Location of Smoky Lake County in Alberta — Smoky Lake County within Alberta

Hardiness Zone in Smoky Lake County

Smoky Lake County is generally treated as Canadian plant hardiness zone 3a, with a frost-free window on the order of 115 days. The zone is read from the Natural Resources Canada plant hardiness map (4th edition, 1991–2020 normals) at a representative quarter; frost dates are a regional table keyed by zone, not a logger on your fence. Those two numbers decide more tree deaths than soil tests do.

Zone 3a with roughly 105 frost-free days. River valley slopes drain cold air well; upland clearings in the north frost earlier.

What the zone is — and is not

Agriculture and Agri-Food Canada’s plant hardiness maps combine several climate variables, not just one winter low. A zone 3a label means a typical winter in this belt, not the worst winter of the decade, and not the frost pocket at the bottom of your driveway.

Use it to:

Filter nursery stock (do not buy zone 5 peaches for a Smoky Lake County field)
Plan shelterbelts that will still be standing in twenty years
Time cover crops against a 115-day window

Do not use it to:

Ignore a north-facing draw
Skip a thermometer logger for one season
Assume the town of Smoky Lake and a rural quarter share the same last frost

Frost-free days in practice

115 days is a regional sketch. Last spring frost and first fall frost move with elevation, wet ground, and cold-air drainage. In Smoky Lake County, watch:

River and lake edges that radiate heat at night — or collect cold
Open peat or muskeg that frosts early
South walls and gravel pads that buy you a week

A food forest that needs 130 days will fight this county most years. A shelterbelt of zone 3a natives will not.

Pair climate with water and sun

Zone is only one pillar. A 3a site with a 63 m well and 0.8 kWh/m²/day in winter is a different homestead than the same zone on a municipal line. Plan trees, wells, and panels on the same map.

Flood or wet ground near North Saskatchewan River valley, White Earth Creek, Whitefish Lake lowlands can also shorten the effective season by keeping soils cold in May.

See this for your specific parcel

Generate a free land report for a property in Smoky Lake County →

Sampled data for Smoky Lake County

From a Land Intelligence report run on a representative quarter in Township 59, Range 17, W4. These are measured or record-based values for that location, shown to put the county figures above in context. They are not your parcel.

Annual mean1.9 °Clow -36.4 °C · high 28.4 °C in the sampled year

Days with frost195in the sampled year

Frost windowMay 20 – Sep 15regional table for zone 3a

Growing degree days1456base 5 °C

Precipitation456 mm/yr30-year normal at the sample point

Open-Meteo daily archive (ERA5 reanalysis), 2025-10-08 to 2026-10-08: one recent year at the sample point, not a 30-year normal. Use it for the shape of the year, not for a design value.

Growing zones near Smoky Lake County: Fort Saskatchewan (zone 3b) · Vegreville (zone 3a) · St. Paul (zone 2b) · Sherwood Park (zone 3b) · Alberta growing zones map

Neighbouring counties: Thorhild County (39 km) · Lamont County (41 km) · County of Two Hills (66 km) · Strathcona County (73 km) · Compare Smoky Lake County with another county

Sampled from the live report pipeline at a representative quarter in Township 59, Range 17, W4 on 2026-10-08: well depth, hardiness zone, solar irradiance (215 well records within 5 km). Text reviewed 2026-10-09. Methodology.

Common questions

What should I plant in Smoky Lake County?

Start with zone 3a stock and a 115-day season. Then walk frost pockets.

Is the town of Smoky Lake the same zone?

Often close, not identical. Elevation and cold-air drainage on a rural lot can run colder than town.