USDA hardiness zone lookup
Evanston (82930) — USDA Zone 4b
Evanston, Wyoming · 87-day growing season
Frost dates and growing season for 82930
| USDA hardiness zone | Zone 4b |
|---|---|
| Average last spring frost | June 10 |
| Average first fall frost | September 5 |
| Growing season length | ~87 days |
| Temperature range (F) | -30 to -20°F |
| Temperature range (C) | -34 to -29°C |
These are 50%-probability averages modeled from this ZIP's USDA hardiness zone and regional climate normals — not a single-station reading. In a typical year the last spring frost will have passed by June 10, but in a colder-than-average year it can run 1-2 weeks later. Plant tender crops (tomatoes, peppers, basil) once both soil and night temperatures are consistently warm — a thermometer beats the calendar.
Growing season in Evanston
Evanston, Wyoming sits in USDA Zone 4b, with roughly 87 frost-free days between an average last spring frost around June 10 and a first fall frost around September 5. That is a short season — start warm-season crops indoors 6-8 weeks early and lean on quick-maturing, cold-tolerant cultivars to beat the first fall frost.
What grows in Evanston
Evanston falls in USDA Zone 4b, which means the same hardiness constraints apply as the full Zone 4 guide. Vegetables, herbs, and fruit trees rated to Zone 4b (or hardier) will overwinter here in a typical year.
- Apple, pear, plum, sour cherry
- Blueberries (highbush)
- Raspberries
- Strawberries
- Tomatoes
- Peppers (short-season)
- Cucumbers
- Beans
- Squash (summer + winter)
- Garlic
What to plant in Evanston this week
Evanston's last frost is around June 10. This is the spring transplant window — start tomatoes and peppers indoors if you haven't, and direct-sow cold-tolerant crops now.
- When to plant tomatoes in zone 4
- When to plant peppers in zone 4
- When to plant basil in zone 4
- When to plant bush beans in zone 4
- When to plant cucumbers in zone 4
Full planting calendar for Evanston
Crop-by-crop sowing, transplant, and harvest dates calibrated to zone 4 averages:
- When to plant tomatoes in zone 4
- When to plant peppers in zone 4
- When to plant basil in zone 4
- When to plant garlic in zone 4
- When to plant lettuce in zone 4
- When to plant bush beans in zone 4
- When to plant cucumbers in zone 4
- When to plant summer squash in zone 4
- When to plant peas in zone 4
- When to plant carrots in zone 4
Local microclimate notes
Zone tables give you the average — but Evanstongardens vary. South-facing walls and paved areas can run a full half-zone warmer than the published rating. Low-lying spots, frost pockets, and shaded north sides can run colder. If you've gardened here a few seasons, your own frost record (the last time you actually got frost damage) is more accurate than any national average.
Source and methodology
Hardiness zone from the USDA Plant Hardiness Zone Map (2023 revision). Frost-date and growing-season figures are modeled from this ZIP's USDA hardiness zone and regional NOAA 1991-2020 climate normals — they are zone-level estimates, not a per-station record, so treat them as planning guidance and confirm against your own local frost history. Crop recommendations are drawn from US Cooperative Extension references and curated by the Growli editorial team. Last reviewed May 2026.
Nearby ZIP codes in Wyoming
- 82001 — Cheyenne (Zone 5b)
- 82601 — Casper (Zone 5a)
- 83001 — Jackson (Zone 4a)
- 82009 — Cheyenne (North) (Zone 5b)
- 82070 — Laramie (Zone 4b)
- 82414 — Cody (Zone 5a)
- 82501 — Riverton (Zone 4b)
- 82801 — Sheridan (Zone 5a)
- Browse all US ZIP codes by state