When to plant in Summerlin South, NV
USDA Zone 9aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Summerlin South, Nevada — all computed from Summerlin South's nearest NOAA weather station.
Summerlin South enjoys a long ~247-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 9a is warm enough that Summerlin South can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Summerlin South is now 21 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
RED ROCK CANYON - SPG MT RCH 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 Summerlin South’s own odds, recorded at RED ROCK CANYON - SPG MT RCH S.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 25 | Apr 6 | Mar 11 | Oct 22 | Nov 5 | Nov 19 |
| 32°F | Apr 11 | Mar 13 | Feb 20 | Oct 31 | Nov 15 | Nov 30 |
| 28°F | Mar 19 | Feb 21 | Jan 29 | Nov 9 | Nov 27 | Dec 15 |
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 Summerlin South, 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.
Summerlin South planting FAQ
When is the last spring frost in Summerlin South, NV?
Plan for the last spring frost in Summerlin South around March 13 (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 Summerlin South, NV?
Expect Summerlin South's first fall frost near November 15 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Summerlin South in?
Summerlin South is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Summerlin South?
There are roughly 247 frost-free days in Summerlin South (a long growing season), running from the average last frost around March 13 to the first fall frost near November 15.
When should I plant tomatoes in Summerlin South?
In Summerlin South, start tomato seeds indoors around January 16–January 30, then transplant seedlings outdoors around March 20 once the danger of frost has passed.
Never miss a window in Summerlin South
An email when it’s time to start seeds, transplant, and sow — timed to Summerlin South’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Spring Valley · 7 km
- Las Vegas · 14 km
- Enterprise · 16 km
- Winchester · 18 km
- Paradise · 18 km
- Sunrise Manor · 26 km
- Whitney · 27 km
- North Las Vegas · 29 km
Frost dates recorded at RED ROCK CANYON - SPG MT RCH S, 13 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 Summerlin South, NV — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00266691. Retrieved from https://blissgarden.com/nevada/summerlin-south.