Arch Cape, OR frost dates
Last spring frostApr 2median date
First fall frostNov 12median date
Growing season224 daysfrost-free
Hardiness zone9aZone 9a
How Arch Cape compares
- In 8 years out of 10, the last spring frost in Arch Cape falls between March 4 and April 29, a 56-day window. The first fall frost falls between October 18 and December 6.
- The median last frost is 14 days earlier than the Oregon median of Apr 16.
- Its 224-day growing season is longer than 73% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 30 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 29 nights a year at or below 32°F.
- Compared with Hillsboro, OR, 84 km away, the last frost here is 14 days earlier than there and the growing season is 34 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 4 |
| 50% (median) | April 2 |
| 10% (safe for tender plants) | April 29 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 18 |
| 50% (median) | November 12 |
| 90% (late) | December 6 |
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 Arch Cape, OR
Arch Cape, OR frost dates — last frost Apr 2, first frost Nov 12, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Jan 8 to Jan 22Transplant outside: Mar 5 to Mar 19
Start indoors: Jan 22 to Feb 5Transplant outside: Apr 16 to Apr 30
Start indoors: Jan 22 to Feb 5Transplant outside: Apr 16 to Apr 30
Start indoors: Feb 5 to Feb 19Transplant outside: Apr 9 to Apr 23
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 12 to Mar 26Sow outdoors: Mar 5 to Apr 9Plant for fall: Sep 17 to Oct 15
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 5 to Mar 19Sow outdoors: Mar 5 to Mar 19Plant for fall: Sep 3 to Sep 24
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 19 to Apr 2Plant for fall: Aug 6 to Aug 27
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 12 to Mar 26Plant for fall: Aug 6 to Aug 27
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 19 to Apr 2Plant for fall: Aug 6 to Aug 27
Start indoors: Feb 19 to Mar 5Transplant outside: Apr 23 to May 7Sow outdoors: Apr 23 to May 7
Start indoors: Feb 19 to Mar 5Transplant outside: Apr 9 to Apr 23
Sow outdoors: Feb 19 to Mar 12Plant for fall: Aug 20 to Sep 10
Sow outdoors: Feb 19 to Mar 12Plant for fall: Sep 17 to Oct 8
Sow outdoors: Feb 26 to Apr 9Plant for fall: Oct 1 to Oct 22
Start indoors: Mar 5 to Mar 12Transplant outside: Apr 16 to Apr 23Sow outdoors: Apr 9 to Apr 23Plant for fall: Aug 27 to Sep 10
Start indoors: Mar 5 to Mar 12Sow outdoors: Apr 9 to Apr 23Plant for fall: Sep 3 to Sep 17
Start indoors: Mar 5 to Mar 12Sow outdoors: Apr 9 to Apr 23
Start indoors: Mar 5 to Mar 12Transplant outside: Apr 16 to Apr 30
Sow outdoors: Mar 12 to Apr 9Plant for fall: Aug 20 to Sep 3
Sow outdoors: Mar 12 to Apr 9Plant for fall: Sep 3 to Sep 17
Sow outdoors: Mar 12 to Apr 2
Sow outdoors: Mar 19 to Apr 16Plant for fall: Sep 3 to Sep 17
Sow outdoors: Mar 19 to Apr 9Plant for fall: Sep 17 to Oct 8
Sow outdoors: Apr 9 to Apr 30Plant for fall: Aug 27 to Sep 10
Sow outdoors: Apr 9 to Apr 23
Transplant outside: Apr 16 to May 7
Plant for fall: Oct 29 to Dec 3
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Arch Cape, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 8 – Jan 22 | Mar 5 – Mar 19 | — | — |
| Peppers | Jan 22 – Feb 5 | Apr 16 – Apr 30 | — | — |
| Eggplant | Jan 22 – Feb 5 | Apr 16 – Apr 30 | — | — |
| Tomatoes | Feb 5 – Feb 19 | Apr 9 – Apr 23 | — | — |
| Lettuce | Feb 5 – Feb 19 | Mar 12 – Mar 26 | Mar 5 – Apr 9 | Sep 17 – Oct 15 |
| Kale | Feb 5 – Feb 19 | Mar 5 – Mar 19 | Mar 5 – Mar 19 | Sep 3 – Sep 24 |
| Broccoli | Feb 5 – Feb 19 | Mar 19 – Apr 2 | — | Aug 6 – Aug 27 |
| Cabbage | Feb 5 – Feb 19 | Mar 12 – Mar 26 | — | Aug 6 – Aug 27 |
| Cauliflower | Feb 5 – Feb 19 | Mar 19 – Apr 2 | — | Aug 6 – Aug 27 |
| Okra | Feb 19 – Mar 5 | Apr 23 – May 7 | Apr 23 – May 7 | — |
| Basil | Feb 19 – Mar 5 | Apr 9 – Apr 23 | — | — |
| Peas | — | — | Feb 19 – Mar 12 | Aug 20 – Sep 10 |
| Spinach | — | — | Feb 19 – Mar 12 | Sep 17 – Oct 8 |
| Radishes | — | — | Feb 26 – Apr 9 | Oct 1 – Oct 22 |
| Cucumbers | Mar 5 – Mar 12 | Apr 16 – Apr 23 | Apr 9 – Apr 23 | Aug 27 – Sep 10 |
| Zucchini & Summer Squash | Mar 5 – Mar 12 | — | Apr 9 – Apr 23 | Sep 3 – Sep 17 |
| Winter Squash & Pumpkins | Mar 5 – Mar 12 | — | Apr 9 – Apr 23 | — |
| Melons & Watermelon | Mar 5 – Mar 12 | Apr 16 – Apr 30 | — | — |
| Carrots | — | — | Mar 12 – Apr 9 | Aug 20 – Sep 3 |
| Beets | — | — | Mar 12 – Apr 9 | Sep 3 – Sep 17 |
| Potatoes | — | — | Mar 12 – Apr 2 | — |
| Swiss Chard | — | — | Mar 19 – Apr 16 | Sep 3 – Sep 17 |
| Cilantro | — | — | Mar 19 – Apr 9 | Sep 17 – Oct 8 |
| Green Beans | — | — | Apr 9 – Apr 30 | Aug 27 – Sep 10 |
| Sweet Corn | — | — | Apr 9 – Apr 23 | — |
| Sweet Potatoes | — | Apr 16 – May 7 | — | — |
| Garlic | — | — | — | Oct 29 – Dec 3 |
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 Seaside, OR weather station, 20 km away (elevation 10 ft (3 m)).
Frost dates near Arch Cape
- Tolovana Park Apr 2 · Nov 12
- Cannon Beach Apr 2 · Nov 12
- Manzanita Apr 2 · Nov 12
- Nehalem Apr 2 · Nov 12
- Wheeler Apr 22 · Oct 21
- Seaside Apr 2 · Nov 12
- Rockaway Beach Apr 22 · Oct 21
- Garibaldi Apr 22 · Oct 21
- Bay City Apr 22 · Oct 21
- Warrenton Mar 26 · Nov 11
Frequently asked questions
When is the last frost in Arch Cape, OR?
The median last spring frost in Arch Cape, OR is April 2. There is still about a 10% chance of frost after April 29, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Arch Cape, OR?
The median first fall frost is November 12, with about a 10% chance of frost before October 18.
How long is the growing season in Arch Cape, OR?
About 224 days between the median last spring frost and first fall frost.
What planting zone is Arch Cape, OR?
Arch Cape, OR is in USDA hardiness zone 9a.