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Last and first frost dates in Saskatoon

Canada

In Saskatoon the last spring frost usually comes around 15 May and the first autumn frost around 6 October, which leaves about 144 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 30 May to 16 June.

Last spring frostaround 15 May
First autumn frostaround 6 October
Frost-free days144 days

Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.

When is the last frost in Saskatoon?

The last frost in Saskatoon usually comes around 15 May: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 24 April, while corn waits until 22 May. The first autumn frost follows around 6 October, about 144 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha22 March – 28 June1 May – 7 August22 May – 7 August
Ageratumfrom 14 March—from 30 May
Arugula——sow 24 April – 1 September
Basil17 April – 4 August25 May – 11 September15 June – 11 September
Beet——sow 24 April – 7 August
Bell Pepper26 March – 17 April25 May – 16 June15 June – 16 June
Black-eyed Susanfrom 28 February—from 22 May
Bok Choy27 March – 15 August1 May – 19 September22 May – 19 September
Borage——sow 22 May – 12 August
Broad bean——sow 24 April – 28 June
Broccoli——sow 24 April – 21 June
Brussels Sprouts17 February – 19 May3 April – 3 July24 April – 3 July
Busy Lizziefrom 27 February—from 22 May
Cabbage——sow 24 April – 29 May
Calendula——sow from 24 April
Carrot——sow 24 April – 14 July
Cauliflower20 February – 21 June3 April – 2 August24 April – 2 August
Celeriac13 February – 18 April1 May – 4 July22 May – 4 July
Celery13 February – 28 April1 May – 14 July22 May – 14 July
Celosiafrom 29 Marchfrom 13 Mayfrom 3 June
Chamomile——sow 24 April – 2 August
Chayote2 February – 11 April1 May – 8 July22 May – 8 July
Chickpea——sow 24 April – 18 June
Chicory9 March – 13 July—24 April – 7 August
Chili Pepper26 March – 24 May25 May – 23 July15 June – 23 July
China asterfrom 3 Aprilfrom 25 Mayfrom 15 June
Chives——sow 24 April – 24 July
Cilantro——sow 24 April – 3 August
Corn——sow 22 May – 18 June
Corn poppy——sow from 24 April
Cosmosfrom 29 Marchfrom 13 Mayfrom 3 June
Cucumber27 April – 24 June25 May – 22 July15 June – 22 July
Daikon——sow 24 April – 31 July
Delphiniumfrom 3 February—from 24 April
Dill——sow 24 April – 13 August
Edging lobeliafrom 27 February—from 22 May
Eggplant26 March – 17 April25 May – 16 June15 June – 16 June
Florence fennel17 March – 28 June1 May – 12 August22 May – 12 August
Foxglovefrom 16 January—from 24 April
Garden sorrel——sow 24 April – 1 August
Green Beans——sow 3 June – 26 June
Hollyhock——sow from 24 April
Hyssop——sow 24 April – 24 June
Kale——sow 24 April – 26 July
Kiwano7 April – 1 July9 May – 2 August30 May – 2 August
Kohlrabi——sow 24 April – 5 August
Leek23 January – 9 April3 April – 18 June24 April – 18 June
Lemon balm——sow 24 April – 28 July
Lettuce——sow 24 April – 10 August
Lisianthusfrom 6 Januaryfrom 3 Aprilfrom 24 April
Lovage——sow from 24 April
Luffafrom 13 Aprilfrom 25 Mayfrom 15 June
Marigoldfrom 20 Marchfrom 1 Mayfrom 22 May
Marjoram26 March – 13 July—15 June – 11 September
Melon27 April – 11 June25 May – 9 July15 June – 9 July
Microgreens——sow 3 June – 22 September
Moringa17 April – 18 July11 June – 11 September2 July – 11 September
Moss rosefrom 6 March—from 22 May
Mustard greens——sow 24 April – 22 August
Napa cabbage29 March – 23 July1 May – 25 August22 May – 25 August
Nasturtiumfrom 24 Marchfrom 1 Mayfrom 22 May
Okra13 April – 6 July25 May – 17 August15 June – 17 August
Oregano2 February – 3 July3 April – 1 September24 April – 1 September
Pansyfrom 6 Februaryfrom 3 Aprilfrom 24 April
Parsley——sow 24 April – 22 July
Parsnip——sow 24 April – 10 June
Peanut18 April – 1 June25 May – 8 July15 June – 8 July
Peas——sow 24 April – 24 July
Petuniafrom 23 Marchfrom 25 Mayfrom 15 June
Physalis25 March – 29 May9 May – 13 July30 May – 13 July
Pumpkin13 April – 11 June25 May – 23 July15 June – 23 July
Purple coneflowerfrom 31 January—from 24 April
Radish——sow 24 April – 6 September
Sage13 February – 29 June3 April – 17 August24 April – 17 August
Scarlet sagefrom 18 March—from 30 May
Snapdragonfrom 28 Januaryfrom 3 Aprilfrom 24 April
Soybean——sow 15 June – 18 July
Spinach——sow 24 April – 12 August
Stevia21 March – 20 May9 May – 8 July30 May – 8 July
Stock——sow from 24 April
Sunflower——sow from 3 June
Sweet alyssum——sow from 24 April
Sweet Corn11 April – 13 July3 May – 4 August24 May – 4 August
Sweet peafrom 20 Februaryfrom 3 Aprilfrom 24 April
Sweet William——sow from 24 April
Swiss Chard——sow 24 April – 7 August
Thyme——sow 24 April – 18 June
Tomato18 March – 25 April9 May – 16 June30 May – 16 June
Turnip——sow 24 April – 9 August
Watercress——sow 24 April – 20 August
Watermelon27 April – 30 May25 May – 27 June15 June – 27 June
Zinniafrom 7 Mayfrom 11 Junefrom 2 July
Zucchini4 May – 29 June25 May – 20 July15 June – 20 July

