Frost Dates for 65713 — Niangua, Missouri

Half of springs at Grovespring 1NE, MO see their last 32°F night by April 15; only one in ten is past it by March 29, and one in ten still has one after May 2. Planting tender crops after April 22 leaves a 30% risk of a frost on them, after April 26 20%, and after May 2 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 22 in half of years, as early as October 6 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 10 days later, around November 1; in spring the one-in-ten date for 28°F is April 20, 12 days before the 32°F one. The freeze-free season lasts 188 days in a typical year, shorter than at 70% of the 158 Missouri stations; it reaches 211 days one year in ten and falls short of 167 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 12 days longer, to about April 27, and return around October 11. Severe cold of 16°F or below comes every winter, usually between December 5 and March 2.

July is the warmest month at Grovespring 1NE, MO, averaging 88°F by day and 66°F at night; January is the coldest at 43°F and 21°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 84% of years and May still brings one in 12% of years.

Warmth for growing adds up to 3,948 growing degree days a year (base 50°F), fewer than at 59% of the 158 Missouri stations. 36% of them (1,421) have built up by the end of June, and July adds the most, 840. Precipitation totals 44.4 inches a year, most in May (5.4") and least in February (2.3"); May to September bring 47% of it.

The nearest other station, Marshfield 4 WSW, MO, 14 miles southwest of Niangua, has a last frost 2 days earlier (April 13), a first frost 2 days later (October 24), a season 3 days longer.

The first measurable snow (0.1 inch or more) in Niangua 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, 9.3 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 37 days after the last snow.

ZIP 65713 is 9 miles from Grovespring 1NE, MO, which stands at 1,388 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 65667 (Hartville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 65713 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.