When to plant in Vallejo, CA
Planting dates worked out from Vallejo's own frost records, not a generic zone chart.
Safe to plant out
Apr 30
1 year in 10 has a later frost
Average last frost
Mar 25
about a 50% chance of a later one
Average first fall frost
Nov 15
1 year in 10 by Oct 31
Frost-free days
224
median, 1991–2020
Station used: Napa Co Ap · 11.7 km away · station 5 m, town 21 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 | Mar 5 – Mar 19 | Apr 30 – May 14 | Jun 24 |
| Sweet pepper | Feb 19 – Mar 5 | Apr 30 – May 14 | Jun 29 |
| Lettuce (leaf) | Jan 21 – Jan 28 | Feb 25 – Mar 11 | Apr 6 |
| Peas | — | Feb 11 – Mar 11 | Apr 7 |
| Bush beans | — | Apr 23 – May 14 | Jun 12 |
| Carrot | — | Mar 4 – Apr 15 | May 3 |
| Beet | — | Feb 25 – Apr 8 | Apr 16 |
| Potato | — | Mar 4 – Mar 25 | May 13 |
| Kale | Jan 14 – Jan 28 | Feb 25 – Mar 11 | Apr 9 |
| Broccoli | Jan 14 – Jan 28 | Feb 25 – Mar 18 | Apr 26 |
| Cucumber | Apr 2 – Apr 9 | Apr 30 – May 14 | Jun 19 |
| Summer squash and zucchini | Apr 2 – Apr 9 | Apr 30 – May 14 | Jun 14 |
| Winter squash | Apr 2 – Apr 9 | Apr 30 – May 14 | Jul 19 |
| Sweet corn | — | Apr 23 – May 14 | Jun 22 |
| Onion (from sets) | — | Feb 25 – Mar 18 | May 26 |
| Garlic | — | Nov 1 – Nov 29 (fall) | following summer |
| Spinach | — | Feb 11 – Mar 11 | Mar 21 |
| Basil | Mar 19 – Apr 2 | Apr 30 – May 14 | Jun 26 |
Vallejo'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 28 |
| 2000 | Jan 28 |
| 2001 | Apr 15 |
| 2002 | Mar 19 |
| 2003 | Apr 5 |
| 2004 | Apr 17 |
| 2005 | Apr 14 |
| 2006 | Mar 13 |
| 2007 | Mar 29 |
| 2008 | Apr 30 |
| 2009 | Apr 30 |
| 2010 | May 23 |
| 2011 | Apr 9 |
| 2012 | Apr 6 |
| 2013 | Mar 9 |
| 2014 | Feb 4 |
| 2015 | Apr 4 |
| 2017 | Feb 28 |
| 2018 | Mar 25 |
| 2019 | Feb 23 |
| 2020 | Mar 27 |
| 2021 | Mar 21 |
| 2022 | May 11 |
| 2023 | Mar 1 |
| 2024 | Jan 12 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1999 | 219 |
| 2000 | 284 |
| 2001 | 224 |
| 2002 | 225 |
| 2003 | 209 |
| 2004 | 216 |
| 2005 | 218 |
| 2006 | 241 |
| 2007 | 235 |
| 2008 | 221 |
| 2009 | 196 |
| 2010 | 183 |
| 2011 | 200 |
| 2012 | 217 |
| 2013 | 239 |
| 2014 | 285 |
| 2015 | 220 |
| 2016 | 338 |
| 2017 | 262 |
| 2018 | 228 |
| 2019 | 249 |
| 2020 | 227 |
| 2021 | 263 |
| 2022 | 175 |
| 2023 | 268 |
| 2024 | 310 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1999 | 16.2 °C |
| 2000 | 17.3 °C |
| 2001 | 17.0 °C |
| 2002 | 16.7 °C |
| 2003 | 16.8 °C |
| 2004 | 17.5 °C |
| 2005 | 16.1 °C |
| 2006 | 17.2 °C |
| 2007 | 17.4 °C |
| 2008 | 17.1 °C |
| 2009 | 16.9 °C |
| 2010 | 15.8 °C |
| 2011 | 16.3 °C |
| 2012 | 16.8 °C |
| 2013 | 18.0 °C |
| 2014 | 17.5 °C |
| 2015 | 17.4 °C |
| 2016 | 17.3 °C |
| 2017 | 18.6 °C |
| 2018 | 16.9 °C |
| 2019 | 17.7 °C |
| 2020 | 18.5 °C |
| 2021 | 17.4 °C |
| 2022 | 18.2 °C |
| 2023 | 17.6 °C |
| 2024 | 17.8 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Napa Co Ap (NOAA GHCN-Daily). Years with too many missing days are left out.