Frost Dates for 49858 — Menominee, Michigan

Half of springs at Marinette, WI see their last 32°F night by May 4; only one in ten is past it by April 19, and one in ten still has one after May 20. Planting tender crops after May 10 leaves a 30% risk of a frost on them, after May 15 20%, and after May 20 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 38% of the 172 Michigan stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 11 in half of years, as early as September 29 one year in ten, and holds off past October 29 one year in ten. A hard freeze of 28°F follows 16 days later, around October 27; in spring the one-in-ten date for 28°F is May 10, 10 days before the 32°F one. The freeze-free season lasts 160 days in a typical year, longer than at 51% of the 172 Michigan stations; it reaches 182 days one year in ten and falls short of 140 one year in ten. On average 153 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 May 16, and return around October 1. Severe cold of 16°F or below comes every winter, usually between November 25 and March 25.

July is the warmest month at Marinette, WI, averaging 80°F by day and 60°F at night; January is the coldest at 26°F and 10°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 62% of years.

Warmth for growing adds up to 2,255 growing degree days a year (base 50°F), fewer than at 61% of the 172 Michigan stations. 29% of them (648) have built up by the end of June, and July adds the most, 617. Precipitation totals 33.2 inches a year, most in June (3.9") and least in February (1.2"); May to September bring 54% of it.

The nearest other station, Peshtigo, WI, 10 miles southwest of Menominee, has a last frost 7 days later (May 11), a first frost 6 days earlier (October 5), a season 15 days shorter.

The first measurable snow (0.1 inch or more) in Menominee usually arrives around November 17, and the last of the season around April 9. Those are the middle dates across the winters of 1991–2020 at Marinette, WI, 3.2 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 25 days after the last snow.

ZIP 49858 is 3 miles from Marinette, WI, which stands at 589 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 54143 (Marinette). The 2023 USDA Plant Hardiness Zone Map lists ZIP 49858 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.