Moose 1 NNE, WY Frost Dates & Growing Season

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

Last spring frost
Jun 24
~50% chance of frost after
First fall frost
Aug 28
~50% chance of frost before
Growing season
65 days
frost-free stretch
USDA zone
≈ 4b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Jun 8 Jun 24 Jul 11
First fall frost Sep 12 Aug 28 Aug 8
Hard freeze (28°F), median last Jun 7 · first Sep 12

Computed from NOAA 1991–2020 climate normals at the MOOSE 1 NNE 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 Moose 1 NNE

Computed from Moose 1 NNE'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 29 – May 13 Jul 1 – Jul 8
🫑 Peppers Apr 15 – Apr 29 Jul 8 – Jul 15
🥬 Lettuce May 13 – May 27 May 27 – Jun 10 May 27 – Jun 24
🫛 Peas May 13 – May 27
🥕 Carrots Jun 3 – Jun 24
🥦 Broccoli May 6 – May 20 Jun 3 – Jun 17
🥬 Kale May 13 – May 27 May 27 – Jun 10 May 27 – Jun 10
🥒 Cucumbers May 27 – Jun 3 Jul 1 – Jul 8 Jul 1 – Jul 8
🥒 Zucchini May 27 – Jun 3 Jul 1 – Jul 8 Jul 1 – Jul 8
🫘 Green Beans (Bush) Jul 1 – Jul 8
🌽 Sweet Corn Jul 1 – Jul 8
🌿 Basil May 13 – May 27 Jul 1 – Jul 8 Jul 8 – Jul 15
🧄 Garlic Fall: Jul 17 – Aug 14

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 Moose 1 NNE's dates automatically after a lookup.

Reading the season in Moose 1 NNE

At about 65 frost-free days, Moose 1 NNE 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 Moose 1 NNE, WY?

The average last spring frost in Moose 1 NNE is around Jun 24, 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 Moose 1 NNE, WY?

The average first fall frost in Moose 1 NNE arrives around Aug 28. 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 Moose 1 NNE?

About 65 frost-free days on average, from Jun 24 to Aug 28. 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 Moose 1 NNE 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.