Frost Dates for 49868 — Newberry, Michigan

Half of springs at Newberry Correctional Facility, MI see their last 32°F night by May 21; only one in ten is past it by May 4, and one in ten still has one after June 4. Planting tender crops after May 27 leaves a 30% risk of a frost on them, after May 31 20%, and after June 4 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 80% of the 172 Michigan stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 5 in half of years, as early as September 20 one year in ten, and holds off past October 21 one year in ten. A hard freeze of 28°F follows 13 days later, around October 18; in spring the one-in-ten date for 28°F is May 23, 12 days before the 32°F one. The freeze-free season lasts 135 days in a typical year, shorter than at 78% of the 172 Michigan stations; it reaches 159 days one year in ten and falls short of 115 one year in ten. On average 178 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 12 days longer, to about June 2, and return around September 24. Severe cold of 16°F or below comes every winter, usually between November 22 and April 4.

July is the warmest month at Newberry Correctional Facility, MI, averaging 77°F by day and 55°F at night; January is the coldest at 23°F and 10°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). From July to August the chance of a 32°F night stays under 10% each month. In spring, June still brings one in 16% of years.

Warmth for growing adds up to 1,739 growing degree days a year (base 50°F), fewer than at 91% of the 172 Michigan stations. 28% of them (479) have built up by the end of June, and July adds the most, 488.

The first measurable snow (0.1 inch or more) in Newberry usually arrives around November 8, and the last of the season around April 11. Those are the middle dates across the winters of 1991–2020 at Newberry Correctional Facility, MI, 7.6 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 40 days after the last snow.

ZIP 49868 is 8 miles from Newberry Correctional Facility, MI, which stands at 886 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 49868 in zone 5a, the band where the coldest night of the year averaged -20 to -15°F (-28.9 to -26.1°C) over 1991–2020; a zone describes winter lows, not frost dates.