Frost dates for 40336Irvine, KY
The average last spring frost in Irvine is April 20 and the average first fall frost is October 19, giving a typical growing season of about 182 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 20
- Average first fall frost
- Oct 19
- Growing season
- 182 days
Safer after May 8 (1-in-10 risk)
Possible by Oct 8 (1-in-10 risk)
Last frost typically in 168 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 17 · Apr 30 · May 17 | Oct 1 · Oct 11 · Oct 22 | 162 days | 100% |
| Frost / freeze (32°F) | Apr 6 · Apr 20 · May 8 | Oct 8 · Oct 19 · Oct 31 | 182 days | 100% |
| Hard freeze (28°F) | Mar 24 · Apr 7 · Apr 23 | Oct 17 · Oct 30 · Nov 12 | 204 days | 100% |
Planting calendar for Irvine
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 20 – May 26 |
| Tomatoes | Transplant outdoors | May 6 – Jun 29 |
| Peppers | Start seeds indoors | Mar 20 – Apr 20 |
| Peppers | Transplant outdoors | May 20 – Jun 20 |
| Eggplant | Start seeds indoors | Apr 6 – May 5 |
| Eggplant | Transplant outdoors | May 20 – Jun 20 |
| Cucumbers | Sow outdoors | May 20 – Jul 9 |
| Summer squash | Sow outdoors | May 6 – Jun 20 |
| Winter squash & pumpkins | Sow outdoors | May 20 – Jun 20 |
| Snap beans | Sow outdoors | May 6 – Aug 1 |
| Sweet corn | Sow outdoors | May 6 – Jun 29 |
| Watermelon & cantaloupe | Sow outdoors | May 20 – Jun 20 |
| Okra | Sow outdoors | May 13 – Jun 5 |
| Peas | Sow outdoors (spring) | Mar 20 – May 5 |
| Potatoes | Plant outdoors (spring) | Mar 20 – May 20 |
| Onions | Start seeds indoors (spring) | Feb 6 – Mar 5 |
| Onions | Transplant outdoors (spring) | Apr 6 – May 5 |
| Broccoli | Start seeds indoors (spring) | Mar 2 – Apr 5 |
| Broccoli | Transplant outdoors (spring) | Apr 6 – May 5 |
| Broccoli | Start seeds indoors (fall) | Jun 19 – Jun 29 |
| Broccoli | Transplant outdoors (fall) | Jul 19 – Jul 30 |
| Cabbage | Start seeds indoors (spring) | Feb 20 – Mar 20 |
| Cabbage | Transplant outdoors (spring) | Mar 20 – Apr 20 |
| Cabbage | Start seeds indoors (fall) | Jun 9 – Jul 9 |
| Cabbage | Transplant outdoors (fall) | Jul 9 – Aug 9 |
| Leaf lettuce | Sow outdoors (spring) | Mar 20 – Jun 5 |
| Leaf lettuce | Sow outdoors (fall) | Jul 9 – Aug 25 |
| Spinach | Sow outdoors (spring) | Mar 13 – Apr 26 |
| Spinach | Sow outdoors (fall) | Jul 26 – Aug 30 |
| Radishes | Sow outdoors (spring) | Mar 20 – May 10 |
| Radishes | Sow outdoors (fall) | Jul 9 – Sep 9 |
| Kale | Sow outdoors (spring) | Apr 6 – Apr 26 |
| Kale | Sow outdoors (fall) | Jul 2 – Aug 9 |
| Carrots | Sow outdoors (spring) | Apr 20 – Jun 5 |
| Carrots | Sow outdoors (fall) | Jun 9 – Jul 25 |
| Garlic | Plant outdoors (fall) | Oct 9 – Nov 9 |
Where these dates come from
ZIP code 40336 is matched to the NOAA station Cressy, KY, 16.6 km away, at 720 ft elevation (107 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Cressy, KY (used) | 720 ft | Apr 20 | Oct 19 |
| Stanton 2W, KY | 720 ft | Apr 19 | Oct 20 |
| Beattyville 4N, KY | 1,080 ft | Apr 12 | Oct 25 |
| Heidelberg, KY | 665 ft | Apr 17 | Oct 22 |
Frost dates near Irvine
- Ravenna, KY 40472 · last Apr 20, first Oct 19
- Waco, KY 40385 · last Apr 20, first Oct 19
- Clay City, KY 40312 · last Apr 19, first Oct 20
- Stanton, KY 40380 · last Apr 19, first Oct 20
- Waneta, KY 40488 · last Apr 5, first Nov 2
- Sandgap, KY 40481 · last Apr 5, first Nov 2
- Bighill, KY 40405 · last Apr 5, first Nov 2
- Beattyville, KY 41311 · last Apr 12, first Oct 25
Frequently asked questions
- When is the last frost in Irvine, KY?
- For ZIP code 40336, the average last spring frost (32°F) is April 20, based on NOAA 1991-2020 climate normals for the Cressy, KY weather station. There is a 1-in-10 chance of a frost after May 8.
- When is the first frost in Irvine, KY?
- The average first fall frost (32°F) is October 19. There is a 1-in-10 chance of frost by October 8, so tender plants are at risk from that point on.
- How long is the growing season in 40336?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 182 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.