Olga, WA frost dates
Last spring frostFeb 26median date
First fall frostNov 29median date
Growing season276 daysfrost-free
Hardiness zone8bZone 8b
How Olga compares
- In 8 years out of 10, the last spring frost in Olga falls between January 23 and March 23, a 59-day window. The first fall frost falls between November 10 and December 23.
- The median last frost is 54 days earlier than the Washington median of Apr 21.
- Its 276-day growing season is among the longest of the 491 Washington places with a regular frost season.
- The last frost is 18 days earlier than the zone 8b median of Mar 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8b chart.
- The weather station records an average of 32 nights a year at or below 32°F.
- Compared with Bellingham, WA, 31 km away, the last frost here is 34 days earlier than there and the growing season is 61 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 23 |
| 50% (median) | February 26 |
| 10% (safe for tender plants) | March 23 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 10 |
| 50% (median) | November 29 |
| 90% (late) | December 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 Olga, WA
Olga, WA frost dates — last frost Feb 26, first frost Nov 29, zone 8b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 4 to Dec 18Transplant outside: Jan 29 to Feb 12
Start indoors: Dec 18 to Jan 1Start indoors: Dec 18 to Jan 1Transplant outside: Mar 12 to Mar 26
Start indoors: Dec 18 to Jan 1Start indoors: Dec 18 to Jan 1Transplant outside: Mar 12 to Mar 26
Start indoors: Jan 1 to Jan 15Transplant outside: Mar 5 to Mar 19
Start indoors: Jan 1 to Jan 15Transplant outside: Feb 5 to Feb 19Sow outdoors: Jan 29 to Mar 5Plant for fall: Oct 4 to Nov 1
Start indoors: Jan 1 to Jan 15Transplant outside: Jan 29 to Feb 12Sow outdoors: Jan 29 to Feb 12Plant for fall: Sep 20 to Oct 11
Start indoors: Jan 1 to Jan 15Transplant outside: Feb 12 to Feb 26Plant for fall: Aug 23 to Sep 13
Start indoors: Jan 1 to Jan 15Transplant outside: Feb 5 to Feb 19Plant for fall: Aug 23 to Sep 13
Start indoors: Jan 1 to Jan 15Transplant outside: Feb 12 to Feb 26Plant for fall: Aug 23 to Sep 13
Start indoors: Jan 15 to Jan 29Transplant outside: Mar 19 to Apr 2Sow outdoors: Mar 19 to Apr 2
Start indoors: Jan 15 to Jan 29Transplant outside: Mar 5 to Mar 19
Sow outdoors: Jan 15 to Feb 5Plant for fall: Sep 6 to Sep 27
Sow outdoors: Jan 15 to Feb 5Plant for fall: Oct 4 to Oct 25
Sow outdoors: Jan 22 to Mar 5Plant for fall: Oct 18 to Nov 8
Start indoors: Jan 29 to Feb 5Transplant outside: Mar 12 to Mar 19Sow outdoors: Mar 5 to Mar 19Plant for fall: Sep 13 to Sep 27
Start indoors: Jan 29 to Feb 5Sow outdoors: Mar 5 to Mar 19Plant for fall: Sep 20 to Oct 4
Start indoors: Jan 29 to Feb 5Sow outdoors: Mar 5 to Mar 19
Start indoors: Jan 29 to Feb 5Transplant outside: Mar 12 to Mar 26
Sow outdoors: Feb 5 to Mar 5Plant for fall: Sep 6 to Sep 20
Sow outdoors: Feb 5 to Mar 5Plant for fall: Sep 20 to Oct 4
Sow outdoors: Feb 5 to Feb 26
