Republic, WA frost dates
Last spring frostMay 30median date
First fall frostSep 10median date
Growing season103 daysfrost-free
Hardiness zone6aZone 6a
How Republic compares
- In 8 years out of 10, the last spring frost in Republic falls between May 11 and June 17, a 37-day window. The first fall frost falls between August 28 and September 25.
- The median last frost is 39 days later than the Washington median of Apr 21.
- Its 103-day growing season is among the shortest of the 491 Washington places with a regular frost season.
- The last frost is 31 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 188 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 11 |
| 50% (median) | May 30 |
| 10% (safe for tender plants) | June 17 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 28 |
| 50% (median) | September 10 |
| 90% (late) | September 25 |
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 Republic, WA
Republic, WA frost dates — last frost May 30, first frost Sep 10, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Mar 7 to Mar 21Transplant outside: May 2 to May 16
Start indoors: Mar 21 to Apr 4Transplant outside: Jun 13 to Jun 27
Start indoors: Mar 21 to Apr 4Transplant outside: Jun 13 to Jun 27
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 9 to May 23Sow outdoors: May 2 to Jun 6Plant for fall: Jul 16 to Aug 13
Start indoors: Apr 4 to Apr 18Transplant outside: May 2 to May 16Sow outdoors: May 2 to May 16Plant for fall: Jul 2 to Jul 23
Start indoors: Apr 4 to Apr 18Transplant outside: May 16 to May 30
Start indoors: Apr 4 to Apr 18Transplant outside: May 9 to May 23
Start indoors: Apr 4 to Apr 18Transplant outside: May 16 to May 30
Start indoors: Apr 18 to May 2Transplant outside: Jun 20 to Jul 4Sow outdoors: Jun 20 to Jul 4
Start indoors: Apr 18 to May 2Transplant outside: Jun 6 to Jun 20
Sow outdoors: Apr 18 to May 9Plant for fall: Jun 18 to Jul 9
Sow outdoors: Apr 18 to May 9Plant for fall: Jul 16 to Aug 6
Sow outdoors: Apr 25 to Jun 6Plant for fall: Jul 30 to Aug 20
Start indoors: May 2 to May 9Transplant outside: Jun 13 to Jun 20Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Transplant outside: Jun 13 to Jun 27
Sow outdoors: May 9 to Jun 6
Sow outdoors: May 9 to Jun 6Plant for fall: Jul 2 to Jul 16
Sow outdoors: May 9 to May 30
Sow outdoors: May 16 to Jun 13Plant for fall: Jul 2 to Jul 16
Sow outdoors: May 16 to Jun 6Plant for fall: Jul 16 to Aug 6
Sow outdoors: Jun 6 to Jun 27
Sow outdoors: Jun 6 to Jun 20
Transplant outside: Jun 13 to Jul 4
Plant for fall: Aug 27 to Oct 1
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Republic, WA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 7 – Mar 21 | May 2 – May 16 | — | — |
| Peppers | Mar 21 – Apr 4 | Jun 13 – Jun 27 | — | — |
| Eggplant | Mar 21 – Apr 4 | Jun 13 – Jun 27 | — | — |
| Tomatoes | Apr 4 – Apr 18 | Jun 6 – Jun 20 | — | — |
| Lettuce | Apr 4 – Apr 18 | May 9 – May 23 | May 2 – Jun 6 | Jul 16 – Aug 13 |
| Kale | Apr 4 – Apr 18 | May 2 – May 16 | May 2 – May 16 | Jul 2 – Jul 23 |
| Broccoli | Apr 4 – Apr 18 | May 16 – May 30 | — | — |
| Cabbage | Apr 4 – Apr 18 | May 9 – May 23 | — | — |
| Cauliflower | Apr 4 – Apr 18 | May 16 – May 30 | — | — |
| Okra | Apr 18 – May 2 | Jun 20 – Jul 4 | Jun 20 – Jul 4 | — |
| Basil | Apr 18 – May 2 | Jun 6 – Jun 20 | — | — |
| Peas | — | — | Apr 18 – May 9 | Jun 18 – Jul 9 |
| Spinach | — | — | Apr 18 – May 9 | Jul 16 – Aug 6 |
| Radishes | — | — | Apr 25 – Jun 6 | Jul 30 – Aug 20 |
| Cucumbers | May 2 – May 9 | Jun 13 – Jun 20 | Jun 6 – Jun 20 | — |
| Zucchini & Summer Squash | May 2 – May 9 | — | Jun 6 – Jun 20 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 103 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 2 – May 9 | — | Jun 6 – Jun 20 | — |
| Melons & Watermelon | May 2 – May 9 | Jun 13 – Jun 27 | — | — |
| Carrots | — | — | May 9 – Jun 6 | — |
| Beets | — | — | May 9 – Jun 6 | Jul 2 – Jul 16 |
| Potatoes | — | — | May 9 – May 30 | — |
| Swiss Chard | — | — | May 16 – Jun 13 | Jul 2 – Jul 16 |
| Cilantro | — | — | May 16 – Jun 6 | Jul 16 – Aug 6 |
| Green Beans | — | — | Jun 6 – Jun 27 | — |
| Sweet Corn | — | — | Jun 6 – Jun 20 | — |
| Sweet Potatoes Warning: Your frost-free season is about 103 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 13 – Jul 4 | — | — |
| Garlic | — | — | — | Aug 27 – Oct 1 |
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 Republic, WA weather station, 4 km away (elevation 2,556 ft (779 m)).
Frost dates near Republic
- Malo May 30 · Sep 10
- Wauconda May 6 · Oct 6
- Curlew May 30 · Sep 10
- Danville May 30 · Sep 10
- Orient May 8 · Oct 1
- Boyds May 8 · Oct 1
- Marcus May 2 · Oct 2
- Kettle Falls May 2 · Oct 2
- Laurier May 8 · Oct 1
- Inchelium May 2 · Oct 2
Frequently asked questions
When is the last frost in Republic, WA?
The median last spring frost in Republic, WA is May 30. There is still about a 10% chance of frost after June 17, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Republic, WA?
The median first fall frost is September 10, with about a 10% chance of frost before August 28.
How long is the growing season in Republic, WA?
About 103 days between the median last spring frost and first fall frost.
What planting zone is Republic, WA?
Republic, WA is in USDA hardiness zone 6a.