Frost dates for 95688 — Vacaville, CA
Frost is light and occasional here — typically a few cold nights around midwinter (about 14 a year). Cover tender plants when frost is forecast.
How Vacaville compares
- In a typical year, frost nights in Vacaville fall between December 11 and January 31. In 1 year in 10 the first frost comes as early as November 24, or the last frost as late as March 11.
- Compared with Fairfield, CA, 17 km away, the last frost here is 16 days later than there.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 30 |
| 50% (median) | January 31 |
| 10% (safe for tender plants) | March 11 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 24 |
| 50% (median) | December 11 |
| 90% (late) | January 12 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Vacaville, CA
Frost dates for 95688 — Vacaville, CA — last frost Jan 31, first frost Dec 11, zone 9b. whenisthelastfrost.com
In mild climates, summer heat limits many crops as much as frost does. Use this calendar for spring planting and lean on fall and winter for cool-season crops.
When to plant vegetables in Vacaville, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 8 – Nov 22 | Jan 3 – Jan 17 | — | — |
| Peppers | Nov 22 – Dec 6 | Feb 14 – Feb 28 | — | — |
| Eggplant | Nov 22 – Dec 6 | Feb 14 – Feb 28 | — | — |
| Tomatoes | Dec 6 – Dec 20 | Feb 7 – Feb 21 | — | — |
| Lettuce | Dec 6 – Dec 20 | Jan 10 – Jan 24 | Jan 3 – Feb 7 | Oct 16 – Nov 13 |
| Kale | Dec 6 – Dec 20 | Jan 3 – Jan 17 | Jan 3 – Jan 17 | Oct 2 – Oct 23 |
| Broccoli | Dec 6 – Dec 20 | Jan 17 – Jan 31 | — | Sep 4 – Sep 25 |
| Cabbage | Dec 6 – Dec 20 | Jan 10 – Jan 24 | — | Sep 4 – Sep 25 |
| Cauliflower | Dec 6 – Dec 20 | Jan 17 – Jan 31 | — | Sep 4 – Sep 25 |
| Okra | Dec 20 – Jan 3 | Feb 21 – Mar 7 | Feb 21 – Mar 7 | — |
| Basil | Dec 20 – Jan 3 | Feb 7 – Feb 21 | — | — |
| Peas | — | — | Dec 20 – Jan 10 | Sep 18 – Oct 9 |
| Spinach | — | — | Dec 20 – Jan 10 | Oct 16 – Nov 6 |
| Radishes | — | — | Dec 27 – Feb 7 | Oct 30 – Nov 20 |
| Cucumbers | Jan 3 – Jan 10 | Feb 14 – Feb 21 | Feb 7 – Feb 21 | Sep 25 – Oct 9 |
| Zucchini & Summer Squash | Jan 3 – Jan 10 | — | Feb 7 – Feb 21 | Oct 2 – Oct 16 |
| Winter Squash & Pumpkins | Jan 3 – Jan 10 | — | Feb 7 – Feb 21 | — |
| Melons & Watermelon | Jan 3 – Jan 10 | Feb 14 – Feb 28 | — | — |
| Carrots | — | — | Jan 10 – Feb 7 | Sep 18 – Oct 2 |
| Beets | — | — | Jan 10 – Feb 7 | Oct 2 – Oct 16 |
| Potatoes | — | — | Jan 10 – Jan 31 | — |
| Swiss Chard | — | — | Jan 17 – Feb 14 | Oct 2 – Oct 16 |
| Cilantro | — | — | Jan 17 – Feb 7 | Oct 16 – Nov 6 |
| Green Beans | — | — | Feb 7 – Feb 28 | Sep 25 – Oct 9 |
| Sweet Corn | — | — | Feb 7 – Feb 21 | — |
| Sweet Potatoes | — | Feb 14 – Mar 7 | — | — |
| Garlic | — | — | — | Nov 27 – Jan 1 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Vacaville, CA weather station, 3 km away (elevation 112 ft (34 m)).
ZIP codes in Vacaville: 95687 95688 95696
Frost dates near Vacaville
- Elmira Feb 18 · Nov 28
- Travis Afb Jan 15 · Dec 14
- Winters Feb 18 · Nov 30
- Fairfield Jan 15 · Dec 14
- Suisun City Jan 15 · Dec 14
- Dixon Feb 10 · Dec 1
- Napa Feb 12 · Dec 4
- Davis Feb 10 · Dec 1
Frequently asked questions
When is the last frost in Vacaville, CA?
The median last spring frost in Vacaville, CA is January 31. There is still about a 10% chance of frost after March 11, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Vacaville, CA?
The median first fall frost is December 11, with about a 10% chance of frost before November 24.
How long is the growing season in Vacaville, CA?
About 314 days between the median last spring frost and first fall frost.
What planting zone is Vacaville, CA?
Vacaville, CA is in USDA hardiness zone 9b.