Frost Dates for 38574 — Monterey, Tennessee

Half of springs at Monterey, TN see their last 32°F night by April 10; only one in ten is past it by March 23, and one in ten still has one after April 28. Planting tender crops after April 18 leaves a 30% risk of a frost on them, after April 22 20%, and after April 28 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 67% of the 144 Tennessee stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 30 in half of years, as early as October 16 one year in ten, and holds off past November 13 one year in ten. A hard freeze of 28°F follows 10 days later, around November 9; in spring the one-in-ten date for 28°F is April 17, 11 days before the 32°F one. The freeze-free season lasts 203 days in a typical year, shorter than at 52% of the 144 Tennessee stations; it reaches 227 days one year in ten and falls short of 180 one year in ten. On average 83 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 13 days longer, to about April 23, and return around October 21. Severe cold of 16°F or below comes every winter, usually between December 20 and February 22.

July is the warmest month at Monterey, TN, averaging 84°F by day and 67°F at night; January is the coldest at 43°F and 27°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 73% of years.

Warmth for growing adds up to 4,010 growing degree days a year (base 50°F), fewer than at 81% of the 144 Tennessee stations. 38% of them (1,520) have built up by the end of June, and July adds the most, 787. Precipitation totals 64.3 inches a year, most in December (6.7") and least in October (3.8"); May to September bring 40% of it.

The nearest other station, Crossville Ed & Research, TN, 10 miles southeast of Monterey, has a last frost 9 days later (April 19), a first frost 8 days earlier (October 22), a season 18 days shorter.

The first measurable snow (0.1 inch or more) in Monterey usually arrives around December 23, and the last of the season around March 16. Those are the middle dates across the winters of 1991–2020 at Monterey, TN, 1.8 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 25 days after the last snow.

ZIP 38574 is 2 miles from Monterey, TN, which stands at 1,860 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 38574 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.