Madison, WI Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Madison, Wisconsin.
Gardening in Madison
Wisconsin's capital is a college town surrounded by some of the richest farmland in the Midwest. The Dane County Farmers Market — the largest producers-only market in the country — is the Saturday morning institution that connects Madison's food obsession with its agricultural surroundings.
Madison's isthmus location between lakes Mendota and Monona moderates temperatures slightly compared to the open prairie. Your 157-day growing season is classic Wisconsin — short but intense. The long summer days drive rapid growth. The deep prairie-derived soils are naturally fertile.
Badger fans know that consistent effort in unglamorous conditions produces excellence. The Dane County Farmers Market circles the Capitol Square every Saturday, and the competition for the best tomatoes is taken with typical Wisconsin seriousness — which is to say, very.
What This Means for Madison Gardeners
The average last spring frost in Madison is around May 1, and the average first fall frost arrives around October 5. That gives you approximately 157 frost-free days to work with.
At 157 days, you're working with a compressed but productive window. Choose varieties by their days-to-maturity number — anything under 75 days is safe, 75-90 requires indoor starting, and 90+ is a calculated risk. The tradeoff: your cool, moderate summers are excellent for crops that heat-zone gardeners struggle with. Your lettuce doesn't bolt in June. Your peas produce for weeks longer. Cool-season crops are your superpower.
These dates are based on NOAA 30-year Climate Normal data for the Madison area. Your actual frost dates could shift 2-3 weeks in either direction in any given year. Learn more about our data sources.
What to Grow in Madison
Madison's 157-day season gives you plenty of time for most vegetables with good planning. Start warm-season crops indoors to maximize your window. Cool-season crops thrive in your spring and fall shoulder seasons. Recommended starting points: tomatoes, peppers, lettuce, carrots, beans, broccoli, garlic, and basil.
See the full Wisconsin planting guide for all 40 plants: Wisconsin Planting Calendar. Or enter your zip code for exact planting dates personalized to Madison.
More About Zone 5A
Madison is in USDA Hardiness Zone 5A, which means average annual extreme minimum temperatures between -20°F to -15°F. View the full Zone 5A planting guide.
See the complete planting calendar for Wisconsin: Wisconsin Planting Calendar.
Other Cities in Wisconsin
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Madison area. They represent historical averages, not predictions. In any given year, the actual last frost could be 2-3 weeks earlier or later. Microclimates within Madison (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start warm-season seeds indoors 6-8 weeks before your last frost (May 1) to maximize your 157-day window. Direct sow cold-hardy crops like peas and lettuce 3-4 weeks before last frost. Every week of early indoor starting matters at this season length. Enter your zip code for exact dates.