When to plant in Washington Court House, OH
USDA Zone 6bWashington Court House, Ohio frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 6b means Washington Court House sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average last spring frost in Washington Court House is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
WASHINGTON COURT HOUSE · 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 Washington Court House’s own odds, recorded at WASHINGTON COURT HOUSE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 19 | May 2 | Apr 19 | Sep 27 | Oct 10 | Oct 22 |
| 32°F | May 8 | Apr 23 | Apr 10 | Oct 8 | Oct 21 | Oct 31 |
| 28°F | Apr 25 | Apr 11 | Mar 29 | Oct 20 | Nov 1 | Nov 14 |
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 Washington Court House, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 36 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.
Washington Court House planting FAQ
When is the last spring frost in Washington Court House, OH?
On average, the last spring frost in Washington Court House is around April 23 (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 Washington Court House, OH?
Expect Washington Court House's first fall frost near October 21 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Washington Court House in?
Washington Court House is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Washington Court House?
There are roughly 181 frost-free days in Washington Court House (a moderate growing season), running from the average last frost around April 23 to the first fall frost near October 21.
When should I plant tomatoes in Washington Court House?
In Washington Court House, start tomato seeds indoors around February 26–March 12, then transplant seedlings outdoors around April 30 once the danger of frost has passed.
Never miss a window in Washington Court House
An email when it’s time to start seeds, transplant, and sow — timed to Washington Court House’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Wilmington · 35 km
- London · 39 km
- Circleville · 43 km
- Chillicothe · 43 km
- Xenia · 47 km
- Grove City · 48 km
- Springfield · 54 km
- Fairborn · 58 km
Frost dates recorded at WASHINGTON COURT HOUSE, 0 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 Washington Court House, OH — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00338794. Retrieved from https://blissgarden.com/ohio/washington-court-house.