Frost dates for 97075 — Beaverton, OR
Last spring frostFeb 11median date
First fall frostDec 5median date
Growing season297 daysfrost-free
Hardiness zone9aZone 9a
How Beaverton compares
- In 8 years out of 10, the last spring frost in Beaverton falls between December 26 and March 5, a 69-day window. The first fall frost falls between November 11 and January 12.
- The median last frost is 64 days earlier than the Oregon median of Apr 16.
- Its 297-day growing season is among the longest of the 345 Oregon places with a regular frost season.
- The last frost is 20 days earlier 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 10 nights a year at or below 32°F.
- Compared with Portland, OR, 11 km away, the last frost here is 14 days earlier than there and the growing season is 18 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 26 |
| 50% (median) | February 11 |
| 10% (safe for tender plants) | March 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 11 |
| 50% (median) | December 5 |
| 90% (late) | January 12 |
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 Beaverton, OR
Frost dates for 97075 — Beaverton, OR — last frost Feb 11, first frost Dec 5, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Nov 19 to Dec 3Transplant outside: Jan 14 to Jan 28
Start indoors: Dec 3 to Dec 17Transplant outside: Feb 25 to Mar 11
Start indoors: Dec 3 to Dec 17Transplant outside: Feb 25 to Mar 11
Start indoors: Dec 17 to Dec 31Transplant outside: Feb 18 to Mar 4
Start indoors: Dec 17 to Dec 31Transplant outside: Jan 21 to Feb 4Sow outdoors: Jan 14 to Feb 18Plant for fall: Oct 10 to Nov 7
Start indoors: Dec 17 to Dec 31Transplant outside: Jan 14 to Jan 28Sow outdoors: Jan 14 to Jan 28Plant for fall: Sep 26 to Oct 17
Start indoors: Dec 17 to Dec 31Transplant outside: Jan 28 to Feb 11Plant for fall: Aug 29 to Sep 19
Start indoors: Dec 17 to Dec 31Transplant outside: Jan 21 to Feb 4Plant for fall: Aug 29 to Sep 19
Start indoors: Dec 17 to Dec 31Transplant outside: Jan 28 to Feb 11Plant for fall: Aug 29 to Sep 19
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Mar 4 to Mar 18Sow outdoors: Mar 4 to Mar 18
Start indoors: Dec 31 to Jan 14Start indoors: Dec 31 to Jan 14Transplant outside: Feb 18 to Mar 4
Sow outdoors: Dec 31 to Jan 21Sow outdoors: Dec 31 to Jan 21Plant for fall: Sep 12 to Oct 3
Sow outdoors: Dec 31 to Jan 21Sow outdoors: Dec 31 to Jan 21Plant for fall: Oct 10 to Oct 31
Sow outdoors: Jan 7 to Feb 18Plant for fall: Oct 24 to Nov 14
Start indoors: Jan 14 to Jan 21Transplant outside: Feb 25 to Mar 4Sow outdoors: Feb 18 to Mar 4Plant for fall: Sep 19 to Oct 3
Start indoors: Jan 14 to Jan 21Sow outdoors: Feb 18 to Mar 4Plant for fall: Sep 26 to Oct 10
Start indoors: Jan 14 to Jan 21Sow outdoors: Feb 18 to Mar 4
Start indoors: Jan 14 to Jan 21Transplant outside: Feb 25 to Mar 11
Sow outdoors: Jan 21 to Feb 18Plant for fall: Sep 12 to Sep 26
Sow outdoors: Jan 21 to Feb 18Plant for fall: Sep 26 to Oct 10
Sow outdoors: Jan 21 to Feb 11
Sow outdoors: Jan 28 to Feb 25Plant for fall: Sep 26 to Oct 10