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

When the soil warms up in Saskatoon

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 7 days before the last spring frost and 15 °C 15 days after it.

SoilDateAgainst the last spring frost
5 °C29 April16 days earlier
10 °C8 May7 days earlier
15 °C30 May15 days later
18 °C15 June31 days later

Frost dates near Saskatoon

Of the nearest cities on our list, the last spring frost ends earliest in Billings (25 April) and latest in Regina (14 May).

CityDistanceLast spring frostFirst autumn frost
Regina235 km14 May6 October
Edmonton484 km7 May6 October
Calgary525 km13 May1 October
Winnipeg711 km12 May12 October
Billings719 km25 April14 October

Seeds, seedlings and markets in Saskatoon

Within 15 km of Saskatoon OpenStreetMap lists 7 garden centres, 1 farm-supply shop, 1 plant nursery, 2 markets and 1 farm shop (collected 20 October 2026). The nearest garden centre to the city centre is Hi-Way Greenhouse, 3 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Saskatoon

Frosts in Saskatoon usually come from about 6 October to about 15 May. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Saskatoon by month

Average weather in Saskatoon over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: June–September (20.1–25.3 °C). Nights average below 0 °C in November–April (-18.7–-2.8 °C). About 410 mm of rain falls in a year, on 79 days; June is the wettest month (86 mm) and February the driest (15 mm).

MonthDay, °CNight, °CRain, mmRainy days
January-8-16.7186
February-8.7-18.7154
March-0.8-11225
April9.6-2.8196
May19.25.8427
June22.811.28611
July25.3146010
August24.512.7437
September20.18.3326
October9.70.3255
November-0.4-7.5307
December-7.3-15.7185

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

CropWhen to plant
Bearded Irisby 6 September
Crocus6 September – 19 October
Daffodil6 September – 19 October
Garlic6 September – 19 October
Grape hyacinthby 6 September
Helleboreby 6 September
Hyacinth6 September – 19 October
Lilyby 6 September
Ornamental onionby 6 September
Peonyby 6 September
Saffronby 6 September
Snowdropby 6 September
Tulip6 September – 19 October
Wild garlicby 6 September

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).