Pontiac, MI 48342 Frost Dates
Pontiac, MI: when does the frost end?
The last spring frost here typically falls around 04/29, about 244 days from today. Fall's first freeze usually shows up around 10/20, roughly 172 days after the last spring frost.
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 Pontiac, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Pontiac's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Pontiac's last frost
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Pontiac against the rest of the dataset
About 172 days separate Pontiac's last and first frost, putting it 28,143 of 40,283 ZIP codes nationally. Within MI, it ranks 248 of 1,153.
Learn more
Before leaning on 48342's figures: the frost range explains how to read the range around Pontiac's dates instead of trusting one, while local microclimates explains what one yard in Pontiac can differ from the 48342 normal.