Lake Havasu City, AZ Frost Dates & Growing Season

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

Last spring frost
Jan 5
~50% chance of frost after
First fall frost
Dec 29
~50% chance of frost before
Growing season
358 days
frost-free stretch
USDA zone
≈ 9b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Dec 17 Jan 5 Feb 3
First fall frost Jan 24 Dec 29 Dec 9

Computed from NOAA 1991–2020 climate normals at the LAKE HAVASU CITY 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 Lake Havasu City

Computed from Lake Havasu City's own frost dates. Click any crop for the full zone-9 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Nov 10 – Nov 24 Jan 12 – Jan 19
🫑 Peppers Oct 27 – Nov 10 Jan 19 – Jan 26
🥬 Lettuce Nov 24 – Dec 8 Dec 8 – Dec 22 Dec 8 – Jan 5
🫛 Peas Nov 24 – Dec 8
🥕 Carrots Dec 15 – Jan 5
🥦 Broccoli Nov 17 – Dec 1 Dec 15 – Dec 29
🥬 Kale Nov 24 – Dec 8 Dec 8 – Dec 22 Dec 8 – Dec 22
🥒 Cucumbers Dec 8 – Dec 15 Jan 12 – Jan 19 Jan 12 – Jan 19
🥒 Zucchini Dec 8 – Dec 15 Jan 12 – Jan 19 Jan 12 – Jan 19
🫘 Green Beans (Bush) Jan 12 – Jan 19
🌽 Sweet Corn Jan 12 – Jan 19
🌿 Basil Nov 24 – Dec 8 Jan 12 – Jan 19 Jan 19 – Jan 26
🧄 Garlic Fall: Nov 17 – Dec 15

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 Lake Havasu City's dates automatically after a lookup.

Reading the season in Lake Havasu City

With roughly 358 frost-free days, Lake Havasu City gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Dec 29 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Lake Havasu City, AZ?

The average last spring frost in Lake Havasu City is around Jan 5, 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 Lake Havasu City, AZ?

The average first fall frost in Lake Havasu City arrives around Dec 29. 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 Lake Havasu City?

About 358 frost-free days on average, from Jan 5 to Dec 29. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Lake Havasu City in?

USDA zone 9b 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.