USDA Hardiness Zone 7a
Frost Dates for 37080 — Joelton, Tennessee
NOAA 1991–2020 normals from Goodlettsville 7WNW, TN (820 ft), 5 miles east.
Updated
In Joelton, the last spring frost (32°F) is around April 7 in half of years and has passed by April 26 in nine years out of ten. The first fall frost comes around October 28, as early as October 15 one year in ten, leaving a typical freeze-free season of 204 days (NOAA, Goodlettsville 7WNW, TN).
- Last spring frost
- April 7
- First fall frost
- October 28
- Growing season
- 204 days
- Hardiness zone
- 7a
50% probability
50% probability
freeze-free, 50%
0 to 5°F (-17.8 to -15.0°C) coldest night
- First snow
- January 8
- Last snow
- February 20
- Winters with snow
- 95%
- Snow per year
- 5.8"
median, 1991–2020
median, 1991–2020
21 of 22 observed
NOAA normal
Frost risk by date in Joelton
Half of springs at Goodlettsville 7WNW, TN see their last 32°F night by April 7; only one in ten is past it by March 23, and one in ten still has one after April 26. Planting tender crops after April 16 leaves a 30% risk of a frost on them, after April 21 20%, and after April 26 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 84% 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 11 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 15, 11 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 224 days one year in ten and falls short of 181 one year in ten. On average 91 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 20, and return around October 20. Severe cold of 16°F or below comes every winter, usually between December 15 and February 25.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 4 | Apr 9 | Apr 13 | Apr 17 | Apr 20 | Apr 23 | Apr 27 | May 1 | May 5 |
| 32°F | Mar 23 | Mar 29 | Apr 2 | Apr 4 | Apr 7 | Apr 11 | Apr 16 | Apr 21 | Apr 26 |
| 28°F | Mar 11 | Mar 16 | Mar 21 | Mar 26 | Mar 29 | Apr 1 | Apr 4 | Apr 7 | Apr 15 |
| 24°F | Feb 28 | Mar 5 | Mar 10 | Mar 14 | Mar 17 | Mar 21 | Mar 26 | Mar 31 | Apr 4 |
| 20°F | Feb 16 | Feb 24 | Feb 28 | Mar 2 | Mar 6 | Mar 10 | Mar 14 | Mar 19 | Mar 26 |
| 16°F | Feb 3 | Feb 9 | Feb 14 | Feb 20 | Feb 25 | Feb 28 | Mar 3 | Mar 8 | Mar 14 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 8 | Oct 12 | Oct 15 | Oct 18 | Oct 20 | Oct 22 | Oct 24 | Oct 27 | Oct 30 |
| 32°F | Oct 15 | Oct 21 | Oct 23 | Oct 26 | Oct 28 | Oct 31 | Nov 2 | Nov 5 | Nov 11 |
| 28°F | Oct 24 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 11 | Nov 15 | Nov 19 | Nov 24 |
| 24°F | Nov 4 | Nov 9 | Nov 13 | Nov 17 | Nov 21 | Nov 25 | Nov 29 | Dec 2 | Dec 8 |
| 20°F | Nov 13 | Nov 19 | Nov 25 | Nov 29 | Dec 1 | Dec 5 | Dec 10 | Dec 17 | Dec 24 |
| 16°F | Nov 24 | Dec 1 | Dec 5 | Dec 10 | Dec 15 | Dec 22 | Dec 27 | Jan 1 | Jan 9 |
Freeze probabilities 1991–2020 at Goodlettsville 7WNW, TN, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 37080 →Compare Joelton with another place →
Compared with the next station
The nearest other station, Springfield Exp Stn, TN, 10 miles north of Joelton, has a last frost 2 days later (April 9), the same first-frost date, a season 3 days shorter.
When it snows in Joelton, Tennessee
The first measurable snow (0.1 inch or more) in Joelton usually arrives around January 8, and the last of the season around February 20. Those are the middle dates across the winters of 1991–2020 at Springfield Exp Stn, TN, 10.5 miles away: half of years saw snow earlier, half later. Snow fell in 95% of those winters. The last 32°F night of spring typically comes 46 days after the last snow.
Planting calendar for 37080
| When | What to do |
|---|---|
| January 27 – February 10 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 10 – February 24 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 10 – March 24 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 7 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 5 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 14 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 28 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 37080 is 5 miles from Goodlettsville 7WNW, TN, which stands at 820 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 37080 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.
Frost dates across Tennessee →
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.