Frost Dates for Leavenworth, WA 98826
Last spring frost May 29 · First fall frost September 15 · 109 frost-free days · USDA Zone 7a
Frost probability for 98826
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | June 18 | May 29 | May 10 |
| Fall (first frost) | September 1 | September 15 | September 29 |
Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (15.0 km away); the 50% date is the median year.
Month by month in Leavenworth
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start the slowest-growing crops indoors: onions, leeks, and celery (10–12 weeks before last frost). |
| March | Start peppers and eggplant indoors 8–10 weeks before your last frost (around May 29). Start tomatoes about two weeks later, 6–8 weeks before last frost. |
| April | Start herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable. |
| May | Last frost around May 29. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings. |
| June | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| July | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| August | First fall frost approaching (around September 15). Transplant fall brassicas. Sow spinach, arugula, and radishes. |
| September | First frost around September 15. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season. |
| October | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
| November | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
What grows in a 109-day season
Frequently Asked Questions
What is the last frost date for Leavenworth, WA (ZIP 98826)?
The median last spring frost date for Leavenworth, WA (ZIP code 98826) is around May 29. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.
What is the first fall frost date in Leavenworth, WA?
The median first fall frost date for Leavenworth, WA is around September 15. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.
How long is the growing season in Leavenworth, WA?
The frost-free growing season in Leavenworth is about 109 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.
What USDA hardiness zone is Leavenworth, WA?
Based on frost date patterns, Leavenworth falls approximately in 7a. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.
When should I start tomatoes indoors in Leavenworth, WA?
Start tomato seeds indoors 6–8 weeks before your last frost date (around May 29). For Leavenworth, that's roughly April 3 to April 17. Transplant outdoors 1–2 weeks after your last frost.
Nearby and related
- Frost dates for Cashmere, WA 98815 (24.8 mi)
- Frost dates for Chelan, WA 98816 (28.7 mi)
- Frost dates for Wenatchee, WA 98801 (34.1 mi)
- Frost dates for East Wenatchee, WA 98802 (37.9 mi)
- Frost dates for North Bend, WA 98045 (42.7 mi)
- When to plant in WA
- When to plant Beans in WA
- When to plant Strawberries in WA
- When to plant Beets in WA
- When to plant Broccoli in WA
- When to plant Carrots in WA
- When to plant Kale in WA
- Look up another ZIP