When to plant in Niles, OH
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Niles, Ohio — is derived from the closest NOAA station with complete climate normals.
In zone 6a, Niles gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average first fall frost in Niles is now 6 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
WARREN 3 S · 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 Niles’s own odds, recorded at WARREN 3 S.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 3 | May 19 | May 2 | Sep 19 | Oct 2 | Oct 14 |
| 32°F | May 25 | May 8 | Apr 23 | Sep 30 | Oct 12 | Oct 26 |
| 28°F | May 15 | Apr 27 | Apr 13 | Oct 8 | Oct 26 | Nov 7 |
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 Niles, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 12 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.
Niles planting FAQ
When is the last spring frost in Niles, OH?
Niles's average last spring frost falls near May 8 — 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 Niles, OH?
The first fall frost in Niles typically arrives around October 12 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Niles in?
Niles is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Niles?
Niles has about 157 frost-free days — a moderate growing season — between the average last spring frost (May 8) and first fall frost (October 12).
When should I plant tomatoes in Niles?
For Niles, sow tomatoes indoors about March 13–March 27 and move the seedlings out around May 15, after the last spring frost.
Never miss a window in Niles
An email when it’s time to start seeds, transplant, and sow — timed to Niles’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Warren · 8 km
- Austintown · 11 km
- Youngstown · 13 km
- Sharon · 22 km
- Hermitage · 26 km
- Salem · 33 km
- New Castle · 40 km
- Ravenna · 41 km
Frost dates recorded at WARREN 3 S, 5 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 Niles, OH — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00338769. Retrieved from https://blissgarden.com/ohio/niles.