Dayville, OR frost dates
Last spring frostMay 4median date
First fall frostOct 6median date
Growing season155 daysfrost-free
Hardiness zone7aZone 7a
How Dayville compares
- In 8 years out of 10, the last spring frost in Dayville falls between April 18 and May 23, a 35-day window. The first fall frost falls between September 21 and October 23.
- The median last frost is 18 days later than the Oregon median of Apr 16.
- Its 155-day growing season is longer than 28% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 18 days later than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 123 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 18 |
| 50% (median) | May 4 |
| 10% (safe for tender plants) | May 23 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 21 |
| 50% (median) | October 6 |
| 90% (late) | October 23 |
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 Dayville, OR
Dayville, OR frost dates — last frost May 4, first frost Oct 6, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Feb 9 to Feb 23Transplant outside: Apr 6 to Apr 20
Start indoors: Feb 23 to Mar 9Transplant outside: May 18 to Jun 1
Start indoors: Feb 23 to Mar 9Transplant outside: May 18 to Jun 1
Start indoors: Mar 9 to Mar 23Transplant outside: May 11 to May 25
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 13 to Apr 27Sow outdoors: Apr 6 to May 11Plant for fall: Aug 11 to Sep 8
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 6 to Apr 20Sow outdoors: Apr 6 to Apr 20Plant for fall: Jul 28 to Aug 18
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 20 to May 4Plant for fall: Jun 30 to Jul 21
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 13 to Apr 27Plant for fall: Jun 30 to Jul 21
Start indoors: Mar 9 to Mar 23Transplant outside: Apr 20 to May 4Plant for fall: Jun 30 to Jul 21
Start indoors: Mar 23 to Apr 6Transplant outside: May 25 to Jun 8Sow outdoors: May 25 to Jun 8
Start indoors: Mar 23 to Apr 6Transplant outside: May 11 to May 25
Sow outdoors: Mar 23 to Apr 13Plant for fall: Jul 14 to Aug 4
Sow outdoors: Mar 23 to Apr 13Plant for fall: Aug 11 to Sep 1
Sow outdoors: Mar 30 to May 11Plant for fall: Aug 25 to Sep 15
Start indoors: Apr 6 to Apr 13Transplant outside: May 18 to May 25Sow outdoors: May 11 to May 25Plant for fall: Jul 21 to Aug 4
Start indoors: Apr 6 to Apr 13Sow outdoors: May 11 to May 25Plant for fall: Jul 28 to Aug 11
Start indoors: Apr 6 to Apr 13Sow outdoors: May 11 to May 25
Start indoors: Apr 6 to Apr 13Transplant outside: May 18 to Jun 1
Sow outdoors: Apr 13 to May 11Plant for fall: Jul 14 to Jul 28
Sow outdoors: Apr 13 to May 11Plant for fall: Jul 28 to Aug 11
Sow outdoors: Apr 13 to May 4
Sow outdoors: Apr 20 to May 18Plant for fall: Jul 28 to Aug 11
Sow outdoors: Apr 20 to May 11Plant for fall: Aug 11 to Sep 1
Sow outdoors: May 11 to Jun 1Plant for fall: Jul 21 to Aug 4
Sow outdoors: May 11 to May 25
Transplant outside: May 18 to Jun 8
Plant for fall: Sep 22 to Oct 27
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Dayville, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 9 – Feb 23 | Apr 6 – Apr 20 | — | — |
| Peppers | Feb 23 – Mar 9 | May 18 – Jun 1 | — | — |
| Eggplant | Feb 23 – Mar 9 | May 18 – Jun 1 | — | — |
| Tomatoes | Mar 9 – Mar 23 | May 11 – May 25 | — | — |
| Lettuce | Mar 9 – Mar 23 | Apr 13 – Apr 27 | Apr 6 – May 11 | Aug 11 – Sep 8 |
| Kale | Mar 9 – Mar 23 | Apr 6 – Apr 20 | Apr 6 – Apr 20 | Jul 28 – Aug 18 |
| Broccoli | Mar 9 – Mar 23 | Apr 20 – May 4 | — | Jun 30 – Jul 21 |
| Cabbage | Mar 9 – Mar 23 | Apr 13 – Apr 27 | — | Jun 30 – Jul 21 |
| Cauliflower | Mar 9 – Mar 23 | Apr 20 – May 4 | — | Jun 30 – Jul 21 |
| Okra | Mar 23 – Apr 6 | May 25 – Jun 8 | May 25 – Jun 8 | — |
| Basil | Mar 23 – Apr 6 | May 11 – May 25 | — | — |
| Peas | — | — | Mar 23 – Apr 13 | Jul 14 – Aug 4 |
| Spinach | — | — | Mar 23 – Apr 13 | Aug 11 – Sep 1 |
| Radishes | — | — | Mar 30 – May 11 | Aug 25 – Sep 15 |
| Cucumbers | Apr 6 – Apr 13 | May 18 – May 25 | May 11 – May 25 | Jul 21 – Aug 4 |
| Zucchini & Summer Squash | Apr 6 – Apr 13 | — | May 11 – May 25 | Jul 28 – Aug 11 |
| Winter Squash & Pumpkins | Apr 6 – Apr 13 | — | May 11 – May 25 | — |
| Melons & Watermelon | Apr 6 – Apr 13 | May 18 – Jun 1 | — | — |
| Carrots | — | — | Apr 13 – May 11 | Jul 14 – Jul 28 |
| Beets | — | — | Apr 13 – May 11 | Jul 28 – Aug 11 |
| Potatoes | — | — | Apr 13 – May 4 | — |
| Swiss Chard | — | — | Apr 20 – May 18 | Jul 28 – Aug 11 |
| Cilantro | — | — | Apr 20 – May 11 | Aug 11 – Sep 1 |
| Green Beans | — | — | May 11 – Jun 1 | Jul 21 – Aug 4 |
| Sweet Corn | — | — | May 11 – May 25 | — |
| Sweet Potatoes | — | May 18 – Jun 8 | — | — |
| Garlic | — | — | — | Sep 22 – Oct 27 |
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 Dayville 8 Nw, OR weather station, 14 km away (elevation 2,260 ft (689 m)).
Frost dates near Dayville
- Kimberly May 9 · Sep 27
- Mount Vernon May 28 · Sep 18
- Paulina frost any month
- Monument May 9 · Sep 27
- John Day May 28 · Sep 18
- Spray May 9 · Sep 27
- Long Creek Jun 5 · Sep 14
- Canyon City May 28 · Sep 18
- Mitchell May 22 · Oct 4
- Seneca frost any month
Frequently asked questions
When is the last frost in Dayville, OR?
The median last spring frost in Dayville, OR is May 4. There is still about a 10% chance of frost after May 23, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Dayville, OR?
The median first fall frost is October 6, with about a 10% chance of frost before September 21.
How long is the growing season in Dayville, OR?
About 155 days between the median last spring frost and first fall frost.
What planting zone is Dayville, OR?
Dayville, OR is in USDA hardiness zone 7a.