When to plant in Huron, SD
USDA Zone 4bHuron, South Dakota frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 4b, Huron winters are severe; choose cold-hardy perennials and time annuals carefully around the frost dates above.
Frost probability
HURON RGNL AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Huron’s own odds, recorded at HURON RGNL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 28 | May 16 | May 3 | Sep 10 | Sep 24 | Oct 5 |
| 32°F | May 20 | May 6 | Apr 23 | Sep 19 | Oct 2 | Oct 14 |
| 28°F | May 11 | Apr 27 | Apr 12 | Sep 26 | Oct 8 | Oct 22 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Huron, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 43 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Huron planting FAQ
When is the last spring frost in Huron, SD?
On average, the last spring frost in Huron is around May 6 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Huron, SD?
In Huron, the first 32°F freeze of fall lands around October 2 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Huron in?
Huron is in USDA hardiness zone 4b. In zone 4b, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Huron?
Huron has about 149 frost-free days — a short growing season — between the average last spring frost (May 6) and first fall frost (October 2).
When should I plant tomatoes in Huron?
For Huron, sow tomatoes indoors about March 11–March 25 and move the seedlings out around May 13, after the last spring frost.
Never miss a window in Huron
An email when it’s time to start seeds, transplant, and sow — timed to Huron’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at HURON RGNL AP, 4 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Huron, SD — Frost Dates & Zone 4b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014936. Retrieved from https://blissgarden.com/south-dakota/huron.