Chambersburg 1 ESE, PA Frost Dates & Growing Season

The two dates every Chambersburg 1 ESE garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Apr 18
~50% chance of frost after
First fall frost
Oct 25
~50% chance of frost before
Growing season
190 days
frost-free stretch
USDA zone
≈ 7a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Apr 3 Apr 18 May 5
First fall frost Nov 8 Oct 25 Oct 10
Hard freeze (28°F), median last Apr 4 · first Nov 6

Computed from NOAA 1991–2020 climate normals at the CHAMBERSBURG 1 ESE station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Chambersburg 1 ESE

Computed from Chambersburg 1 ESE's own frost dates. Click any crop for the full zone-7 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Feb 21 – Mar 7 Apr 25 – May 2
🫑 Peppers Feb 7 – Feb 21 May 2 – May 9
🥬 Lettuce Mar 7 – Mar 21 Mar 21 – Apr 4 Mar 21 – Apr 18
🫛 Peas Mar 7 – Mar 21
🥕 Carrots Mar 28 – Apr 18
🥦 Broccoli Feb 28 – Mar 14 Mar 28 – Apr 11
🥬 Kale Mar 7 – Mar 21 Mar 21 – Apr 4 Mar 21 – Apr 4
🥒 Cucumbers Mar 21 – Mar 28 Apr 25 – May 2 Apr 25 – May 2
🥒 Zucchini Mar 21 – Mar 28 Apr 25 – May 2 Apr 25 – May 2
🫘 Green Beans (Bush) Apr 25 – May 2
🌽 Sweet Corn Apr 25 – May 2
🌿 Basil Mar 7 – Mar 21 Apr 25 – May 2 May 2 – May 9
🧄 Garlic Fall: Sep 13 – Oct 11

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Chambersburg 1 ESE's dates automatically after a lookup.

Reading the season in Chambersburg 1 ESE

Roughly 190 frost-free days gives Chambersburg 1 ESE gardeners room for nearly every common vegetable. Warm-season crops go out after Apr 18; a fall garden sown in late summer matures comfortably before the Oct 25 frost.

Frequently asked questions

When is the last frost in Chambersburg 1 ESE, PA?

The average last spring frost in Chambersburg 1 ESE is around Apr 18, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Chambersburg 1 ESE, PA?

The average first fall frost in Chambersburg 1 ESE arrives around Oct 25. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Chambersburg 1 ESE?

About 190 frost-free days on average, from Apr 18 to Oct 25. That fits nearly all common vegetables, though the longest-season melons and sweet potatoes benefit from transplants.

What USDA zone is Chambersburg 1 ESE in?

USDA zone 7a on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.