Hammond, IN 46320 Frost Dates
Frost dates for Hammond, IN, ZIP 46320
Around 04/23 is the usual last spring frost, about 238 days away. The first fall frost typically arrives around 10/20, about 179 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Hammond, not a forecast for this year.
What to do before the first frost
Zone 6a around Hammond has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/23 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hammond compares
Hammond's growing season runs about 179 days, ranking 25,141 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 518 of 927.
Learn more
local microclimates explains what one yard in Hammond can differ from the 46320 normal, and zone vs. frost date explains why Zone 6a and Hammond's frost date answer different questions.