Sow outdoors: Jan 28 to Feb 18Plant for fall: Oct 10 to Oct 31
Sow outdoors: Feb 18 to Mar 11Plant for fall: Sep 19 to Oct 3
Sow outdoors: Feb 18 to Mar 4
Transplant outside: Feb 25 to Mar 18
Plant for fall: Nov 21 to Dec 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Beaverton, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 19 – Dec 3 | Jan 14 – Jan 28 | — | — |
| Peppers | Dec 3 – Dec 17 | Feb 25 – Mar 11 | — | — |
| Eggplant | Dec 3 – Dec 17 | Feb 25 – Mar 11 | — | — |
| Tomatoes | Dec 17 – Dec 31 | Feb 18 – Mar 4 | — | — |
| Lettuce | Dec 17 – Dec 31 | Jan 21 – Feb 4 | Jan 14 – Feb 18 | Oct 10 – Nov 7 |
| Kale | Dec 17 – Dec 31 | Jan 14 – Jan 28 | Jan 14 – Jan 28 | Sep 26 – Oct 17 |
| Broccoli | Dec 17 – Dec 31 | Jan 28 – Feb 11 | — | Aug 29 – Sep 19 |
| Cabbage | Dec 17 – Dec 31 | Jan 21 – Feb 4 | — | Aug 29 – Sep 19 |
| Cauliflower | Dec 17 – Dec 31 | Jan 28 – Feb 11 | — | Aug 29 – Sep 19 |
| Okra | Dec 31 – Jan 14 | Mar 4 – Mar 18 | Mar 4 – Mar 18 | — |
| Basil | Dec 31 – Jan 14 | Feb 18 – Mar 4 | — | — |
| Peas | — | — | Dec 31 – Jan 21 | Sep 12 – Oct 3 |
| Spinach | — | — | Dec 31 – Jan 21 | Oct 10 – Oct 31 |
| Radishes | — | — | Jan 7 – Feb 18 | Oct 24 – Nov 14 |
| Cucumbers | Jan 14 – Jan 21 | Feb 25 – Mar 4 | Feb 18 – Mar 4 | Sep 19 – Oct 3 |
| Zucchini & Summer Squash | Jan 14 – Jan 21 | — | Feb 18 – Mar 4 | Sep 26 – Oct 10 |
| Winter Squash & Pumpkins | Jan 14 – Jan 21 | — | Feb 18 – Mar 4 | — |
| Melons & Watermelon | Jan 14 – Jan 21 | Feb 25 – Mar 11 | — | — |
| Carrots | — | — | Jan 21 – Feb 18 | Sep 12 – Sep 26 |
| Beets | — | — | Jan 21 – Feb 18 | Sep 26 – Oct 10 |
| Potatoes | — | — | Jan 21 – Feb 11 | — |
| Swiss Chard | — | — | Jan 28 – Feb 25 | Sep 26 – Oct 10 |
| Cilantro | — | — | Jan 28 – Feb 18 | Oct 10 – Oct 31 |
| Green Beans | — | — | Feb 18 – Mar 11 | Sep 19 – Oct 3 |
| Sweet Corn | — | — | Feb 18 – Mar 4 | — |
| Sweet Potatoes | — | Feb 25 – Mar 18 | — | — |
| Garlic | — | — | — | Nov 21 – Dec 26 |
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 Nature Park-Beaverton, OR weather station, 3 km away (elevation 184 ft (56 m)).
ZIP codes in Beaverton: 97003 97005 97006 97007 97008 97075 97076 97077 97078 97079
Frost dates near Beaverton
- Lake Oswego Mar 18 · Nov 18
- Portland Feb 25 · Dec 1
- Hillsboro Apr 16 · Oct 23
- Tualatin Apr 1 · Nov 6
- Marylhurst Mar 18 · Nov 18
- Sherwood Mar 21 · Nov 22
- West Linn Mar 18 · Nov 18
- Cornelius Apr 16 · Oct 26
Frequently asked questions
When is the last frost in Beaverton, OR?
The median last spring frost in Beaverton, OR is February 11. There is still about a 10% chance of frost after March 5, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Beaverton, OR?
The median first fall frost is December 5, with about a 10% chance of frost before November 11.
How long is the growing season in Beaverton, OR?
About 297 days between the median last spring frost and first fall frost.
What planting zone is Beaverton, OR?
Beaverton, OR is in USDA hardiness zone 9a.