Frost dates for 95687 — Vacaville, CA
Last spring frostFeb 18median date
First fall frostNov 28median date
Growing season283 daysfrost-free
Hardiness zone9bZone 9b
How Vacaville compares
- In 8 years out of 10, the last spring frost in Vacaville falls between January 11 and March 25, a 73-day window. The first fall frost falls between November 12 and December 18.
- The median last frost is 41 days earlier than the California median of Mar 31.
- Its 283-day growing season is longer than 84% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is typical for zone 9b, where the median is Feb 20.
- The weather station records an average of 21 nights a year at or below 32°F.
- Nearby Fairfield, CA, 15 km away, gets only light, occasional frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 11 |
| 50% (median) | February 18 |
| 10% (safe for tender plants) | March 25 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 12 |
| 50% (median) | November 28 |
| 90% (late) | December 18 |
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 95687 — Vacaville, CA — last frost Feb 18, first frost Nov 28, zone 9b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Nov 26 to Dec 10Transplant outside: Jan 21 to Feb 4
Start indoors: Dec 10 to Dec 24Transplant outside: Mar 4 to Mar 18
Start indoors: Dec 10 to Dec 24Transplant outside: Mar 4 to Mar 18
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Feb 25 to Mar 11
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Jan 28 to Feb 11Sow outdoors: Jan 21 to Feb 25Plant for fall: Oct 3 to Oct 31
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Jan 21 to Feb 4Sow outdoors: Jan 21 to Feb 4Plant for fall: Sep 19 to Oct 10
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Feb 4 to Feb 18Plant for fall: Aug 22 to Sep 12
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Jan 28 to Feb 11Plant for fall: Aug 22 to Sep 12
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Feb 4 to Feb 18Plant for fall: Aug 22 to Sep 12
Start indoors: Jan 7 to Jan 21Transplant outside: Mar 11 to Mar 25Sow outdoors: Mar 11 to Mar 25
Start indoors: Jan 7 to Jan 21Transplant outside: Feb 25 to Mar 11
Sow outdoors: Jan 7 to Jan 28Plant for fall: Sep 5 to Sep 26
Sow outdoors: Jan 7 to Jan 28Plant for fall: Oct 3 to Oct 24
Sow outdoors: Jan 14 to Feb 25Plant for fall: Oct 17 to Nov 7
Start indoors: Jan 21 to Jan 28Transplant outside: Mar 4 to Mar 11Sow outdoors: Feb 25 to Mar 11Plant for fall: Sep 12 to Sep 26
Start indoors: Jan 21 to Jan 28Sow outdoors: Feb 25 to Mar 11Plant for fall: Sep 19 to Oct 3
Start indoors: Jan 21 to Jan 28Sow outdoors: Feb 25 to Mar 11
Start indoors: Jan 21 to Jan 28Transplant outside: Mar 4 to Mar 18
Sow outdoors: Jan 28 to Feb 25Plant for fall: Sep 5 to Sep 19
Sow outdoors: Jan 28 to Feb 25Plant for fall: Sep 19 to Oct 3
Sow outdoors: Jan 28 to Feb 18
Sow outdoors: Feb 4 to Mar 4Plant for fall: Sep 19 to Oct 3
Sow outdoors: Feb 4 to Feb 25Plant for fall: Oct 3 to Oct 24
Sow outdoors: Feb 25 to Mar 18Plant for fall: Sep 12 to Sep 26
Sow outdoors: Feb 25 to Mar 11
Transplant outside: Mar 4 to Mar 25
Plant for fall: Nov 14 to Dec 19
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Vacaville, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 26 – Dec 10 | Jan 21 – Feb 4 | — | — |
| Peppers | Dec 10 – Dec 24 | Mar 4 – Mar 18 | — | — |
| Eggplant | Dec 10 – Dec 24 | Mar 4 – Mar 18 | — | — |
| Tomatoes | Dec 24 – Jan 7 | Feb 25 – Mar 11 | — | — |
| Lettuce | Dec 24 – Jan 7 | Jan 28 – Feb 11 | Jan 21 – Feb 25 | Oct 3 – Oct 31 |
| Kale | Dec 24 – Jan 7 | Jan 21 – Feb 4 | Jan 21 – Feb 4 | Sep 19 – Oct 10 |
| Broccoli | Dec 24 – Jan 7 | Feb 4 – Feb 18 | — | Aug 22 – Sep 12 |
| Cabbage | Dec 24 – Jan 7 | Jan 28 – Feb 11 | — | Aug 22 – Sep 12 |
| Cauliflower | Dec 24 – Jan 7 | Feb 4 – Feb 18 | — | Aug 22 – Sep 12 |
| Okra | Jan 7 – Jan 21 | Mar 11 – Mar 25 | Mar 11 – Mar 25 | — |
| Basil | Jan 7 – Jan 21 | Feb 25 – Mar 11 | — | — |
| Peas | — | — | Jan 7 – Jan 28 | Sep 5 – Sep 26 |
| Spinach | — | — | Jan 7 – Jan 28 | Oct 3 – Oct 24 |
| Radishes | — | — | Jan 14 – Feb 25 | Oct 17 – Nov 7 |
| Cucumbers | Jan 21 – Jan 28 | Mar 4 – Mar 11 | Feb 25 – Mar 11 | Sep 12 – Sep 26 |
| Zucchini & Summer Squash | Jan 21 – Jan 28 | — | Feb 25 – Mar 11 | Sep 19 – Oct 3 |
| Winter Squash & Pumpkins | Jan 21 – Jan 28 | — | Feb 25 – Mar 11 | — |
| Melons & Watermelon | Jan 21 – Jan 28 | Mar 4 – Mar 18 | — | — |
| Carrots | — | — | Jan 28 – Feb 25 | Sep 5 – Sep 19 |
| Beets | — | — | Jan 28 – Feb 25 | Sep 19 – Oct 3 |
| Potatoes | — | — | Jan 28 – Feb 18 | — |
| Swiss Chard | — | — | Feb 4 – Mar 4 | Sep 19 – Oct 3 |
| Cilantro | — | — | Feb 4 – Feb 25 | Oct 3 – Oct 24 |
| Green Beans | — | — | Feb 25 – Mar 18 | Sep 12 – Sep 26 |
| Sweet Corn | — | — | Feb 25 – Mar 11 | — |
| Sweet Potatoes | — | Mar 4 – Mar 25 | — | — |
| Garlic | — | — | — | Nov 14 – Dec 19 |
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 Nut Tree Ap, CA weather station, 3 km away (elevation 108 ft (33 m)).
ZIP codes in Vacaville: 95687 95688 95696
Frost dates near Vacaville
- Elmira Feb 18 · Nov 28
- Travis Afb Jan 15 · Dec 14
- Suisun City Jan 15 · Dec 14
- Fairfield Jan 15 · Dec 14
- Dixon Feb 10 · Dec 1
- Winters Feb 18 · Nov 30
- Birds Landing Jan 12 · Dec 19
- Napa Feb 12 · Dec 4
Frequently asked questions
When is the last frost in Vacaville, CA?
The median last spring frost in Vacaville, CA is February 18. There is still about a 10% chance of frost after March 25, 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 November 28, with about a 10% chance of frost before November 12.
How long is the growing season in Vacaville, CA?
About 283 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.