When to plant in Okanogan, WA
Planting dates worked out from Okanogan's own frost records, not a generic zone chart.
Safe to plant out
May 22
1 year in 10 has a later frost
Average last frost
May 9
about a 50% chance of a later one
Average first fall frost
Oct 3
1 year in 10 by Sep 22
Frost-free days
143
median, 1991–2020
Station used: Omak · 12.0 km away · station 398 m, town 15 m. How we match towns to stations
The station sits 382 m higher than the town, so frost dates here may be off by a week or more. Check them against local experience.
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Mar 27 – Apr 10 | May 22 – Jun 5 | Jul 16 |
| Sweet pepper | Mar 13 – Mar 27 | May 22 – Jun 5 | Jul 21 |
| Lettuce (leaf) | Mar 7 – Mar 14 | Apr 11 – Apr 25 | May 21 |
| Peas | — | Mar 28 – Apr 25 | May 22 |
| Bush beans | — | May 15 – Jun 5 | Jul 4 |
| Carrot | — | Apr 18 – May 30 | Jun 17 |
| Beet | — | Apr 11 – May 23 | May 31 |
| Potato | — | Apr 18 – May 9 | Jun 27 |
| Kale | Feb 28 – Mar 14 | Apr 11 – Apr 25 | May 24 |
| Broccoli | Feb 28 – Mar 14 | Apr 11 – May 2 | Jun 10 |
| Cucumber | Apr 24 – May 1 | May 22 – Jun 5 | Jul 11 |
| Summer squash and zucchini | Apr 24 – May 1 | May 22 – Jun 5 | Jul 6 |
| Winter squash | Apr 24 – May 1 | May 22 – Jun 5 | Aug 10 |
| Sweet corn | — | May 15 – Jun 5 | Jul 14 |
| Onion (from sets) | — | Apr 11 – May 2 | Jul 10 |
| Garlic | — | Sep 19 – Oct 17 (fall) | following summer |
| Spinach | — | Mar 28 – Apr 25 | May 5 |
| Basil | Apr 10 – Apr 24 | May 22 – Jun 5 | Jul 18 |
Okanogan'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 |
|---|---|
| 1998 | May 16 |
| 1999 | Jun 9 |
| 2000 | May 13 |
| 2001 | May 6 |
| 2002 | May 6 |
| 2003 | May 19 |
| 2004 | May 12 |
| 2005 | May 23 |
| 2006 | May 9 |
| 2007 | May 20 |
| 2008 | May 9 |
| 2009 | May 13 |
| 2010 | May 24 |
| 2011 | May 4 |
| 2012 | May 12 |
| 2013 | May 1 |
| 2014 | Apr 28 |
| 2015 | May 9 |
| 2016 | Mar 26 |
| 2017 | May 13 |
| 2018 | Apr 18 |
| 2019 | May 2 |
| 2020 | May 4 |
| 2021 | May 8 |
| 2022 | May 13 |
| 2023 | Apr 20 |
| 2024 | May 7 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1998 | 139 |
| 1999 | 110 |
| 2000 | 131 |
| 2001 | 151 |
| 2002 | 138 |
| 2003 | 143 |
| 2004 | 150 |
| 2005 | 127 |
| 2006 | 130 |
| 2007 | 126 |
| 2008 | 136 |
| 2009 | 137 |
| 2010 | 139 |
| 2011 | 147 |
| 2012 | 145 |
| 2013 | 155 |
| 2014 | 136 |
| 2015 | 177 |
| 2016 | 198 |
| 2017 | 145 |
| 2018 | 179 |
| 2019 | 156 |
| 2020 | 163 |
| 2021 | 151 |
| 2022 | 162 |
| 2023 | 188 |
| 2024 | 150 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1998 | 18.3 °C |
| 1999 | 16.0 °C |
| 2000 | 16.5 °C |
| 2001 | 17.3 °C |
| 2002 | 16.9 °C |
| 2003 | 17.8 °C |
| 2004 | 17.9 °C |
| 2005 | 17.1 °C |
| 2006 | 17.7 °C |
| 2007 | 17.2 °C |
| 2008 | 16.4 °C |
| 2009 | 17.9 °C |
| 2010 | 16.2 °C |
| 2011 | 15.8 °C |
| 2012 | 17.3 °C |
| 2013 | 18.0 °C |
| 2014 | 18.5 °C |
| 2015 | 19.0 °C |
| 2016 | 18.4 °C |
| 2017 | 18.2 °C |
| 2018 | 18.2 °C |
| 2019 | 18.2 °C |
| 2020 | 18.5 °C |
| 2021 | 19.5 °C |
| 2022 | 18.1 °C |
| 2023 | 19.5 °C |
| 2024 | 18.8 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Omak (NOAA GHCN-Daily). Years with too many missing days are left out.