Sow outdoors: Feb 12 to Mar 12Plant for fall: Sep 20 to Oct 4
Sow outdoors: Feb 12 to Mar 5Plant for fall: Oct 4 to Oct 25
Sow outdoors: Mar 5 to Mar 26Plant for fall: Sep 13 to Sep 27
Sow outdoors: Mar 5 to Mar 19
Transplant outside: Mar 12 to Apr 2
Plant for fall: Nov 15 to Dec 20
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Olga, WA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 4 – Dec 18 | Jan 29 – Feb 12 | — | — |
| Peppers | Dec 18 – Jan 1 | Mar 12 – Mar 26 | — | — |
| Eggplant | Dec 18 – Jan 1 | Mar 12 – Mar 26 | — | — |
| Tomatoes | Jan 1 – Jan 15 | Mar 5 – Mar 19 | — | — |
| Lettuce | Jan 1 – Jan 15 | Feb 5 – Feb 19 | Jan 29 – Mar 5 | Oct 4 – Nov 1 |
| Kale | Jan 1 – Jan 15 | Jan 29 – Feb 12 | Jan 29 – Feb 12 | Sep 20 – Oct 11 |
| Broccoli | Jan 1 – Jan 15 | Feb 12 – Feb 26 | — | Aug 23 – Sep 13 |
| Cabbage | Jan 1 – Jan 15 | Feb 5 – Feb 19 | — | Aug 23 – Sep 13 |
| Cauliflower | Jan 1 – Jan 15 | Feb 12 – Feb 26 | — | Aug 23 – Sep 13 |
| Okra | Jan 15 – Jan 29 | Mar 19 – Apr 2 | Mar 19 – Apr 2 | — |
| Basil | Jan 15 – Jan 29 | Mar 5 – Mar 19 | — | — |
| Peas | — | — | Jan 15 – Feb 5 | Sep 6 – Sep 27 |
| Spinach | — | — | Jan 15 – Feb 5 | Oct 4 – Oct 25 |
| Radishes | — | — | Jan 22 – Mar 5 | Oct 18 – Nov 8 |
| Cucumbers | Jan 29 – Feb 5 | Mar 12 – Mar 19 | Mar 5 – Mar 19 | Sep 13 – Sep 27 |
| Zucchini & Summer Squash | Jan 29 – Feb 5 | — | Mar 5 – Mar 19 | Sep 20 – Oct 4 |
| Winter Squash & Pumpkins | Jan 29 – Feb 5 | — | Mar 5 – Mar 19 | — |
| Melons & Watermelon | Jan 29 – Feb 5 | Mar 12 – Mar 26 | — | — |
| Carrots | — | — | Feb 5 – Mar 5 | Sep 6 – Sep 20 |
| Beets | — | — | Feb 5 – Mar 5 | Sep 20 – Oct 4 |
| Potatoes | — | — | Feb 5 – Feb 26 | — |
| Swiss Chard | — | — | Feb 12 – Mar 12 | Sep 20 – Oct 4 |
| Cilantro | — | — | Feb 12 – Mar 5 | Oct 4 – Oct 25 |
| Green Beans | — | — | Mar 5 – Mar 26 | Sep 13 – Sep 27 |
| Sweet Corn | — | — | Mar 5 – Mar 19 | — |
| Sweet Potatoes | — | Mar 12 – Apr 2 | — | — |
| Garlic | — | — | — | Nov 15 – Dec 20 |
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 Olga 2 Se, WA weather station, 2 km away (elevation 79 ft (24 m)).
Frost dates near Olga
- Blakely Island Feb 26 · Nov 29
- Orcas Mar 26 · Nov 10
- Eastsound Feb 26 · Nov 29
- Deer Harbor Mar 26 · Nov 10
- Shaw Island Mar 26 · Nov 10
- Lopez Island Mar 26 · Nov 10
- Lummi Island Apr 1 · Nov 2
- Waldron Mar 26 · Nov 10
- Anacortes Mar 8 · Nov 20
- Friday Harbor Mar 26 · Nov 10
Frequently asked questions
When is the last frost in Olga, WA?
The median last spring frost in Olga, WA is February 26. There is still about a 10% chance of frost after March 23, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Olga, WA?
The median first fall frost is November 29, with about a 10% chance of frost before November 10.
How long is the growing season in Olga, WA?
About 276 days between the median last spring frost and first fall frost.
What planting zone is Olga, WA?
Olga, WA is in USDA hardiness zone 8b.