When to plant in Lemay, MO
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Lemay, Missouri — all computed from Lemay's nearest NOAA weather station.
Zone 7a means many perennials and even some tender shrubs overwinter in Lemay, while your frost dates still decide when annuals go out.
Frost probability
CAHOKIA · 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 Lemay’s own odds, recorded at CAHOKIA.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 3 | Apr 18 | Apr 4 | Oct 5 | Oct 18 | Oct 28 |
| 32°F | Apr 20 | Apr 6 | Mar 22 | Oct 14 | Oct 27 | Nov 7 |
| 28°F | Apr 10 | Mar 27 | Mar 11 | Oct 25 | Nov 5 | Nov 23 |
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 Lemay, 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.
Lemay planting FAQ
When is the last spring frost in Lemay, MO?
On average, the last spring frost in Lemay is around April 6 (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 Lemay, MO?
Expect Lemay's first fall frost near October 27 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Lemay in?
Lemay is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Lemay?
There are roughly 204 frost-free days in Lemay (a moderate growing season), running from the average last frost around April 6 to the first fall frost near October 27.
When should I plant tomatoes in Lemay?
In Lemay, start tomato seeds indoors around February 9–February 23, then transplant seedlings outdoors around April 13 once the danger of frost has passed.
Never miss a window in Lemay
An email when it’s time to start seeds, transplant, and sow — timed to Lemay’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at CAHOKIA, 9 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 Lemay, MO — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00111160. Retrieved from https://blissgarden.com/missouri/lemay.