Howell, MI 48844 Frost Dates
Howell, MI: when does the frost end?
The last spring frost here typically falls around 05/04, about 249 days from today. Fall's first freeze usually shows up around 10/07, roughly 156 days after the last spring frost.
Howell sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 6 weeks until Howell's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Howell's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Howell against the rest of the dataset
About 156 days separate Howell's last and first frost, putting it 33,550 of 40,283 ZIP codes nationally. Within MI, it ranks 740 of 1,153.
Learn more
Before leaning on 48844's figures: local microclimates explains what one yard in Howell can differ from the 48844 normal, while zone vs. frost date explains why Zone 6a and Howell's frost date answer different questions.