Westlake, OR frost dates
Last spring frostMar 28median date
First fall frostNov 22median date
Growing season239 daysfrost-free
Hardiness zone9aZone 9a
How Westlake compares
- In 8 years out of 10, the last spring frost in Westlake falls between February 23 and April 21, a 57-day window. The first fall frost falls between October 28 and December 20.
- The median last frost is 19 days earlier than the Oregon median of Apr 16.
- Its 239-day growing season is longer than 81% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 25 days later than the zone 9a median of Mar 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9a chart.
- The weather station records an average of 28 nights a year at or below 32°F.
- Compared with Eugene, OR, 77 km away, the last frost here is 14 days earlier than there and the growing season is 44 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 23 |
| 50% (median) | March 28 |
| 10% (safe for tender plants) | April 21 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 28 |
| 50% (median) | November 22 |
| 90% (late) | December 20 |
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 Westlake, OR
Westlake, OR frost dates — last frost Mar 28, first frost Nov 22, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Jan 3 to Jan 17Transplant outside: Feb 28 to Mar 14
Start indoors: Jan 17 to Jan 31Transplant outside: Apr 11 to Apr 25
Start indoors: Jan 17 to Jan 31Transplant outside: Apr 11 to Apr 25
Start indoors: Jan 31 to Feb 14Transplant outside: Apr 4 to Apr 18
Start indoors: Jan 31 to Feb 14Transplant outside: Mar 7 to Mar 21Sow outdoors: Feb 28 to Apr 4Plant for fall: Sep 27 to Oct 25
Start indoors: Jan 31 to Feb 14Transplant outside: Feb 28 to Mar 14Sow outdoors: Feb 28 to Mar 14Plant for fall: Sep 13 to Oct 4
Start indoors: Jan 31 to Feb 14Transplant outside: Mar 14 to Mar 28Plant for fall: Aug 16 to Sep 6
Start indoors: Jan 31 to Feb 14Transplant outside: Mar 7 to Mar 21Plant for fall: Aug 16 to Sep 6
Start indoors: Jan 31 to Feb 14Transplant outside: Mar 14 to Mar 28Plant for fall: Aug 16 to Sep 6
Start indoors: Feb 14 to Feb 28Transplant outside: Apr 18 to May 2Sow outdoors: Apr 18 to May 2
Start indoors: Feb 14 to Feb 28Transplant outside: Apr 4 to Apr 18
Sow outdoors: Feb 14 to Mar 7Plant for fall: Aug 30 to Sep 20
Sow outdoors: Feb 14 to Mar 7Plant for fall: Sep 27 to Oct 18
Sow outdoors: Feb 21 to Apr 4Plant for fall: Oct 11 to Nov 1
Start indoors: Feb 28 to Mar 7Transplant outside: Apr 11 to Apr 18Sow outdoors: Apr 4 to Apr 18Plant for fall: Sep 6 to Sep 20
Start indoors: Feb 28 to Mar 7Sow outdoors: Apr 4 to Apr 18Plant for fall: Sep 13 to Sep 27
Start indoors: Feb 28 to Mar 7Sow outdoors: Apr 4 to Apr 18
Start indoors: Feb 28 to Mar 7Transplant outside: Apr 11 to Apr 25
Sow outdoors: Mar 7 to Apr 4Plant for fall: Aug 30 to Sep 13
Sow outdoors: Mar 7 to Apr 4Plant for fall: Sep 13 to Sep 27
Sow outdoors: Mar 7 to Mar 28
