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Canadian Frost Dates: Spring and Fall Freeze Charts by City

Below is a chart showing Canada frost dates in spring and fall for various Canadian cities. (Click here for U.S. frost dates.)

PLEASE NOTE: The reference source is Environment Canada's National Climate Services. Data set last calculated for 1981–2010 Normals. Below are select cities; if yours isn't listed, click here.

Canadian Frost Dates

Dates reflect normal averages for a light freeze (29°–32°F, or –2°–0°C); local weather and topography may cause variations. Frost probability after spring dates and before fall dates is 50%. A light freeze kills only tender plants, with little effect on other vegetation.

City	Province	Growing Season (Days)	Last Spring Frost	First Fall Frost
Athabasca	AB	112	May 21	Sept. 10
Calgary	AB	107	May 26	Sept. 10
Edmonton	AB	132	May 10	Sept. 19
Grande Prairie	AB	120	May 16	Sept. 13
Lethbridge	AB	123	May 18	Sept. 18
Medicine Hat	AB	127	May 14	Sept. 18
Peace River	AB	109	May 21	Sept. 7
Red Deer	AB	108	May 24	Sept. 9
Abbotsford	BC	186	Apr. 20	Oct. 23
Castlegar	BC	159	May 1	Oct. 7
Chilliwack	BC	204	Apr. 11	Nov. 1
Coombs	BC	151	May 7	Oct. 5
Dawson Creek	BC	90	June 4	Sept. 2
Kamloops	BC	159	Apr. 30	Oct. 6
Kelowna	BC	130	May 16	Sept. 23
Nanaimo	BC	175	Apr. 26	Oct. 18
Prince George	BC	93	May 31	Sept. 1
Prince Rupert	BC	158	May 9	Oct. 14
Vancouver	BC	229	Mar. 27	Nov. 11
Victoria	BC	205	Apr. 14	Nov. 5
Brandon	MB	115	May 22	Sept. 14
Lynn Lake	MB	99	June 4	Sept. 11
The Pas	MB	116	May 26	Sept. 19
Thompson	MB	70	June 14	Aug. 23
Winnipeg	MB	121	May 24	Sept. 22
Bathurst	NB	132	May 17	Sept. 26
Fredericton	NB	128	May 17	Sept. 22
Miramichi	NB	128	May 20	Sept. 25
Moncton	NB	127	May 23	Sept. 27
Saint John	NB	139	May 17	Oct. 3
Corner Brook	NL	141	May 23	Oct. 11
Gander	NL	130	June 3	Oct. 11
Grand Falls	NL	117	June 4	Sept. 29
St. John's	NL	136	June 1	Oct. 15
Halifax	NS	177	May 1	Oct. 25
Kentville	NS	134	May 20	Oct. 1
Sydney	NS	145	May 24	Oct. 16
Truro	NS	115	May 30	Sept. 22
Yarmouth	NS	177	Apr. 29	Oct. 23
Fort Simpson	NT	91	May 27	Aug. 26
Norman Wells	NT	100	May 27	Sept. 4
Yellowknife	NT	113	May 28	Sept. 18
Barrie	ON	158	May 5	Oct. 10
Brantford	ON	162	May 1	Oct. 10
Hamilton	ON	168	Apr. 28	Oct. 13
Kapuskasing	ON	95	June 8	Sept. 11
Kingston	ON	168	Apr. 26	Oct. 11
London	ON	154	May 8	Oct. 9
Ottawa	ON	148	May 7	Oct. 2
Owen Sound	ON	163	May 5	Oct. 15
Peterborough	ON	133	May 14	Sept. 24
Sudbury	ON	133	May 17	Sept. 27
Timmins	ON	94	June 7	Sept. 9
Toronto	ON	158	May 4	Oct. 9
Wawa	ON	104	June 5	Sept. 17
Windsor	ON	186	Apr. 22	Oct. 25
Alberton	PE	129	May 28	Oct. 4
Charlottetown	PE	152	May 18	Oct. 17
Summerside	PE	167	May 6	Oct. 20
Baie Comeau	QC	114	May 26	Sept. 17
La Tuque	QC	114	May 30	Sept. 21
Magog	QC	142	May 14	Oct. 3
Montreal	QC	163	Apr. 29	Oct. 9
Quebec	QC	139	May 12	Sept. 28
Rimouski	QC	146	May 15	Oct. 8
Roberval	QC	124	May 23	Sept. 24
Thetford Mines	QC	136	May 17	Sept. 30
Trois-Rivieres	QC	131	May 18	Sept. 26
Moose Jaw	SK	123	May 17	Sept. 17
North Battleford	SK	119	May 21	Sept. 17
Prince Albert	SK	101	June 1	Sept. 10
Regina	SK	105	May 28	Sept. 10
Saskatoon	SK	116	May 22	Sept. 15
Weyburn	SK	118	May 20	Sept. 15
Yorkton	SK	115	May 22	Sept. 14
Dawson	YT	72	June 4	Aug. 15
Watson Lake	YT	94	May 30	Sept. 1
Whitehorse	YT	87	June 4	Aug. 30