Frost dates for 37044Clarksville, TN
The average last spring frost in Clarksville is April 10 and the average first fall frost is October 30, giving a typical growing season of about 203 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 10
- Average first fall frost
- Oct 30
- Growing season
- 203 days
Safer after Apr 26 (1-in-10 risk)
Possible by Oct 17 (1-in-10 risk)
Last frost typically in 158 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 6 · Apr 21 · May 8 | Oct 8 · Oct 21 · Nov 1 | 182 days | 100% |
| Frost / freeze (32°F) | Mar 26 · Apr 10 · Apr 26 | Oct 17 · Oct 30 · Nov 11 | 203 days | 100% |
| Hard freeze (28°F) | Mar 8 · Mar 29 · Apr 14 | Oct 26 · Nov 9 · 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 10 – May 16 |
| Tomatoes | Transplant outdoors | Apr 26 – Jul 10 |
| Peppers | Start seeds indoors | Mar 10 – Apr 10 |
| Peppers | Transplant outdoors | May 10 – Jun 10 |
| Eggplant | Start seeds indoors | Mar 27 – Apr 25 |
| Eggplant | Transplant outdoors | May 10 – Jun 10 |
| Cucumbers | Sow outdoors | May 10 – Jul 20 |
| Summer squash | Sow outdoors | Apr 26 – Jun 10 |
| Winter squash & pumpkins | Sow outdoors | May 10 – Jun 10 |
| Snap beans | Sow outdoors | Apr 26 – Aug 12 |
| Sweet corn | Sow outdoors | Apr 26 – Jul 10 |
| Watermelon & cantaloupe | Sow outdoors | May 10 – Jun 10 |
| Okra | Sow outdoors | May 3 – May 26 |
| Peas | Sow outdoors (spring) | Mar 10 – Apr 25 |
| Potatoes | Plant outdoors (spring) | Mar 10 – May 10 |
| Onions | Start seeds indoors (spring) | Jan 27 – Feb 23 |
| Onions | Transplant outdoors (spring) | Mar 27 – Apr 25 |
| Broccoli | Start seeds indoors (spring) | Feb 20 – Mar 26 |
| Broccoli | Transplant outdoors (spring) | Mar 27 – Apr 25 |
| Broccoli | Start seeds indoors (fall) | Jun 30 – Jul 10 |
| Broccoli | Transplant outdoors (fall) | Jul 30 – Aug 10 |
| Cabbage | Start seeds indoors (spring) | Feb 10 – Mar 10 |
| Cabbage | Transplant outdoors (spring) | Mar 10 – Apr 10 |
| Cabbage | Start seeds indoors (fall) | Jun 20 – Jul 20 |
| Cabbage | Transplant outdoors (fall) | Jul 20 – Aug 20 |
| Leaf lettuce | Sow outdoors (spring) | Mar 10 – May 26 |
| Leaf lettuce | Sow outdoors (fall) | Jul 20 – Sep 5 |
| Spinach | Sow outdoors (spring) | Mar 3 – Apr 16 |
| Spinach | Sow outdoors (fall) | Aug 6 – Sep 10 |
| Radishes | Sow outdoors (spring) | Mar 10 – Apr 30 |
| Radishes | Sow outdoors (fall) | Jul 20 – Sep 20 |
| Kale | Sow outdoors (spring) | Mar 27 – Apr 16 |
| Kale | Sow outdoors (fall) | Jul 13 – Aug 20 |
| Carrots | Sow outdoors (spring) | Apr 10 – May 26 |
| Carrots | Sow outdoors (fall) | Jun 20 – Aug 5 |
| Garlic | Plant outdoors (fall) | Oct 20 – Nov 20 |
Where these dates come from
ZIP code 37044 is matched to the NOAA station Clarksville No.2, TN, 4.1 km away, at 496 ft elevation (6 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Clarksville No.2, TN (used) | 496 ft | Apr 10 | Oct 30 |
| Clarksville Wwtp, TN | 402 ft | Apr 3 | Nov 1 |
| Clarksville Outlaw Ap, TN | 560 ft | Apr 6 | Oct 28 |
| Cheatham L&D, TN | 392 ft | Apr 9 | Nov 1 |
Frost dates near Clarksville
- Clarksville, TN 37040 · last Apr 10, first Oct 30
- Oak Grove, KY 42262 · last Apr 6, first Oct 28
- Fort Campbell, KY 42223 · last Apr 6, first Oct 28
- Woodlawn, TN 37191 · last Apr 6, first Oct 28
- Palmyra, TN 37142 · last Apr 10, first Oct 30
- Cunningham, TN 37052 · last Apr 10, first Oct 30
- Southside, TN 37171 · last Apr 9, first Nov 1
- Adams, TN 37010 · last Apr 10, first Oct 30
Frequently asked questions
- When is the last frost in Clarksville, TN?
- For ZIP code 37044, the average last spring frost (32°F) is April 10, based on NOAA 1991-2020 climate normals for the Clarksville No.2, TN weather station. There is a 1-in-10 chance of a frost after April 26.
- When is the first frost in Clarksville, TN?
- The average first fall frost (32°F) is October 30. There is a 1-in-10 chance of frost by October 17, so tender plants are at risk from that point on.
- How long is the growing season in 37044?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 203 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.