When to plant in Arcadia, CA
USDA Zone 10aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Arcadia, California — all computed from Arcadia's nearest NOAA weather station.
Arcadia's growing season is short at roughly -2 days, so succession planting is limited; lean on transplants over direct sowing for anything slow to mature. In zone 10a, frost is a minor factor for Arcadia — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
SAN GABRIEL FIRE DEPT · 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 Arcadia’s own odds, recorded at SAN GABRIEL FIRE DEPT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 20 | Jan 17 | Dec 20 | Dec 6 | Dec 26 | Jan 30 |
| 32°F | Jan 28 | Jan 4 | Dec 19 | Dec 18 | Jan 2 | Jan 26 |
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 Arcadia, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 11 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.
Arcadia planting FAQ
When is the last spring frost in Arcadia, CA?
Plan for the last spring frost in Arcadia around January 4 (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 Arcadia, CA?
In Arcadia, the first 32°F freeze of fall lands around January 2 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Arcadia in?
Arcadia is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Arcadia?
Arcadia has about -2 frost-free days — a short growing season — between the average last spring frost (January 4) and first fall frost (January 2).
When should I plant tomatoes in Arcadia?
For Arcadia, sow tomatoes indoors about November 9–November 23 and move the seedlings out around January 11, after the last spring frost.
Never miss a window in Arcadia
An email when it’s time to start seeds, transplant, and sow — timed to Arcadia’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Temple City · 4 km
- Sierra Madre · 4 km
- East San Gabriel · 4 km
- Monrovia · 6 km
- El Monte · 6 km
- San Gabriel · 7 km
- San Marino · 7 km
- Baldwin Park · 8 km
Frost dates recorded at SAN GABRIEL FIRE DEPT, 8 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 Arcadia, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00047785. Retrieved from https://blissgarden.com/california/arcadia.