When to plant in Tonawanda, NY
USDA Zone 6bTonawanda, New York frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 6b means Tonawanda sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
N TONAWANDA · 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 Tonawanda’s own odds, recorded at N TONAWANDA.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 27 | May 15 | May 2 | Sep 20 | Oct 2 | Oct 16 |
| 32°F | May 19 | May 6 | Apr 24 | Sep 30 | Oct 15 | Oct 30 |
| 28°F | May 10 | Apr 26 | Apr 12 | Oct 12 | Oct 29 | Nov 10 |
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 Tonawanda, 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.
Tonawanda planting FAQ
When is the last spring frost in Tonawanda, NY?
Tonawanda's average last spring frost falls near May 6 — 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 Tonawanda, NY?
In Tonawanda, the first 32°F freeze of fall lands around October 15 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Tonawanda in?
Tonawanda 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 Tonawanda?
There are roughly 162 frost-free days in Tonawanda (a moderate growing season), running from the average last frost around May 6 to the first fall frost near October 15.
When should I plant tomatoes in Tonawanda?
In Tonawanda, start tomato seeds indoors around March 11–March 25, then transplant seedlings outdoors around May 13 once the danger of frost has passed.
Never miss a window in Tonawanda
An email when it’s time to start seeds, transplant, and sow — timed to Tonawanda’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Tonawanda Town · 3 km
- North Tonawanda · 4 km
- Kenmore · 5 km
- Eggertsville · 8 km
- Buffalo · 13 km
- Niagara Falls · 14 km
- Cheektowaga · 16 km
- Depew · 18 km
Frost dates recorded at N TONAWANDA, 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 Tonawanda, NY — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00306047. Retrieved from https://blissgarden.com/new-york/tonawanda.