When to plant in Moses Lake, WA
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Moses Lake, Washington — all computed from Moses Lake's nearest NOAA weather station.
In zone 7a, Moses Lake supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
MOSES LAKE GRANT CO AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Moses Lake’s own odds, recorded at MOSES LAKE GRANT CO AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 23 | May 9 | Apr 27 | Sep 17 | Sep 29 | Oct 10 |
| 32°F | May 11 | Apr 27 | Apr 10 | Sep 29 | Oct 8 | Oct 23 |
| 28°F | Apr 30 | Apr 10 | Mar 21 | Oct 5 | Oct 20 | Nov 5 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Moses Lake, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 44 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Moses Lake planting FAQ
When is the last spring frost in Moses Lake, WA?
On average, the last spring frost in Moses Lake is around April 27 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Moses Lake, WA?
Expect Moses Lake's first fall frost near October 8 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Moses Lake in?
Moses Lake is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Moses Lake?
Moses Lake has about 164 frost-free days — a moderate growing season — between the average last spring frost (April 27) and first fall frost (October 8).
When should I plant tomatoes in Moses Lake?
For Moses Lake, sow tomatoes indoors about March 2–March 16 and move the seedlings out around May 4, after the last spring frost.
Never miss a window in Moses Lake
An email when it’s time to start seeds, transplant, and sow — timed to Moses Lake’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- East Wenatchee · 83 km
- Wenatchee · 86 km
- West Richland · 91 km
- Richland · 94 km
- Pasco · 97 km
- Ellensburg · 97 km
- Kennewick · 104 km
- Terrace Heights · 106 km
Frost dates recorded at MOSES LAKE GRANT CO AP, 9 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Moses Lake, WA — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00024110. Retrieved from https://blissgarden.com/washington/moses-lake.