When to plant in Oakville, ON
Planting dates worked out from Oakville's own frost records, not a generic zone chart.
Safe to plant out
Apr 21
1 year in 10 has a later frost
Average last frost
Apr 9
about a 50% chance of a later one
Average first fall frost
Nov 15
1 year in 10 by Nov 3
Frost-free days
219
median, 1991–2020
Station used: Burlington Piers (Aut) · 19.2 km away · station 77 m, town 99 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 19 – Apr 2 | May 14 – May 28 | Jul 8 |
| Sweet pepper | Mar 5 – Mar 19 | May 14 – May 28 | Jul 13 |
| Lettuce (leaf) | Mar 6 – Mar 13 | Apr 10 – Apr 24 | May 20 |
| Peas | — | Apr 10 – May 8 | Jun 4 |
| Bush beans | — | May 9 – May 30 | Jun 28 |
| Carrot | — | Apr 21 – Jun 2 | Jun 20 |
| Beet | — | Apr 21 – Jun 2 | Jun 10 |
| Potato | — | Apr 21 – May 12 | Jun 30 |
| Kale | Mar 6 – Mar 20 | Apr 17 – May 1 | May 30 |
| Broccoli | Feb 27 – Mar 13 | Apr 10 – May 1 | Jun 9 |
| Cucumber | Apr 16 – Apr 23 | May 14 – May 28 | Jul 3 |
| Summer squash and zucchini | Apr 16 – Apr 23 | May 14 – May 28 | Jun 28 |
| Winter squash | Apr 16 – Apr 23 | May 14 – May 28 | Aug 2 |
| Sweet corn | — | May 9 – May 30 | Jul 8 |
| Onion (from sets) | — | Apr 10 – May 1 | Jul 9 |
| Garlic | — | Oct 10 – Nov 7 (fall) | following summer |
| Spinach | — | Apr 10 – May 8 | May 18 |
| Basil | Apr 2 – Apr 16 | May 14 – May 28 | Jul 10 |
Oakville'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 |
|---|---|
| 1996 | Apr 9 |
| 1997 | Apr 11 |
| 1998 | Mar 25 |
| 1999 | Mar 26 |
| 2000 | Apr 12 |
| 2001 | Apr 19 |
| 2002 | Apr 7 |
| 2004 | Apr 6 |
| 2005 | Mar 27 |
| 2006 | Apr 9 |
| 2007 | Apr 11 |
| 2008 | Apr 3 |
| 2009 | Apr 7 |
| 2011 | Apr 8 |
| 2012 | Mar 30 |
| 2013 | Apr 21 |
| 2014 | Apr 16 |
| 2015 | Apr 23 |
| 2016 | Apr 10 |
| 2017 | Mar 23 |
| 2018 | Apr 20 |
| 2019 | Apr 4 |
| 2020 | May 9 |
| 2021 | Apr 22 |
| 2022 | Apr 17 |
| 2023 | Apr 8 |
| 2024 | Mar 30 |
| 2025 | Apr 9 |
| 2026 | Apr 20 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1997 | 214 |
| 1999 | 233 |
| 2000 | 219 |
| 2001 | 245 |
| 2002 | 213 |
| 2004 | 215 |
| 2005 | 234 |
| 2006 | 208 |
| 2007 | 220 |
| 2008 | 227 |
| 2009 | 240 |
| 2011 | 223 |
| 2012 | 239 |
| 2013 | 195 |
| 2014 | 199 |
| 2015 | 212 |
| 2016 | 223 |
| 2017 | 230 |
| 2018 | 203 |
| 2019 | 216 |
| 2020 | 174 |
| 2021 | 213 |
| 2022 | 212 |
| 2023 | 213 |
| 2024 | 243 |
| 2025 | 213 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1998 | 17.3 °C |
| 1999 | 17.7 °C |
| 2000 | 15.8 °C |
| 2001 | 16.9 °C |
| 2002 | 17.0 °C |
| 2005 | 17.6 °C |
| 2007 | 16.9 °C |
| 2008 | 16.4 °C |
| 2009 | 15.9 °C |
| 2010 | 17.5 °C |
| 2011 | 16.7 °C |
| 2012 | 18.0 °C |
| 2013 | 16.2 °C |
| 2014 | 15.8 °C |
| 2015 | 16.9 °C |
| 2016 | 17.8 °C |
| 2017 | 16.8 °C |
| 2018 | 17.2 °C |
| 2019 | 16.2 °C |
| 2020 | 16.8 °C |
| 2021 | 17.5 °C |
| 2022 | 17.0 °C |
| 2023 | 17.1 °C |
| 2024 | 17.7 °C |
| 2025 | 17.1 °C |
| 2026 | 17.1 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Burlington Piers (Aut) (NOAA GHCN-Daily, from Environment and Climate Change Canada). Years with too many missing days are left out.