Frost dates for 11731East Northport, NY
The average last spring frost in East Northport is April 9 and the average first fall frost is November 10, giving a typical growing season of about 215 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 9
- Average first fall frost
- Nov 10
- Growing season
- 215 days
Safer after Apr 23 (1-in-10 risk)
Possible by Oct 30 (1-in-10 risk)
First frost typically in 7 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 9 · Apr 22 · May 7 | Oct 17 · Oct 31 · Nov 12 | 191 days | 100% |
| Frost / freeze (32°F) | Mar 30 · Apr 9 · Apr 23 | Oct 30 · Nov 10 · Nov 26 | 215 days | 100% |
| Hard freeze (28°F) | Mar 16 · Mar 30 · Apr 10 | Nov 6 · Nov 21 · Dec 7 | 237 days | 100% |
Planting calendar for East Northport
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 9 – May 15 |
| Tomatoes | Transplant outdoors | Apr 25 – Jul 21 |
| Peppers | Start seeds indoors | Mar 9 – Apr 9 |
| Peppers | Transplant outdoors | May 9 – Jun 9 |
| Eggplant | Start seeds indoors | Mar 26 – Apr 24 |
| Eggplant | Transplant outdoors | May 9 – Jun 9 |
| Cucumbers | Sow outdoors | May 9 – Jul 31 |
| Summer squash | Sow outdoors | Apr 25 – Jun 9 |
| Winter squash & pumpkins | Sow outdoors | May 9 – Jun 9 |
| Snap beans | Sow outdoors | Apr 25 – Aug 23 |
| Sweet corn | Sow outdoors | Apr 25 – Jul 21 |
| Watermelon & cantaloupe | Sow outdoors | May 9 – Jun 9 |
| Okra | Sow outdoors | May 2 – May 25 |
| Peas | Sow outdoors (spring) | Mar 9 – Apr 24 |
| Potatoes | Plant outdoors (spring) | Mar 9 – May 9 |
| Onions | Start seeds indoors (spring) | Jan 26 – Feb 22 |
| Onions | Transplant outdoors (spring) | Mar 26 – Apr 24 |
| Broccoli | Start seeds indoors (spring) | Feb 19 – Mar 25 |
| Broccoli | Transplant outdoors (spring) | Mar 26 – Apr 24 |
| Broccoli | Start seeds indoors (fall) | Jul 11 – Jul 21 |
| Broccoli | Transplant outdoors (fall) | Aug 10 – Aug 21 |
| Cabbage | Start seeds indoors (spring) | Feb 9 – Mar 9 |
| Cabbage | Transplant outdoors (spring) | Mar 9 – Apr 9 |
| Cabbage | Start seeds indoors (fall) | Jul 1 – Jul 31 |
| Cabbage | Transplant outdoors (fall) | Jul 31 – Aug 31 |
| Leaf lettuce | Sow outdoors (spring) | Mar 9 – May 25 |
| Leaf lettuce | Sow outdoors (fall) | Jul 31 – Sep 16 |
| Spinach | Sow outdoors (spring) | Mar 2 – Apr 15 |
| Spinach | Sow outdoors (fall) | Aug 17 – Sep 21 |
| Radishes | Sow outdoors (spring) | Mar 9 – Apr 29 |
| Radishes | Sow outdoors (fall) | Jul 31 – Oct 1 |
| Kale | Sow outdoors (spring) | Mar 26 – Apr 15 |
| Kale | Sow outdoors (fall) | Jul 24 – Aug 31 |
| Carrots | Sow outdoors (spring) | Apr 9 – May 25 |
| Carrots | Sow outdoors (fall) | Jul 1 – Aug 16 |
| Garlic | Plant outdoors (fall) | Oct 31 – Dec 1 |
Where these dates come from
ZIP code 11731 is matched to the NOAA station Centerport, NY, 5.7 km away, at 30 ft elevation (160 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Centerport, NY (used) | 30 ft | Apr 9 | Nov 10 |
| Farmingdale Ap, NY | 81 ft | Apr 6 | Nov 6 |
| Islip Li Macarthur Ap, NY | 84 ft | Apr 10 | Nov 2 |
| Setauket Strong, NY | 40 ft | Apr 15 | Nov 10 |
Frost dates near East Northport
- Commack, NY 11725 · last Apr 9, first Nov 10
- Greenlawn, NY 11740 · last Apr 9, first Nov 10
- Northport, NY 11768 · last Apr 9, first Nov 10
- Huntington Station, NY 11746 · last Apr 6, first Nov 6
- Centerport, NY 11721 · last Apr 9, first Nov 10
- Kings Park, NY 11754 · last Apr 9, first Nov 10
- Huntington, NY 11743 · last Apr 9, first Nov 10
- Smithtown, NY 11787 · last Apr 9, first Nov 10
Frequently asked questions
- When is the last frost in East Northport, NY?
- For ZIP code 11731, the average last spring frost (32°F) is April 9, based on NOAA 1991-2020 climate normals for the Centerport, NY weather station. There is a 1-in-10 chance of a frost after April 23.
- When is the first frost in East Northport, NY?
- The average first fall frost (32°F) is November 10. There is a 1-in-10 chance of frost by October 30, so tender plants are at risk from that point on.
- How long is the growing season in 11731?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 215 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.