Hill City 1 W, ID Frost Dates & Growing Season

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

Last spring frost
Jun 16
~50% chance of frost after
First fall frost
Sep 6
~50% chance of frost before
Growing season
82 days
frost-free stretch
USDA zone
≈ 5b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost May 31 Jun 16 Jul 3
First fall frost Sep 22 Sep 6 Aug 20
Hard freeze (28°F), median last May 30 · first Sep 18

Computed from NOAA 1991–2020 climate normals at the HILL CITY 1 W 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 Hill City 1 W

Computed from Hill City 1 W's own frost dates. Click any crop for the full zone-5 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Apr 21 – May 5 Jun 23 – Jun 30
🫑 Peppers Apr 7 – Apr 21 Jun 30 – Jul 7
🥬 Lettuce May 5 – May 19 May 19 – Jun 2 May 19 – Jun 16
🫛 Peas May 5 – May 19
🥕 Carrots May 26 – Jun 16
🥦 Broccoli Apr 28 – May 12 May 26 – Jun 9
🥬 Kale May 5 – May 19 May 19 – Jun 2 May 19 – Jun 2
🥒 Cucumbers May 19 – May 26 Jun 23 – Jun 30 Jun 23 – Jun 30
🥒 Zucchini May 19 – May 26 Jun 23 – Jun 30 Jun 23 – Jun 30
🫘 Green Beans (Bush) Jun 23 – Jun 30
🌽 Sweet Corn Jun 23 – Jun 30
🌿 Basil May 5 – May 19 Jun 23 – Jun 30 Jun 30 – Jul 7
🧄 Garlic Fall: Jul 26 – Aug 23

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 Hill City 1 W's dates automatically after a lookup.

Reading the season in Hill City 1 W

At about 82 frost-free days, Hill City 1 W rewards efficiency: start warm-season crops indoors, favor short-season varieties, and lean on cold-tolerant crops — peas, kale, roots — that shrug off the shoulder-season frosts on either end.

Frequently asked questions

When is the last frost in Hill City 1 W, ID?

The average last spring frost in Hill City 1 W is around Jun 16, 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 Hill City 1 W, ID?

The average first fall frost in Hill City 1 W arrives around Sep 6. 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 Hill City 1 W?

About 82 frost-free days on average, from Jun 16 to Sep 6. That favors short-season varieties and transplants for warm-season crops, with cool-season vegetables doing the heavy lifting in spring and fall.

What USDA zone is Hill City 1 W in?

USDA zone 5b 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.