When to plant in West Haven, UT
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for West Haven, Utah — all computed from West Haven's nearest NOAA weather station.
Zone 7a means many perennials and even some tender shrubs overwinter in West Haven, while your frost dates still decide when annuals go out.
The average last spring frost in West Haven is now 8 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
OGDEN SUGAR FACTORY · 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 West Haven’s own odds, recorded at OGDEN SUGAR FACTORY.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 26 | May 7 | Apr 22 | Sep 23 | Oct 6 | Oct 21 |
| 32°F | May 9 | Apr 22 | Apr 5 | Oct 1 | Oct 18 | Nov 2 |
| 28°F | Apr 22 | Apr 3 | Mar 12 | Oct 15 | Oct 29 | Nov 13 |
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 West Haven, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 10 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.
West Haven planting FAQ
When is the last spring frost in West Haven, UT?
West Haven's average last spring frost falls near April 22 — 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 West Haven, UT?
The first fall frost in West Haven typically arrives around October 18 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is West Haven in?
West Haven 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 West Haven?
There are roughly 179 frost-free days in West Haven (a moderate growing season), running from the average last frost around April 22 to the first fall frost near October 18.
When should I plant tomatoes in West Haven?
In West Haven, start tomato seeds indoors around February 25–March 11, then transplant seedlings outdoors around April 29 once the danger of frost has passed.
Never miss a window in West Haven
An email when it’s time to start seeds, transplant, and sow — timed to West Haven’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Roy · 4 km
- Ogden · 7 km
- Clinton · 8 km
- South Ogden · 9 km
- West Point · 10 km
- Clearfield · 13 km
- Pleasant View · 14 km
- Syracuse · 14 km
Frost dates recorded at OGDEN SUGAR FACTORY, 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 West Haven, UT — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00426414. Retrieved from https://blissgarden.com/utah/west-haven.