When to plant in Weslaco, TX
USDA Zone 10aEverything below — frost dates, hardiness zone, and what to plant when in Weslaco, Texas — is derived from the closest NOAA station with complete climate normals.
A generous ~357-day season lets Weslaco gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. Zone 10a is warm enough that Weslaco can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Weslaco is now 10 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
WESLACO · 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 Weslaco’s own odds, recorded at WESLACO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 1 | Jan 28 | Dec 18 | Nov 25 | Dec 19 | Jan 27 |
| 32°F | Feb 18 | Jan 8 | Dec 8 | Dec 3 | Dec 31 | Feb 7 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Weslaco, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Weslaco planting FAQ
When is the last spring frost in Weslaco, TX?
On average, the last spring frost in Weslaco is around January 8 (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 Weslaco, TX?
Expect Weslaco's first fall frost near December 31 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Weslaco in?
Weslaco is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Weslaco?
There are roughly 357 frost-free days in Weslaco (a long growing season), running from the average last frost around January 8 to the first fall frost near December 31.
When should I plant tomatoes in Weslaco?
In Weslaco, start tomato seeds indoors around November 13–November 27, then transplant seedlings outdoors around January 15 once the danger of frost has passed.
Never miss a window in Weslaco
An email when it’s time to start seeds, transplant, and sow — timed to Weslaco’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at WESLACO, 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 Weslaco, TX — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00419588. Retrieved from https://blissgarden.com/texas/weslaco.