Falls (Aut) May 21 – September 28 Egbert Cs May 13 – October 10 Erieau (Aut) April 13 – November 11 Fergus Moe May 11 – October 8 Fergus Shand Dam May 6 – October 11 Flint June 13 – August 25 Foldens May 2 – October 15 Fort Erie May 5 – October 14 Fort Frances A May 27 – September 15 Georgetown Wwtp May 19 – October 1 Geraldton A May 31 – September 15 Glen Allan May 11 – October 7 Goderich May 9 – October 21 Great Duck Island (Aut) April 25 – October 27 Grenadier Island April 25 – October 22 Haliburton 3 May 28 – September 18 Hamilton A May 1 – October 13 Hamilton Rbg Cs May 4 – October 15 Harrow Cda Auto April 26 – October 26 Hartington Ihd May 5 – October 6 Kapuskasing A June 3 – September 16 Kapuskasing Cda On June 7 – September 12 Kemptville Cs May 9 – October 9 Kenora A May 10 – October 2 Killarney (Aut) April 28 – October 23 Kincardine May 13 – October 16 Kingsville Moe April 20 – October 29 Kirkland Lake Cs May 24 – September 28 Lagoon City April 24 – October 22 Lansdowne House (Aut) May 31 – September 13 Long Point (Aut) April 9 – November 19 Lyndhurst Shawmere May 6 – October 12 Massey May 26 – September 21 Minden May 28 – September 20 Monetville May 21 – September 23 Moosonee Ua June 18 – August 26 Mount Forest (Aut) May 15 – October 9 Mountainview May 1 – October 9 Nagagami (Aut) June 7 – September 12 New Glasgow May 4 – October 16 North Bay A May 15 – September 29 Ompah-Seitz May 12 – October 5 Orangeville Moe May 19 – September 26 Orillia Brain May 5 – October 15 Oshawa Wpcp May 2 – October 17 Ottawa Cda April 30 – October 9 Ottawa Cda Rcs May 1 – October 13 Ottawa Macdonald-Cartier Int'L April 29 – October 7 Peawanuck (Aut) June 20 – August 14 Petawawa Hoffman May 13 – October 1 Peterborough Trent U May 10 – October 2 Pickle Lake (Aut) May 22 – September 25 Pickle Lake A May 24 – September 27 Point Petre (Aut) April 26 – October 25 Port Colborne April 23 – October 25 Port Weller (Aut) April 8 – November 19 Powassan May 26 – September 18 Rawson Lake May 16 – October 1 Red Lake A May 27 – September 20 Richmond Hill May 1 – October 12 Ridgeville April 26 – October 27 Roseville May 9 – October 9 Russell May 6 – October 2 Sandfield May 17 – October 6 Sault Ste Marie A May 28 – September 29 Shanty Bay May 11 – October 9 Sioux Lookout A May 17 – September 28 St Thomas Wpcp May 7 – October 13 St. Albert May 17 – September 28 Stratford Wwtp May 11 – October 11 Strathroy-Mullifarry May 9 – October 14 Sudbury A May 16 – October 1 Tara May 17 – September 30 Thedford May 9 – October 15 Tillsonburg North May 8 – October 11 Timmins Victor Power A June 6 – September 6 Toronto Buttonville A May 4 – October 12 Toronto Lester B. Pearson Int' April 26 – October 19 Toronto North York May 5 – October 12 Trenton A May 2 – October 10 Udora May 15 – October 4 Upsala (Aut) June 2 – September 9 Vineland April 20 – November 2 Wawa A June 1 – September 17 Welcome Island (Aut) May 7 – October 26 Welland May 6 – October 11 Wiarton A May 11 – October 12 Windsor A April 16 – November 1 Windsor Riverside April 23 – October 27 Woodstock May 8 – October 7 Wooler May 6 – September 30