Valley, WA frost dates
Last spring frostMay 16median date
First fall frostSep 15median date
Growing season122 daysfrost-free
Hardiness zone6bZone 6b
How Valley compares
- In 8 years out of 10, the last spring frost in Valley falls between April 30 and June 7, a 38-day window. The first fall frost falls between September 1 and September 29.
- The median last frost is 25 days later than the Washington median of Apr 21.
- Its 122-day growing season is longer than 5% of the 491 Washington places with a regular frost season (state median 182 days).
- The last frost is 24 days later than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 170 nights a year at or below 32°F.
- Compared with Spokane, WA, 59 km away, the last frost here is 20 days later than there and the growing season is 50 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 30 |
| 50% (median) | May 16 |
| 10% (safe for tender plants) | June 7 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 1 |
| 50% (median) | September 15 |
| 90% (late) | September 29 |
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 Valley, WA
Valley, WA frost dates — last frost May 16, first frost Sep 15, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Feb 21 to Mar 7Transplant outside: Apr 18 to May 2
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 21 to Apr 4Transplant outside: May 23 to Jun 6
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Sow outdoors: Apr 18 to May 23Plant for fall: Jul 21 to Aug 18
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 18 to May 2Sow outdoors: Apr 18 to May 2Plant for fall: Jul 7 to Jul 28
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jun 9 to Jun 30
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Plant for fall: Jun 9 to Jun 30
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jun 9 to Jun 30
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20Sow outdoors: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 23 to Jun 6
Sow outdoors: Apr 4 to Apr 25Plant for fall: Jun 23 to Jul 14
Sow outdoors: Apr 4 to Apr 25Plant for fall: Jul 21 to Aug 11
Sow outdoors: Apr 11 to May 23Plant for fall: Aug 4 to Aug 25
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 6Sow outdoors: May 23 to Jun 6Plant for fall: Jun 30 to Jul 14
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6Plant for fall: Jul 7 to Jul 21
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 25 to May 23Plant for fall: Jun 23 to Jul 7
Sow outdoors: Apr 25 to May 23Plant for fall: Jul 7 to Jul 21
Sow outdoors: Apr 25 to May 16
Sow outdoors: May 2 to May 30Plant for fall: Jul 7 to Jul 21
Sow outdoors: May 2 to May 23Plant for fall: Jul 21 to Aug 11
Sow outdoors: May 23 to Jun 13Plant for fall: Jun 30 to Jul 14
Sow outdoors: May 23 to Jun 6
Transplant outside: May 30 to Jun 20
Plant for fall: Sep 1 to Oct 6
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Valley, WA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 21 – Mar 7 | Apr 18 – May 2 | — | — |
| Peppers | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Eggplant | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Tomatoes | Mar 21 – Apr 4 | May 23 – Jun 6 | — | — |
| Lettuce | Mar 21 – Apr 4 | Apr 25 – May 9 | Apr 18 – May 23 | Jul 21 – Aug 18 |
| Kale | Mar 21 – Apr 4 | Apr 18 – May 2 | Apr 18 – May 2 | Jul 7 – Jul 28 |
| Broccoli | Mar 21 – Apr 4 | May 2 – May 16 | — | Jun 9 – Jun 30 |
| Cabbage | Mar 21 – Apr 4 | Apr 25 – May 9 | — | Jun 9 – Jun 30 |
| Cauliflower | Mar 21 – Apr 4 | May 2 – May 16 | — | Jun 9 – Jun 30 |
| Okra | Apr 4 – Apr 18 | Jun 6 – Jun 20 | Jun 6 – Jun 20 | — |
| Basil | Apr 4 – Apr 18 | May 23 – Jun 6 | — | — |
| Peas | — | — | Apr 4 – Apr 25 | Jun 23 – Jul 14 |
| Spinach | — | — | Apr 4 – Apr 25 | Jul 21 – Aug 11 |
| Radishes | — | — | Apr 11 – May 23 | Aug 4 – Aug 25 |
| Cucumbers | Apr 18 – Apr 25 | May 30 – Jun 6 | May 23 – Jun 6 | Jun 30 – Jul 14 |
| Zucchini & Summer Squash | Apr 18 – Apr 25 | — | May 23 – Jun 6 | Jul 7 – Jul 21 |
| Winter Squash & Pumpkins | Apr 18 – Apr 25 | — | May 23 – Jun 6 | — |
| Melons & Watermelon | Apr 18 – Apr 25 | May 30 – Jun 13 | — | — |
| Carrots | — | — | Apr 25 – May 23 | Jun 23 – Jul 7 |
| Beets | — | — | Apr 25 – May 23 | Jul 7 – Jul 21 |
| Potatoes | — | — | Apr 25 – May 16 | — |
| Swiss Chard | — | — | May 2 – May 30 | Jul 7 – Jul 21 |
| Cilantro | — | — | May 2 – May 23 | Jul 21 – Aug 11 |
| Green Beans | — | — | May 23 – Jun 13 | Jun 30 – Jul 14 |
| Sweet Corn | — | — | May 23 – Jun 6 | — |
| Sweet Potatoes | — | May 30 – Jun 20 | — | — |
| Garlic | — | — | — | Sep 1 – Oct 6 |
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 Chewelah, WA weather station, 15 km away (elevation 1,670 ft (509 m)).
Frost dates near Valley
- Loon Lake May 22 · Sep 14
- Springdale May 22 · Sep 14
- Chewelah May 16 · Sep 15
- Clayton May 22 · Sep 14
- Ford May 22 · Sep 14
- Addy May 16 · Sep 15
- Tumtum May 10 · Sep 26
- Hunters May 16 · Sep 15
- Deer Park May 22 · Sep 14
- Gifford May 16 · Sep 15
Frequently asked questions
When is the last frost in Valley, WA?
The median last spring frost in Valley, WA is May 16. There is still about a 10% chance of frost after June 7, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Valley, WA?
The median first fall frost is September 15, with about a 10% chance of frost before September 1.
How long is the growing season in Valley, WA?
About 122 days between the median last spring frost and first fall frost.
What planting zone is Valley, WA?
Valley, WA is in USDA hardiness zone 6b.