When to plant in Webster, MA
USDA Zone 6bWebster, Massachusetts 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 Webster sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average first fall frost in Webster is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
BUFFUMVILLE LAKE · 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 Webster’s own odds, recorded at BUFFUMVILLE LAKE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 24 | May 12 | May 1 | Sep 20 | Oct 2 | Oct 14 |
| 32°F | May 13 | May 1 | Apr 21 | Sep 28 | Oct 10 | Oct 27 |
| 28°F | May 1 | Apr 19 | Apr 6 | Oct 4 | Oct 22 | Nov 6 |
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 Webster, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
Webster planting FAQ
When is the last spring frost in Webster, MA?
Plan for the last spring frost in Webster around May 1 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Webster, MA?
In Webster, the first 32°F freeze of fall lands around October 10 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Webster in?
Webster 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 Webster?
There are roughly 162 frost-free days in Webster (a moderate growing season), running from the average last frost around May 1 to the first fall frost near October 10.
When should I plant tomatoes in Webster?
In Webster, start tomato seeds indoors around March 6–March 20, then transplant seedlings outdoors around May 8 once the danger of frost has passed.
Never miss a window in Webster
An email when it’s time to start seeds, transplant, and sow — timed to Webster’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Southbridge Town · 13 km
- Worcester · 25 km
- Woonsocket · 31 km
- Milford · 32 km
- Franklin Town · 39 km
- Palmer Town · 39 km
- Storrs · 41 km
- Valley Falls · 42 km
Frost dates recorded at BUFFUMVILLE LAKE, 8 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 Webster, MA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00190998. Retrieved from https://blissgarden.com/massachusetts/webster.