Sow outdoors: Mar 14 to Apr 11Plant for fall: Sep 13 to Sep 27
Sow outdoors: Mar 14 to Apr 4Plant for fall: Sep 27 to Oct 18
Sow outdoors: Apr 4 to Apr 25Plant for fall: Sep 6 to Sep 20
Sow outdoors: Apr 4 to Apr 18
Transplant outside: Apr 11 to May 2
Plant for fall: Nov 8 to Dec 13
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Westlake, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 3 – Jan 17 | Feb 28 – Mar 14 | — | — |
| Peppers | Jan 17 – Jan 31 | Apr 11 – Apr 25 | — | — |
| Eggplant | Jan 17 – Jan 31 | Apr 11 – Apr 25 | — | — |
| Tomatoes | Jan 31 – Feb 14 | Apr 4 – Apr 18 | — | — |
| Lettuce | Jan 31 – Feb 14 | Mar 7 – Mar 21 | Feb 28 – Apr 4 | Sep 27 – Oct 25 |
| Kale | Jan 31 – Feb 14 | Feb 28 – Mar 14 | Feb 28 – Mar 14 | Sep 13 – Oct 4 |
| Broccoli | Jan 31 – Feb 14 | Mar 14 – Mar 28 | — | Aug 16 – Sep 6 |
| Cabbage | Jan 31 – Feb 14 | Mar 7 – Mar 21 | — | Aug 16 – Sep 6 |
| Cauliflower | Jan 31 – Feb 14 | Mar 14 – Mar 28 | — | Aug 16 – Sep 6 |
| Okra | Feb 14 – Feb 28 | Apr 18 – May 2 | Apr 18 – May 2 | — |
| Basil | Feb 14 – Feb 28 | Apr 4 – Apr 18 | — | — |
| Peas | — | — | Feb 14 – Mar 7 | Aug 30 – Sep 20 |
| Spinach | — | — | Feb 14 – Mar 7 | Sep 27 – Oct 18 |
| Radishes | — | — | Feb 21 – Apr 4 | Oct 11 – Nov 1 |
| Cucumbers | Feb 28 – Mar 7 | Apr 11 – Apr 18 | Apr 4 – Apr 18 | Sep 6 – Sep 20 |
| Zucchini & Summer Squash | Feb 28 – Mar 7 | — | Apr 4 – Apr 18 | Sep 13 – Sep 27 |
| Winter Squash & Pumpkins | Feb 28 – Mar 7 | — | Apr 4 – Apr 18 | — |
| Melons & Watermelon | Feb 28 – Mar 7 | Apr 11 – Apr 25 | — | — |
| Carrots | — | — | Mar 7 – Apr 4 | Aug 30 – Sep 13 |
| Beets | — | — | Mar 7 – Apr 4 | Sep 13 – Sep 27 |
| Potatoes | — | — | Mar 7 – Mar 28 | — |
| Swiss Chard | — | — | Mar 14 – Apr 11 | Sep 13 – Sep 27 |
| Cilantro | — | — | Mar 14 – Apr 4 | Sep 27 – Oct 18 |
| Green Beans | — | — | Apr 4 – Apr 25 | Sep 6 – Sep 20 |
| Sweet Corn | — | — | Apr 4 – Apr 18 | — |
| Sweet Potatoes | — | Apr 11 – May 2 | — | — |
| Garlic | — | — | — | Nov 8 – Dec 13 |
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 Honeyman Sp, OR weather station, 6 km away (elevation 115 ft (35 m)).
Frost dates near Westlake
- Florence Apr 10 · Nov 15
- Mapleton Feb 15 · Dec 9
- Gardiner Mar 25 · Nov 24
- Reedsport Mar 25 · Nov 24
- Swisshome Feb 15 · Dec 9
- Scottsburg Apr 11 · Nov 6
- Walton Apr 18 · Oct 25
- Deadwood Feb 15 · Dec 9
- Lakeside Mar 25 · Nov 24
- Yachats Feb 19 · Dec 11
Frequently asked questions
When is the last frost in Westlake, OR?
The median last spring frost in Westlake, OR is March 28. There is still about a 10% chance of frost after April 21, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Westlake, OR?
The median first fall frost is November 22, with about a 10% chance of frost before October 28.
How long is the growing season in Westlake, OR?
About 239 days between the median last spring frost and first fall frost.
What planting zone is Westlake, OR?
Westlake, OR is in USDA hardiness zone 9a.