Frost dates for 37042Clarksville, TN
The average last spring frost in Clarksville is April 6 and the average first fall frost is October 28, giving a typical growing season of about 204 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 6
- Average first fall frost
- Oct 28
- Growing season
- 204 days
Safer after Apr 23 (1-in-10 risk)
Possible by Oct 15 (1-in-10 risk)
Last frost typically in 154 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 3 · Apr 18 · May 4 | Oct 7 · Oct 19 · Oct 31 | 183 days | 100% |
| Frost / freeze (32°F) | Mar 20 · Apr 6 · Apr 23 | Oct 15 · Oct 28 · Nov 9 | 204 days | 100% |
| Hard freeze (28°F) | Mar 7 · Mar 25 · Apr 11 | Oct 26 · Nov 7 · Nov 24 | 227 days | 100% |
Planting calendar for Clarksville
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 6 – May 12 |
| Tomatoes | Transplant outdoors | Apr 22 – Jul 8 |
| Peppers | Start seeds indoors | Mar 6 – Apr 6 |
| Peppers | Transplant outdoors | May 6 – Jun 6 |
| Eggplant | Start seeds indoors | Mar 23 – Apr 21 |
| Eggplant | Transplant outdoors | May 6 – Jun 6 |
| Cucumbers | Sow outdoors | May 6 – Jul 18 |
| Summer squash | Sow outdoors | Apr 22 – Jun 6 |
| Winter squash & pumpkins | Sow outdoors | May 6 – Jun 6 |
| Snap beans | Sow outdoors | Apr 22 – Aug 10 |
| Sweet corn | Sow outdoors | Apr 22 – Jul 8 |
| Watermelon & cantaloupe | Sow outdoors | May 6 – Jun 6 |
| Okra | Sow outdoors | Apr 29 – May 22 |
| Peas | Sow outdoors (spring) | Mar 6 – Apr 21 |
| Potatoes | Plant outdoors (spring) | Mar 6 – May 6 |
| Onions | Start seeds indoors (spring) | Jan 23 – Feb 19 |
| Onions | Transplant outdoors (spring) | Mar 23 – Apr 21 |
| Broccoli | Start seeds indoors (spring) | Feb 16 – Mar 22 |
| Broccoli | Transplant outdoors (spring) | Mar 23 – Apr 21 |
| Broccoli | Start seeds indoors (fall) | Jun 28 – Jul 8 |
| Broccoli | Transplant outdoors (fall) | Jul 28 – Aug 8 |
| Cabbage | Start seeds indoors (spring) | Feb 6 – Mar 6 |
| Cabbage | Transplant outdoors (spring) | Mar 6 – Apr 6 |
| Cabbage | Start seeds indoors (fall) | Jun 18 – Jul 18 |
| Cabbage | Transplant outdoors (fall) | Jul 18 – Aug 18 |
| Leaf lettuce | Sow outdoors (spring) | Mar 6 – May 22 |
| Leaf lettuce | Sow outdoors (fall) | Jul 18 – Sep 3 |
| Spinach | Sow outdoors (spring) | Feb 27 – Apr 12 |
| Spinach | Sow outdoors (fall) | Aug 4 – Sep 8 |
| Radishes | Sow outdoors (spring) | Mar 6 – Apr 26 |
| Radishes | Sow outdoors (fall) | Jul 18 – Sep 18 |
| Kale | Sow outdoors (spring) | Mar 23 – Apr 12 |
| Kale | Sow outdoors (fall) | Jul 11 – Aug 18 |
| Carrots | Sow outdoors (spring) | Apr 6 – May 22 |
| Carrots | Sow outdoors (fall) | Jun 18 – Aug 3 |
| Garlic | Plant outdoors (fall) | Oct 18 – Nov 18 |
Where these dates come from
ZIP code 37042 is matched to the NOAA station Clarksville Outlaw Ap, TN, 4.3 km away, at 560 ft elevation (22 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Clarksville Outlaw Ap, TN (used) | 560 ft | Apr 6 | Oct 28 |
| Clarksville Wwtp, TN | 402 ft | Apr 3 | Nov 1 |
| Clarksville No.2, TN | 496 ft | Apr 10 | Oct 30 |
| Hopkinsville, KY | 520 ft | Apr 4 | Nov 2 |
Frost dates near Clarksville
- Clarksville, TN 37044 · last Apr 10, first Oct 30
- Fort Campbell, KY 42223 · last Apr 6, first Oct 28
- Oak Grove, KY 42262 · last Apr 6, first Oct 28
- Woodlawn, TN 37191 · last Apr 6, first Oct 28
- Palmyra, TN 37142 · last Apr 10, first Oct 30
- Trenton, KY 42286 · last Apr 6, first Oct 28
- Herndon, KY 42236 · last Apr 4, first Nov 2
- Pembroke, KY 42266 · last Apr 6, first Oct 28
Frequently asked questions
- When is the last frost in Clarksville, TN?
- For ZIP code 37042, the average last spring frost (32°F) is April 6, based on NOAA 1991-2020 climate normals for the Clarksville Outlaw Ap, TN weather station. There is a 1-in-10 chance of a frost after April 23.
- When is the first frost in Clarksville, TN?
- The average first fall frost (32°F) is October 28. There is a 1-in-10 chance of frost by October 15, so tender plants are at risk from that point on.
- How long is the growing season in 37042?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 204 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.