Frost Dates for 65340 — Marshall, Missouri

Half of springs at Marshall, MO see their last 32°F night by April 10; only one in ten is past it by March 27, and one in ten still has one after April 27. Planting tender crops after April 17 leaves a 30% risk of a frost on them, after April 21 20%, and after April 27 10%. The 17 days between the even-odds date and the one-in-ten date is wider than at 66% 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 12 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 10 days later, around November 3; in spring the one-in-ten date for 28°F is April 16, 11 days before the 32°F one. The freeze-free season lasts 196 days in a typical year, longer than at 54% of the 158 Missouri stations; it reaches 217 days one year in ten and falls short of 175 one year in ten. On average 116 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 11 days longer, to about April 21, and return around October 15. Severe cold of 16°F or below comes every winter, usually between December 2 and March 3.

July is the warmest month at Marshall, MO, averaging 88°F by day and 67°F at night; January is the coldest at 37°F and 19°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 3,892 growing degree days a year (base 50°F), fewer than at 70% of the 158 Missouri stations. 37% of them (1,422) have built up by the end of June, and July adds the most, 851. Precipitation totals 41.8 inches a year, most in May (5.5") and least in January (1.5"); May to September bring 55% of it.

The nearest other station, Sweet Springs, MO, 16 miles southwest of Marshall, has a last frost 7 days later (April 17), a first frost 4 days earlier (October 20), a season 12 days shorter.

The first measurable snow (0.1 inch or more) in Marshall usually arrives around December 17, and the last of the season around February 13. Those are the middle dates across the winters of 1991–2020 at Marshall, MO, 2.7 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 56 days after the last snow.

ZIP 65340 is 3 miles from Marshall, MO, which stands at 790 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 65340 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.