Arlington, OR frost dates
Last spring frostApr 6median date
First fall frostOct 21median date
Growing season198 daysfrost-free
Hardiness zone7bZone 7b
How Arlington compares
- In 8 years out of 10, the last spring frost in Arlington falls between March 22 and April 28, a 37-day window. The first fall frost falls between October 6 and November 7.
- The median last frost is 10 days earlier than the Oregon median of Apr 16.
- Its 198-day growing season is longer than 54% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is typical for zone 7b, where the median is Apr 5.
- The weather station records an average of 73 nights a year at or below 32°F.
- Compared with Kennewick, WA, 97 km away, the last frost here is 9 days later than there and the growing season is 18 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 22 |
| 50% (median) | April 6 |
| 10% (safe for tender plants) | April 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 6 |
| 50% (median) | October 21 |
| 90% (late) | November 7 |
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 Arlington, OR
Arlington, OR frost dates — last frost Apr 6, first frost Oct 21, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Jan 12 to Jan 26Transplant outside: Mar 9 to Mar 23
Start indoors: Jan 26 to Feb 9Transplant outside: Apr 20 to May 4
Start indoors: Jan 26 to Feb 9Transplant outside: Apr 20 to May 4
Start indoors: Feb 9 to Feb 23Transplant outside: Apr 13 to Apr 27
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 16 to Mar 30Sow outdoors: Mar 9 to Apr 13Plant for fall: Aug 26 to Sep 23
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 9 to Mar 23Sow outdoors: Mar 9 to Mar 23Plant for fall: Aug 12 to Sep 2
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 23 to Apr 6Plant for fall: Jul 15 to Aug 5
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 16 to Mar 30Plant for fall: Jul 15 to Aug 5
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 23 to Apr 6Plant for fall: Jul 15 to Aug 5
Start indoors: Feb 23 to Mar 9Transplant outside: Apr 27 to May 11Sow outdoors: Apr 27 to May 11
Start indoors: Feb 23 to Mar 9Transplant outside: Apr 13 to Apr 27
Sow outdoors: Feb 23 to Mar 16Plant for fall: Jul 29 to Aug 19
Sow outdoors: Feb 23 to Mar 16Plant for fall: Aug 26 to Sep 16
Sow outdoors: Mar 2 to Apr 13Plant for fall: Sep 9 to Sep 30
Start indoors: Mar 9 to Mar 16Transplant outside: Apr 20 to Apr 27Sow outdoors: Apr 13 to Apr 27Plant for fall: Aug 5 to Aug 19
Start indoors: Mar 9 to Mar 16Sow outdoors: Apr 13 to Apr 27Plant for fall: Aug 12 to Aug 26
Start indoors: Mar 9 to Mar 16Sow outdoors: Apr 13 to Apr 27
Start indoors: Mar 9 to Mar 16Transplant outside: Apr 20 to May 4
Sow outdoors: Mar 16 to Apr 13Plant for fall: Jul 29 to Aug 12
Sow outdoors: Mar 16 to Apr 13Plant for fall: Aug 12 to Aug 26
Sow outdoors: Mar 16 to Apr 6
Sow outdoors: Mar 23 to Apr 20Plant for fall: Aug 12 to Aug 26
Sow outdoors: Mar 23 to Apr 13Plant for fall: Aug 26 to Sep 16
Sow outdoors: Apr 13 to May 4Plant for fall: Aug 5 to Aug 19
Sow outdoors: Apr 13 to Apr 27
Transplant outside: Apr 20 to May 11
Plant for fall: Oct 7 to Nov 11
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Arlington, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 12 – Jan 26 | Mar 9 – Mar 23 | — | — |
| Peppers | Jan 26 – Feb 9 | Apr 20 – May 4 | — | — |
| Eggplant | Jan 26 – Feb 9 | Apr 20 – May 4 | — | — |
| Tomatoes | Feb 9 – Feb 23 | Apr 13 – Apr 27 | — | — |
| Lettuce | Feb 9 – Feb 23 | Mar 16 – Mar 30 | Mar 9 – Apr 13 | Aug 26 – Sep 23 |
| Kale | Feb 9 – Feb 23 | Mar 9 – Mar 23 | Mar 9 – Mar 23 | Aug 12 – Sep 2 |
| Broccoli | Feb 9 – Feb 23 | Mar 23 – Apr 6 | — | Jul 15 – Aug 5 |
| Cabbage | Feb 9 – Feb 23 | Mar 16 – Mar 30 | — | Jul 15 – Aug 5 |
| Cauliflower | Feb 9 – Feb 23 | Mar 23 – Apr 6 | — | Jul 15 – Aug 5 |
| Okra | Feb 23 – Mar 9 | Apr 27 – May 11 | Apr 27 – May 11 | — |
| Basil | Feb 23 – Mar 9 | Apr 13 – Apr 27 | — | — |
| Peas | — | — | Feb 23 – Mar 16 | Jul 29 – Aug 19 |
| Spinach | — | — | Feb 23 – Mar 16 | Aug 26 – Sep 16 |
| Radishes | — | — | Mar 2 – Apr 13 | Sep 9 – Sep 30 |
| Cucumbers | Mar 9 – Mar 16 | Apr 20 – Apr 27 | Apr 13 – Apr 27 | Aug 5 – Aug 19 |
| Zucchini & Summer Squash | Mar 9 – Mar 16 | — | Apr 13 – Apr 27 | Aug 12 – Aug 26 |
| Winter Squash & Pumpkins | Mar 9 – Mar 16 | — | Apr 13 – Apr 27 | — |
| Melons & Watermelon | Mar 9 – Mar 16 | Apr 20 – May 4 | — | — |
| Carrots | — | — | Mar 16 – Apr 13 | Jul 29 – Aug 12 |
| Beets | — | — | Mar 16 – Apr 13 | Aug 12 – Aug 26 |
| Potatoes | — | — | Mar 16 – Apr 6 | — |
| Swiss Chard | — | — | Mar 23 – Apr 20 | Aug 12 – Aug 26 |
| Cilantro | — | — | Mar 23 – Apr 13 | Aug 26 – Sep 16 |
| Green Beans | — | — | Apr 13 – May 4 | Aug 5 – Aug 19 |
| Sweet Corn | — | — | Apr 13 – Apr 27 | — |
| Sweet Potatoes | — | Apr 20 – May 11 | — | — |
| Garlic | — | — | — | Oct 7 – Nov 11 |
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 Arlington, OR weather station, 6 km away (elevation 276 ft (84 m)).
Frost dates near Arlington
- Mikkalo May 10 · Oct 7
- Ione Apr 26 · Oct 19
- Boardman Apr 14 · Oct 21
- Rufus May 19 · Sep 25
- Wasco May 12 · Oct 4
- Moro May 12 · Oct 4
- Lexington Apr 26 · Oct 19
- Condon May 10 · Oct 7
- Irrigon Apr 14 · Oct 21
- Grass Valley May 15 · Oct 11
Frequently asked questions
When is the last frost in Arlington, OR?
The median last spring frost in Arlington, OR is April 6. There is still about a 10% chance of frost after April 28, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Arlington, OR?
The median first fall frost is October 21, with about a 10% chance of frost before October 6.
How long is the growing season in Arlington, OR?
About 198 days between the median last spring frost and first fall frost.
What planting zone is Arlington, OR?
Arlington, OR is in USDA hardiness zone 7b.