Frost Dates for 37042 — Clarksville, Tennessee

Half of springs at Clarksville Outlaw Airport, TN see their last 32°F night by April 6; only one in ten is past it by March 20, and one in ten still has one after April 23. Planting tender crops after April 13 leaves a 30% risk of a frost on them, after April 18 20%, and after April 23 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 34% of the 144 Tennessee stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 28 in half of years, as early as October 15 one year in ten, and holds off past November 9 one year in ten. A hard freeze of 28°F follows 10 days later, around November 7; in spring the one-in-ten date for 28°F is April 11, 12 days before the 32°F one. The freeze-free season lasts 204 days in a typical year, shorter than at 47% of the 144 Tennessee stations; it reaches 226 days one year in ten and falls short of 183 one year in ten. On average 80 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 18, and return around October 19. Severe cold of 16°F or below comes in 99% of winters, usually between December 16 and February 15.

July is the warmest month at Clarksville Outlaw Airport, TN, averaging 89°F by day and 68°F at night; January is the coldest at 46°F and 28°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 66% of years.

Warmth for growing adds up to 4,504 growing degree days a year (base 50°F), more than at 54% of the 144 Tennessee stations. 39% of them (1,737) have built up by the end of June, and July adds the most, 874. Precipitation totals 47.3 inches a year, most in May (4.9") and least in August (2.9"); May to September bring 40% of it.

The nearest other station, Clarksville Wwtp, TN, 5 miles southeast of Clarksville and 158 feet lower, has a last frost 3 days earlier (April 3), a first frost 4 days later (November 1), a season 8 days longer.

Measurable snow is rare here: only 8 of 22 winters from 1991 to 2020 recorded 0.1 inch or more at Clarksville Wwtp, TN, 4.5 miles away, so there is no typical first-snow date to plan around.

ZIP 37042 is 3 miles from Clarksville Outlaw Airport, TN, which stands at 560 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 37042 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.