When to plant in Vacaville, CA
Planting dates worked out from Vacaville's own frost records, not a generic zone chart.
Safe to plant out
Mar 26
1 year in 10 has a later frost
Average last frost
Feb 16
about a 50% chance of a later one
Average first fall frost
Nov 30
1 year in 10 by Nov 10
Frost-free days
282
median, 1991–2020
Station used: Vacaville/nut Tree Ap Asos · 3.4 km away · station 32 m, town 53 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Jan 29 – Feb 12 | Mar 26 – Apr 9 | May 20 |
| Sweet pepper | Jan 15 – Jan 29 | Mar 26 – Apr 9 | May 25 |
| Lettuce (leaf) | Dec 15 – Dec 22 | Jan 19 – Feb 2 | Feb 28 |
| Peas | — | Jan 5 – Feb 2 | Mar 1 |
| Bush beans | — | Mar 19 – Apr 9 | May 8 |
| Carrot | — | Jan 26 – Mar 9 | Mar 27 |
| Beet | — | Jan 19 – Mar 2 | Mar 10 |
| Potato | — | Jan 26 – Feb 16 | Apr 6 |
| Kale | Dec 8 – Dec 22 | Jan 19 – Feb 2 | Mar 3 |
| Broccoli | Dec 8 – Dec 22 | Jan 19 – Feb 9 | Mar 20 |
| Cucumber | Feb 26 – Mar 5 | Mar 26 – Apr 9 | May 15 |
| Summer squash and zucchini | Feb 26 – Mar 5 | Mar 26 – Apr 9 | May 10 |
| Winter squash | Feb 26 – Mar 5 | Mar 26 – Apr 9 | Jun 14 |
| Sweet corn | — | Mar 19 – Apr 9 | May 18 |
| Onion (from sets) | — | Jan 19 – Feb 9 | Apr 19 |
| Garlic | — | Nov 16 – Dec 14 (fall) | following summer |
| Spinach | — | Jan 5 – Feb 2 | Feb 12 |
| Basil | Feb 12 – Feb 26 | Mar 26 – Apr 9 | May 22 |
Vacaville's weather over time
How the growing season has shifted here, year by year, from the station's own records.
Each year's last spring frostLong-term trend
See the data as a table
| Year | Last spring frost |
|---|---|
| 1999 | Apr 9 |
| 2000 | Jan 6 |
| 2001 | Apr 8 |
| 2002 | Mar 19 |
| 2003 | Feb 10 |
| 2004 | Feb 11 |
| 2005 | Jan 12 |
| 2006 | Mar 11 |
| 2007 | Feb 28 |
| 2008 | Jan 15 |
| 2009 | Feb 10 |
| 2011 | Feb 27 |
| 2012 | Feb 26 |
| 2013 | Feb 27 |
| 2014 | Feb 5 |
| 2015 | Jan 5 |
| 2017 | Feb 26 |
| 2018 | Mar 5 |
| 2019 | Feb 23 |
| 2020 | Mar 27 |
| 2021 | Jan 26 |
| 2022 | Mar 12 |
| 2023 | Mar 27 |
| 2024 | Apr 6 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1999 | 244 |
| 2000 | 309 |
| 2001 | 266 |
| 2002 | 280 |
| 2003 | 285 |
| 2004 | 290 |
| 2005 | 318 |
| 2006 | 257 |
| 2007 | 275 |
| 2008 | 327 |
| 2009 | 299 |
| 2010 | 326 |
| 2011 | 279 |
| 2012 | 257 |
| 2013 | 270 |
| 2014 | 324 |
| 2015 | 323 |
| 2016 | 338 |
| 2017 | 284 |
| 2018 | 249 |
| 2019 | 250 |
| 2020 | 227 |
| 2021 | 317 |
| 2022 | 246 |
| 2023 | 242 |
| 2024 | 226 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1999 | 20.6 °C |
| 2000 | 21.2 °C |
| 2001 | 21.8 °C |
| 2002 | 21.2 °C |
| 2003 | 20.9 °C |
| 2004 | 21.6 °C |
| 2005 | 21.1 °C |
| 2006 | 21.8 °C |
| 2007 | 21.4 °C |
| 2008 | 22.4 °C |
| 2009 | 22.9 °C |
| 2010 | 20.5 °C |
| 2011 | 20.5 °C |
| 2012 | 21.3 °C |
| 2013 | 21.8 °C |
| 2014 | 21.7 °C |
| 2015 | 22.2 °C |
| 2016 | 22.1 °C |
| 2017 | 22.7 °C |
| 2018 | 21.5 °C |
| 2019 | 21.9 °C |
| 2020 | 22.7 °C |
| 2021 | 22.8 °C |
| 2022 | 22.8 °C |
| 2023 | 21.2 °C |
| 2024 | 22.6 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Vacaville/nut Tree Ap Asos (NOAA GHCN-Daily). Years with too many missing days are left out.