Last spring frost
Mar 29
Frost Dates for Collierville, TN
First fall frost
Nov 3
Growing season
220 days
Hardiness zone
8a
In an average year around Collierville, TN, the last spring frost (32°F) is about Mar 29 and the first fall frost is about Nov 3, giving roughly a 220-day growing season. To be safe most years, wait until Mar 9 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Apr 26 | Apr 9 | Mar 24 |
| Freeze (32°F) | Apr 15 | Mar 29 | Mar 9 |
| Hard (28°F) | Apr 3 | Mar 13 | Feb 24 |
| Severe (24°F) | Mar 19 | Mar 1 | Feb 6 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 26 | Apr 20 | Apr 16 | Apr 12 | Apr 9 | Apr 6 | Apr 4 | Mar 30 | Mar 24 |
| 32°F | Apr 15 | Apr 7 | Apr 4 | Apr 1 | Mar 29 | Mar 24 | Mar 21 | Mar 15 | Mar 9 |
| 28°F | Apr 3 | Mar 27 | Mar 21 | Mar 16 | Mar 13 | Mar 9 | Mar 6 | Mar 1 | Feb 24 |
| 24°F | Mar 19 | Mar 13 | Mar 8 | Mar 5 | Mar 1 | Feb 27 | Feb 23 | Feb 16 | Feb 6 |
| 20°F | Mar 11 | Mar 4 | Feb 28 | Feb 24 | Feb 18 | Feb 12 | Feb 4 | Jan 31 | Jan 19 |
| 16°F | Mar 1 | Feb 23 | Feb 15 | Feb 8 | Feb 2 | Jan 30 | Jan 24 | Jan 14 | Jan 4 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 12 | Oct 25 | Nov 6 |
| Freeze (32°F) | Oct 22 | Nov 3 | Nov 20 |
| Hard (28°F) | Oct 31 | Nov 14 | Dec 4 |
| Severe (24°F) | Nov 7 | Nov 29 | Dec 24 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 12 | Oct 17 | Oct 20 | Oct 22 | Oct 25 | Oct 28 | Oct 30 | Nov 2 | Nov 6 |
| 32°F | Oct 22 | Oct 26 | Oct 30 | Nov 1 | Nov 3 | Nov 5 | Nov 8 | Nov 13 | Nov 20 |
| 28°F | Oct 31 | Nov 3 | Nov 6 | Nov 10 | Nov 14 | Nov 17 | Nov 22 | Nov 28 | Dec 4 |
| 24°F | Nov 7 | Nov 13 | Nov 17 | Nov 23 | Nov 29 | Dec 2 | Dec 6 | Dec 14 | Dec 24 |
| 20°F | Nov 17 | Nov 28 | Dec 4 | Dec 10 | Dec 18 | Dec 25 | Dec 31 | Jan 4 | Jan 14 |
| 16°F | Dec 5 | Dec 15 | Dec 25 | Dec 30 | Jan 2 | Jan 6 | Jan 12 | Jan 20 | Feb 1 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Collierville, Tn, about 1 miles away@if(!empty($station['elevation_ft'])), at 300 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Collierville, TN?
On average, the last spring frost (32°F) around Collierville, TN is about Mar 29. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 9.
When is the first frost in the fall?
The first fall frost around Collierville, TN typically arrives about Nov 3. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Mar 29 on average, or Mar 9 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 220 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 38017 Planting calendar → Tennessee frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026