Monon, IN 47959 Frost Dates
Frost dates for Monon, IN, ZIP 47959
Typically, the last spring freeze lands around 04/26, roughly 241 days out. The first fall frost typically arrives around 10/17, about 173 frost-free days later.
Zone 5b (-15 to -10°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 Monon, not a forecast for this year.
What to do before the first frost
Zone 5b around Monon has about 7 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.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Monon compares
About 173 days separate Monon's last and first frost, putting it 27,936 of 40,283 ZIP codes nationally. Within IN, it ranks 719 of 927.
Learn more
zone vs. frost date explains why Zone 5b and Monon's frost date answer different questions, and the frost range explains how to read the range around Monon's dates instead of trusting one.