When to plant in Steubenville, OH
USDA Zone 6bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Steubenville, Ohio — all computed from Steubenville's nearest NOAA weather station.
Zone 6b means Steubenville sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
STEUBENVILLE · 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 Steubenville’s own odds, recorded at STEUBENVILLE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 23 | May 8 | Apr 25 | Sep 28 | Oct 9 | Oct 22 |
| 32°F | May 15 | Apr 29 | Apr 16 | Oct 6 | Oct 20 | Nov 1 |
| 28°F | May 3 | Apr 18 | Apr 3 | Oct 17 | Oct 31 | Nov 12 |
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 Steubenville, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 21 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.
Steubenville planting FAQ
When is the last spring frost in Steubenville, OH?
Steubenville's average last spring frost falls near April 29 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Steubenville, OH?
Expect Steubenville's first fall frost near October 20 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Steubenville in?
Steubenville is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Steubenville?
There are roughly 174 frost-free days in Steubenville (a moderate growing season), running from the average last frost around April 29 to the first fall frost near October 20.
When should I plant tomatoes in Steubenville?
In Steubenville, start tomato seeds indoors around March 4–March 18, then transplant seedlings outdoors around May 6 once the danger of frost has passed.
Never miss a window in Steubenville
An email when it’s time to start seeds, transplant, and sow — timed to Steubenville’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Weirton · 9 km
- Wheeling · 33 km
- Washington · 41 km
- Carnot-Moon · 41 km
- Bethel Park · 53 km
- Franklin Park · 53 km
- Whitehall · 57 km
- Pittsburgh · 58 km
Frost dates recorded at STEUBENVILLE, 3 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 Steubenville, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00338025. Retrieved from https://blissgarden.com/ohio/steubenville.