Evanston 1 E, WY Frost Dates & Growing Season

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

Last spring frost
Jun 12
~50% chance of frost after
First fall frost
Sep 12
~50% chance of frost before
Growing season
92 days
frost-free stretch
USDA zone
≈ 4b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost May 26 Jun 12 Jul 2
First fall frost Sep 25 Sep 12 Aug 26
Hard freeze (28°F), median last May 24 · first Sep 24

Computed from NOAA 1991–2020 climate normals at the EVANSTON 1 E 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 Evanston 1 E

Computed from Evanston 1 E's own frost dates. Click any crop for the full zone-4 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Apr 17 – May 1 Jun 19 – Jun 26
🫑 Peppers Apr 3 – Apr 17 Jun 26 – Jul 3
🥬 Lettuce May 1 – May 15 May 15 – May 29 May 15 – Jun 12
🫛 Peas May 1 – May 15
🥕 Carrots May 22 – Jun 12
🥦 Broccoli Apr 24 – May 8 May 22 – Jun 5
🥬 Kale May 1 – May 15 May 15 – May 29 May 15 – May 29
🥒 Cucumbers May 15 – May 22 Jun 19 – Jun 26 Jun 19 – Jun 26
🥒 Zucchini May 15 – May 22 Jun 19 – Jun 26 Jun 19 – Jun 26
🫘 Green Beans (Bush) Jun 19 – Jun 26
🌽 Sweet Corn Jun 19 – Jun 26
🌿 Basil May 1 – May 15 Jun 19 – Jun 26 Jun 26 – Jul 3
🧄 Garlic Fall: Aug 1 – Aug 29

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 Evanston 1 E's dates automatically after a lookup.

Reading the season in Evanston 1 E

At about 92 frost-free days, Evanston 1 E 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 Evanston 1 E, WY?

The average last spring frost in Evanston 1 E is around Jun 12, 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 Evanston 1 E, WY?

The average first fall frost in Evanston 1 E arrives around Sep 12. 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 Evanston 1 E?

About 92 frost-free days on average, from Jun 12 to Sep 12. 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 Evanston 1 E in?

USDA zone 4b 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.