Frost dates for 14854Jacksonville, NY
The average last spring frost in Jacksonville is May 11 and the average first fall frost is October 3, giving a typical growing season of about 145 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 11
- Average first fall frost
- Oct 3
- Growing season
- 145 days
Safer after May 26 (1-in-10 risk)
Possible by Sep 21 (1-in-10 risk)
Last frost typically in 190 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) | May 8 · May 24 · Jun 6 | Sep 10 · Sep 23 · Oct 6 | 122 days | 100% |
| Frost / freeze (32°F) | Apr 27 · May 11 · May 26 | Sep 21 · Oct 3 · Oct 21 | 145 days | 100% |
| Hard freeze (28°F) | Apr 17 · Apr 30 · May 16 | Oct 1 · Oct 18 · Nov 4 | 169 days | 100% |
Planting calendar for Jacksonville
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 | Apr 10 – Jun 16 |
| Tomatoes | Transplant outdoors | May 27 – Jun 13 |
| Peppers | Start seeds indoors | Apr 10 – May 11 |
| Peppers | Transplant outdoors | Jun 10 – Jul 11 |
| Eggplant | Start seeds indoors | Apr 27 – May 26 |
| Eggplant | Transplant outdoors | Jun 10 – Jul 11 |
| Cucumbers | Sow outdoors | Jun 10 – Jun 23 |
| Summer squash | Sow outdoors | May 27 – Jul 11 |
| Winter squash & pumpkins | Sow outdoors | Jun 10 – Jul 11 |
| Snap beans | Sow outdoors | May 27 – Jul 16 |
| Sweet corn | Sow outdoors | May 27 – Jun 13 |
| Watermelon & cantaloupe | Sow outdoors | Jun 10 – Jul 11 |
| Okra | Sow outdoors | Jun 3 – Jun 26 |
| Peas | Sow outdoors (spring) | Apr 10 – May 26 |
| Potatoes | Plant outdoors (spring) | Apr 10 – Jun 10 |
| Onions | Start seeds indoors (spring) | Feb 27 – Mar 26 |
| Onions | Transplant outdoors (spring) | Apr 27 – May 26 |
| Broccoli | Start seeds indoors (spring) | Mar 23 – Apr 26 |
| Broccoli | Transplant outdoors (spring) | Apr 27 – May 26 |
| Broccoli | Start seeds indoors (fall) | Jun 3 – Jun 13 |
| Broccoli | Transplant outdoors (fall) | Jul 3 – Jul 14 |
| Cabbage | Start seeds indoors (spring) | Mar 13 – Apr 10 |
| Cabbage | Transplant outdoors (spring) | Apr 10 – May 11 |
| Cabbage | Start seeds indoors (fall) | May 24 – Jun 23 |
| Cabbage | Transplant outdoors (fall) | Jun 23 – Jul 24 |
| Leaf lettuce | Sow outdoors (spring) | Apr 10 – Jun 26 |
| Leaf lettuce | Sow outdoors (fall) | Jun 23 – Aug 9 |
| Spinach | Sow outdoors (spring) | Apr 3 – May 17 |
| Spinach | Sow outdoors (fall) | Jul 10 – Aug 14 |
| Radishes | Sow outdoors (spring) | Apr 10 – May 31 |
| Radishes | Sow outdoors (fall) | Jun 23 – Aug 24 |
| Kale | Sow outdoors (spring) | Apr 27 – May 17 |
| Kale | Sow outdoors (fall) | Jun 16 – Jul 24 |
| Carrots | Sow outdoors (spring) | May 11 – Jun 26 |
| Carrots | Sow outdoors (fall) | May 24 – Jul 9 |
| Garlic | Plant outdoors (fall) | Sep 23 – Oct 24 |
Where these dates come from
ZIP code 14854 is matched to the NOAA station Ithaca Cornell Univ, NY, 15.1 km away, at 960 ft elevation (67 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Ithaca Cornell Univ, NY (used) | 960 ft | May 11 | Oct 3 |
| Mecklenburg 4Sw, NY | 1,510 ft | May 10 | Oct 8 |
| Freeville 1 Ne, NY | 1,050 ft | May 7 | Oct 8 |
| Aurora Rsch Farm, NY | 830 ft | May 1 | Oct 21 |
Frost dates near Jacksonville
- Trumansburg, NY 14886 · last May 11, first Oct 3
- Lansing, NY 14882 · last May 11, first Oct 3
- Mecklenburg, NY 14863 · last May 10, first Oct 8
- Ithaca, NY 14851 · last May 11, first Oct 3
- Interlaken, NY 14847 · last May 1, first Oct 21
- Newfield, NY 14867 · last May 11, first Oct 3
- King Ferry, NY 13081 · last May 1, first Oct 21
- Etna, NY 13062 · last May 11, first Oct 3
Frequently asked questions
- When is the last frost in Jacksonville, NY?
- For ZIP code 14854, the average last spring frost (32°F) is May 11, based on NOAA 1991-2020 climate normals for the Ithaca Cornell Univ, NY weather station. There is a 1-in-10 chance of a frost after May 26.
- When is the first frost in Jacksonville, NY?
- The average first fall frost (32°F) is October 3. There is a 1-in-10 chance of frost by September 21, so tender plants are at risk from that point on.
- How long is the growing season in 14854?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 145 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.