Frost dates for 11725Commack, NY
The average last spring frost in Commack 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 Commack
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 11725 is matched to the NOAA station Centerport, NY, 9 km away, at 30 ft elevation (115 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 |
| Islip Li Macarthur Ap, NY | 84 ft | Apr 10 | Nov 2 |
| Farmingdale Ap, NY | 81 ft | Apr 6 | Nov 6 |
| Setauket Strong, NY | 40 ft | Apr 15 | Nov 10 |
Frost dates near Commack
- East Northport, NY 11731 · last Apr 9, first Nov 10
- Kings Park, NY 11754 · last Apr 9, first Nov 10
- Smithtown, NY 11787 · last Apr 9, first Nov 10
- Brentwood, NY 11717 · last Apr 10, first Nov 2
- Hauppauge, NY 11788 · last Apr 10, first Nov 2
- Greenlawn, NY 11740 · last Apr 9, first Nov 10
- Huntington Station, NY 11746 · last Apr 6, first Nov 6
- Northport, NY 11768 · last Apr 9, first Nov 10
Frequently asked questions
- When is the last frost in Commack, NY?
- For ZIP code 11725, 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 Commack, 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 11725?
- 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.