Frost Dates for 37130 — Murfreesboro, Tennessee

Half of springs at Murfreesboro 5 N, TN see their last 32°F night by April 9; only one in ten is past it by March 22, and one in ten still has one after April 26. Planting tender crops after April 15 leaves a 30% risk of a frost on them, after April 20 20%, and after April 26 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 27 in half of years, as early as October 15 one year in ten, and holds off past November 11 one year in ten. A hard freeze of 28°F follows 11 days later, around November 7; in spring the one-in-ten date for 28°F is April 13, 13 days before the 32°F one. The freeze-free season lasts 202 days in a typical year, shorter than at 57% of the 144 Tennessee stations; it reaches 225 days one year in ten and falls short of 180 one year in ten. On average 89 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 22, and return around October 20. Severe cold of 16°F or below comes in 98% of winters, usually between December 22 and February 13.

July is the warmest month at Murfreesboro 5 N, TN, averaging 89°F by day and 68°F at night; January is the coldest at 48°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 70% of years.

Warmth for growing adds up to 4,607 growing degree days a year (base 50°F), more than at 66% of the 144 Tennessee stations. 38% of them (1,742) have built up by the end of June, and July adds the most, 893. Precipitation totals 56.0 inches a year, most in June (5.7") and least in October (3.5"); May to September bring 41% of it.

The nearest other station, Smyrna 6S, TN, 11 miles west of Murfreesboro, has a last frost 4 days later (April 13), a first frost 6 days earlier (October 21), a season 13 days shorter.

The first measurable snow (0.1 inch or more) in Murfreesboro usually arrives around January 23, and the last of the season around February 13. Those are the middle dates across the winters of 1991–2020 at Murfreesboro 5 N, TN, 4.2 miles away: half of years saw snow earlier, half later. Snow fell in 83% of those winters. The last 32°F night of spring typically comes 55 days after the last snow.

ZIP 37130 is 4 miles from Murfreesboro 5 N, TN, which stands at 535 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 37129 (Murfreesboro). The 2023 USDA Plant Hardiness Zone Map lists ZIP 37130 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.