Frost dates for Simi Valley, California
In a typical year, Simi Valley’s last spring frost lands around Jan 8 and the first fall frost around Jan 1, a growing season of about 358 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 10a.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Dec 8 | Nov 30 |
| 50 percent | Jan 8 | Jan 1 |
| 90 percent | Mar 10 | Feb 25 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Simi Valley is typically around 78°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Simi Valley
- Tomato (Sungold)
- Eggplant (Black Beauty)
- Sweet pepper (California Wonder)
- Bush bean (Blue Lake Bush 274)
- Pole bean (Blue Lake Pole)
- Hot pepper (Jalapeño)
- Zucchini (Black Beauty)
- Zinnia (Benary's Giant)
Timing comes from the same temperature engine the app uses, run against Simi Valley’s normals for today.
Nearby cities
- Thousand Oaks, CA (around Jan 24 to Dec 15)
- Santa Clarita, CA (around Jan 8 to Jan 1)
- Oxnard, CA (around Dec 29 to Dec 24)
- Glendale, CA (around Jan 2 to Dec 26)
- Los Angeles, CA (around Jan 8 to Jan 7)
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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