Frost Dates for 63362 — Moscow Mills, Missouri

Half of springs at Elsberry 1 S, MO see their last 32°F night by April 20; only one in ten is past it by April 6, and one in ten still has one after May 5. Planting tender crops after April 27 leaves a 30% risk of a frost on them, after April 30 20%, and after May 5 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 54% of the 158 Missouri stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 20 in half of years, as early as October 6 one year in ten, and holds off past October 31 one year in ten. A hard freeze of 28°F follows 9 days later, around October 29; in spring the one-in-ten date for 28°F is April 24, 11 days before the 32°F one. The freeze-free season lasts 181 days in a typical year, shorter than at 87% of the 158 Missouri stations; it reaches 201 days one year in ten and falls short of 161 one year in ten. On average 107 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 10 days longer, to about April 30, and return around October 10. Severe cold of 16°F or below comes every winter, usually between December 1 and March 7.

July is the warmest month at Elsberry 1 S, MO, averaging 87°F by day and 66°F at night; January is the coldest at 38°F and 20°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 18% of years.

Warmth for growing adds up to 3,788 growing degree days a year (base 50°F), fewer than at 78% of the 158 Missouri stations. 37% of them (1,406) have built up by the end of June, and July adds the most, 818. Precipitation totals 41.4 inches a year, most in May (5.0") and least in February (2.2"); May to September bring 49% of it.

The nearest other station, Warrenton 1 N, MO, 16 miles southwest of Moscow Mills and 352 feet higher, has a last frost 6 days earlier (April 14), a first frost 3 days later (October 23), a season 10 days longer.

The first measurable snow (0.1 inch or more) in Moscow Mills usually arrives around December 9, and the last of the season around March 8. Those are the middle dates across the winters of 1991–2020 at Elsberry 1 S, MO, 15.2 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 43 days after the last snow.

ZIP 63362 is 15 miles from Elsberry 1 S, MO, which stands at 475 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 5 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 63362 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.