Frost dates for 40330Harrodsburg, KY
The average last spring frost in Harrodsburg is April 7 and the average first fall frost is November 1, giving a typical growing season of about 206 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 7
- Average first fall frost
- Nov 1
- Growing season
- 206 days
Safer after Apr 24 (1-in-10 risk)
Possible by Oct 20 (1-in-10 risk)
Last frost typically in 155 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 5 · Apr 21 · May 10 | Oct 9 · Oct 22 · Nov 2 | 183 days | 100% |
| Frost / freeze (32°F) | Mar 25 · Apr 7 · Apr 24 | Oct 20 · Nov 1 · Nov 11 | 206 days | 100% |
| Hard freeze (28°F) | Mar 11 · Mar 29 · Apr 11 | Oct 30 · Nov 8 · Nov 19 | 226 days | 100% |
Planting calendar for Harrodsburg
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 7 – May 13 |
| Tomatoes | Transplant outdoors | Apr 23 – Jul 12 |
| Peppers | Start seeds indoors | Mar 7 – Apr 7 |
| Peppers | Transplant outdoors | May 7 – Jun 7 |
| Eggplant | Start seeds indoors | Mar 24 – Apr 22 |
| Eggplant | Transplant outdoors | May 7 – Jun 7 |
| Cucumbers | Sow outdoors | May 7 – Jul 22 |
| Summer squash | Sow outdoors | Apr 23 – Jun 7 |
| Winter squash & pumpkins | Sow outdoors | May 7 – Jun 7 |
| Snap beans | Sow outdoors | Apr 23 – Aug 14 |
| Sweet corn | Sow outdoors | Apr 23 – Jul 12 |
| Watermelon & cantaloupe | Sow outdoors | May 7 – Jun 7 |
| Okra | Sow outdoors | Apr 30 – May 23 |
| Peas | Sow outdoors (spring) | Mar 7 – Apr 22 |
| Potatoes | Plant outdoors (spring) | Mar 7 – May 7 |
| Onions | Start seeds indoors (spring) | Jan 24 – Feb 20 |
| Onions | Transplant outdoors (spring) | Mar 24 – Apr 22 |
| Broccoli | Start seeds indoors (spring) | Feb 17 – Mar 23 |
| Broccoli | Transplant outdoors (spring) | Mar 24 – Apr 22 |
| Broccoli | Start seeds indoors (fall) | Jul 2 – Jul 12 |
| Broccoli | Transplant outdoors (fall) | Aug 1 – Aug 12 |
| Cabbage | Start seeds indoors (spring) | Feb 7 – Mar 7 |
| Cabbage | Transplant outdoors (spring) | Mar 7 – Apr 7 |
| Cabbage | Start seeds indoors (fall) | Jun 22 – Jul 22 |
| Cabbage | Transplant outdoors (fall) | Jul 22 – Aug 22 |
| Leaf lettuce | Sow outdoors (spring) | Mar 7 – May 23 |
| Leaf lettuce | Sow outdoors (fall) | Jul 22 – Sep 7 |
| Spinach | Sow outdoors (spring) | Feb 28 – Apr 13 |
| Spinach | Sow outdoors (fall) | Aug 8 – Sep 12 |
| Radishes | Sow outdoors (spring) | Mar 7 – Apr 27 |
| Radishes | Sow outdoors (fall) | Jul 22 – Sep 22 |
| Kale | Sow outdoors (spring) | Mar 24 – Apr 13 |
| Kale | Sow outdoors (fall) | Jul 15 – Aug 22 |
| Carrots | Sow outdoors (spring) | Apr 7 – May 23 |
| Carrots | Sow outdoors (fall) | Jun 22 – Aug 7 |
| Garlic | Plant outdoors (fall) | Oct 22 – Nov 22 |
Where these dates come from
ZIP code 40330 is matched to the NOAA station Dix Dam, KY, 13.6 km away, at 870 ft elevation (12 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Dix Dam, KY (used) | 870 ft | Apr 7 | Nov 1 |
| Danville, KY | 900 ft | Apr 9 | Oct 27 |
| Versailles 3 Nnw, KY | 891 ft | Apr 12 | Oct 28 |
| Lexington Bluegrass Ap, KY | 980 ft | Apr 13 | Oct 28 |
Frost dates near Harrodsburg
- Burgin, KY 40310 · last Apr 7, first Nov 1
- Salvisa, KY 40372 · last Apr 7, first Nov 1
- Wilmore, KY 40390 · last Apr 7, first Nov 1
- Mackville, KY 40040 · last Apr 9, first Oct 27
- Danville, KY 40422 · last Apr 9, first Oct 27
- Perryville, KY 40468 · last Apr 9, first Oct 27
- Bryantsville, KY 40410 · last Apr 7, first Nov 1
- Mitchellsburg, KY 40452 · last Apr 9, first Oct 27
Frequently asked questions
- When is the last frost in Harrodsburg, KY?
- For ZIP code 40330, the average last spring frost (32°F) is April 7, based on NOAA 1991-2020 climate normals for the Dix Dam, KY weather station. There is a 1-in-10 chance of a frost after April 24.
- When is the first frost in Harrodsburg, KY?
- The average first fall frost (32°F) is November 1. There is a 1-in-10 chance of frost by October 20, so tender plants are at risk from that point on.
- How long is the growing season in 40330?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 206 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.