Frost Dates for 65632 — Conway, Missouri

Half of springs at Marshfield 4 WSW, MO see their last 32°F night by April 13; only one in ten is past it by March 29, and one in ten still has one after April 29. Planting tender crops after April 20 leaves a 30% risk of a frost on them, after April 24 20%, and after April 29 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 35% of the 158 Missouri stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 24 in half of years, as early as October 8 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 9 days later, around November 2; in spring the one-in-ten date for 28°F is April 19, 10 days before the 32°F one. The freeze-free season lasts 191 days in a typical year, shorter than at 60% of the 158 Missouri stations; it reaches 214 days one year in ten and falls short of 169 one year in ten. On average 95 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 April 25, and return around October 14. Severe cold of 16°F or below comes every winter, usually between December 1 and March 3.

July is the warmest month at Marshfield 4 WSW, MO, averaging 88°F by day and 67°F at night; January is the coldest at 42°F and 22°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 81% of years.

Warmth for growing adds up to 4,055 growing degree days a year (base 50°F), more than at 51% of the 158 Missouri stations. 36% of them (1,477) have built up by the end of June, and July adds the most, 851. Precipitation totals 45.7 inches a year, most in May (5.5") and least in February (2.5"); May to September bring 49% of it.

The nearest other station, Grovespring 1NE, MO, 14 miles southeast of Conway, has a last frost 2 days later (April 15), a first frost 2 days earlier (October 22), a season 3 days shorter.

The first measurable snow (0.1 inch or more) in Conway usually arrives around December 11, and the last of the season around March 9. Those are the middle dates across the winters of 1991–2020 at Grovespring 1NE, MO, 14.5 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 35 days after the last snow.

ZIP 65632 is 14 miles from Marshfield 4 WSW, MO, which stands at 1,414 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 65706 (Marshfield). The 2023 USDA Plant Hardiness Zone Map lists ZIP 65632 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.