Frost dates for 37023Big Rock, TN
The average last spring frost in Big Rock is April 4 and the average first fall frost is October 31, giving a typical growing season of about 210 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 4
- Average first fall frost
- Oct 31
- Growing season
- 210 days
Safer after Apr 21 (1-in-10 risk)
Possible by Oct 18 (1-in-10 risk)
Last frost typically in 152 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 1 · Apr 17 · May 1 | Oct 10 · Oct 22 · Nov 1 | 188 days | 100% |
| Frost / freeze (32°F) | Mar 17 · Apr 4 · Apr 21 | Oct 18 · Oct 31 · Nov 15 | 210 days | 100% |
| Hard freeze (28°F) | Mar 1 · Mar 23 · Apr 9 | Oct 31 · Nov 11 · Nov 30 | 234 days | 100% |
Planting calendar for Big Rock
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 4 – May 10 |
| Tomatoes | Transplant outdoors | Apr 20 – Jul 11 |
| Peppers | Start seeds indoors | Mar 4 – Apr 4 |
| Peppers | Transplant outdoors | May 4 – Jun 4 |
| Eggplant | Start seeds indoors | Mar 21 – Apr 19 |
| Eggplant | Transplant outdoors | May 4 – Jun 4 |
| Cucumbers | Sow outdoors | May 4 – Jul 21 |
| Summer squash | Sow outdoors | Apr 20 – Jun 4 |
| Winter squash & pumpkins | Sow outdoors | May 4 – Jun 4 |
| Snap beans | Sow outdoors | Apr 20 – Aug 13 |
| Sweet corn | Sow outdoors | Apr 20 – Jul 11 |
| Watermelon & cantaloupe | Sow outdoors | May 4 – Jun 4 |
| Okra | Sow outdoors | Apr 27 – May 20 |
| Peas | Sow outdoors (spring) | Mar 4 – Apr 19 |
| Potatoes | Plant outdoors (spring) | Mar 4 – May 4 |
| Onions | Start seeds indoors (spring) | Jan 21 – Feb 17 |
| Onions | Transplant outdoors (spring) | Mar 21 – Apr 19 |
| Broccoli | Start seeds indoors (spring) | Feb 14 – Mar 20 |
| Broccoli | Transplant outdoors (spring) | Mar 21 – Apr 19 |
| Broccoli | Start seeds indoors (fall) | Jul 1 – Jul 11 |
| Broccoli | Transplant outdoors (fall) | Jul 31 – Aug 11 |
| Cabbage | Start seeds indoors (spring) | Feb 4 – Mar 4 |
| Cabbage | Transplant outdoors (spring) | Mar 4 – Apr 4 |
| Cabbage | Start seeds indoors (fall) | Jun 21 – Jul 21 |
| Cabbage | Transplant outdoors (fall) | Jul 21 – Aug 21 |
| Leaf lettuce | Sow outdoors (spring) | Mar 4 – May 20 |
| Leaf lettuce | Sow outdoors (fall) | Jul 21 – Sep 6 |
| Spinach | Sow outdoors (spring) | Feb 25 – Apr 10 |
| Spinach | Sow outdoors (fall) | Aug 7 – Sep 11 |
| Radishes | Sow outdoors (spring) | Mar 4 – Apr 24 |
| Radishes | Sow outdoors (fall) | Jul 21 – Sep 21 |
| Kale | Sow outdoors (spring) | Mar 21 – Apr 10 |
| Kale | Sow outdoors (fall) | Jul 14 – Aug 21 |
| Carrots | Sow outdoors (spring) | Apr 4 – May 20 |
| Carrots | Sow outdoors (fall) | Jun 21 – Aug 6 |
| Garlic | Plant outdoors (fall) | Oct 21 – Nov 21 |
Where these dates come from
ZIP code 37023 is matched to the NOAA station Dover 1 W, TN, 15 km away, at 475 ft elevation (161 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Dover 1 W, TN (used) | 475 ft | Apr 4 | Oct 31 |
| Tennessee Ridge, TN | 722 ft | Apr 7 | Nov 3 |
| Clarksville Outlaw Ap, TN | 560 ft | Apr 6 | Oct 28 |
| Clarksville Wwtp, TN | 402 ft | Apr 3 | Nov 1 |
Frost dates near Big Rock
- Indian Mound, TN 37079 · last Apr 4, first Oct 31
- La Fayette, KY 42254 · last Apr 6, first Oct 28
- Bumpus Mills, TN 37028 · last Apr 4, first Oct 31
- Dover, TN 37058 · last Apr 4, first Oct 31
- Woodlawn, TN 37191 · last Apr 6, first Oct 28
- Herndon, KY 42236 · last Apr 4, first Nov 2
- Cumberland City, TN 37050 · last Apr 7, first Nov 3
- Fort Campbell, KY 42223 · last Apr 6, first Oct 28
Frequently asked questions
- When is the last frost in Big Rock, TN?
- For ZIP code 37023, the average last spring frost (32°F) is April 4, based on NOAA 1991-2020 climate normals for the Dover 1 W, TN weather station. There is a 1-in-10 chance of a frost after April 21.
- When is the first frost in Big Rock, TN?
- The average first fall frost (32°F) is October 31. There is a 1-in-10 chance of frost by October 18, so tender plants are at risk from that point on.
- How long is the growing season in 37023?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 210 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.