Frost Dates for 64831 — Anderson, Missouri

Half of springs at Anderson, MO see their last 32°F night by April 15; only one in ten is past it by March 26, and one in ten still has one after May 1. Planting tender crops after April 22 leaves a 30% risk of a frost on them, after April 26 20%, and after May 1 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 23 in half of years, as early as October 10 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 1; in spring the one-in-ten date for 28°F is April 23, 8 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 216 days one year in ten and falls short of 168 one year in ten. On average 100 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 25, and return around October 13. Severe cold of 16°F or below comes every winter, usually between December 5 and February 26.

July is the warmest month at Anderson, MO, averaging 88°F by day and 67°F at night; January is the coldest at 46°F and 25°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 75% of years and May still brings one in 12% of years.

Warmth for growing adds up to 4,208 growing degree days a year (base 50°F), more than at 69% of the 158 Missouri stations. 37% of them (1,578) have built up by the end of June, and July adds the most, 856. Precipitation totals 44.3 inches a year, most in May (6.0") and least in January (1.9"); May to September bring 51% of it.

The nearest other station, Anderson 3W, MO, 2 miles southwest of Anderson, has the same 50% last-frost date, a first frost 3 days later (October 26), a season 3 days longer.

The first measurable snow (0.1 inch or more) in Anderson usually arrives around December 9, and the last of the season around February 26. Those are the middle dates across the winters of 1991–2020 at Anderson, MO, 0.8 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 48 days after the last snow.

ZIP 64831 is under a mile from Anderson, MO, which stands at 1,050 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 64831 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.