When to plant in Riverton, UT
USDA Zone 7aRiverton, Utah frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 7a, Riverton supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
DRAPER-POINT OF MTN · 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 Riverton’s own odds, recorded at DRAPER-POINT OF MTN.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 22 | May 2 | Apr 17 | Sep 27 | Oct 10 | Oct 23 |
| 32°F | May 6 | Apr 18 | Mar 31 | Oct 7 | Oct 22 | Nov 5 |
| 28°F | Apr 17 | Mar 31 | Mar 7 | Oct 18 | Nov 2 | Nov 18 |
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 Riverton, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 18 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.
Riverton planting FAQ
When is the last spring frost in Riverton, UT?
Riverton's average last spring frost falls near April 18 — 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 Riverton, UT?
In Riverton, the first 32°F freeze of fall lands around October 22 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Riverton in?
Riverton 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 Riverton?
Riverton has about 187 frost-free days — a moderate growing season — between the average last spring frost (April 18) and first fall frost (October 22).
When should I plant tomatoes in Riverton?
For Riverton, sow tomatoes indoors about February 21–March 7 and move the seedlings out around April 25, after the last spring frost.
Never miss a window in Riverton
An email when it’s time to start seeds, transplant, and sow — timed to Riverton’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- South Jordan · 5 km
- Bluffdale · 5 km
- Herriman · 6 km
- Draper · 9 km
- West Jordan · 10 km
- Sandy · 11 km
- Midvale · 12 km
- Lehi · 14 km
Frost dates recorded at DRAPER-POINT OF MTN, 6 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 Riverton, UT — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00422235. Retrieved from https://blissgarden.com/utah/riverton.