Frost dates for 11952Mattituck, NY
The average last spring frost in Mattituck is April 19 and the average first fall frost is November 1, giving a typical growing season of about 196 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 19
- Average first fall frost
- Nov 1
- Growing season
- 196 days
Safer after May 4 (1-in-10 risk)
Possible by Oct 17 (1-in-10 risk)
Last frost typically in 167 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 20 · May 3 · May 16 | Oct 6 · Oct 21 · Nov 4 | 170 days | 100% |
| Frost / freeze (32°F) | Apr 5 · Apr 19 · May 4 | Oct 17 · Nov 1 · Nov 14 | 196 days | 100% |
| Hard freeze (28°F) | Mar 22 · Apr 4 · Apr 19 | Oct 30 · Nov 12 · Nov 28 | 221 days | 100% |
Planting calendar for Mattituck
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 19 – May 25 |
| Tomatoes | Transplant outdoors | May 5 – Jul 12 |
| Peppers | Start seeds indoors | Mar 19 – Apr 19 |
| Peppers | Transplant outdoors | May 19 – Jun 19 |
| Eggplant | Start seeds indoors | Apr 5 – May 4 |
| Eggplant | Transplant outdoors | May 19 – Jun 19 |
| Cucumbers | Sow outdoors | May 19 – Jul 22 |
| Summer squash | Sow outdoors | May 5 – Jun 19 |
| Winter squash & pumpkins | Sow outdoors | May 19 – Jun 19 |
| Snap beans | Sow outdoors | May 5 – Aug 14 |
| Sweet corn | Sow outdoors | May 5 – Jul 12 |
| Watermelon & cantaloupe | Sow outdoors | May 19 – Jun 19 |
| Okra | Sow outdoors | May 12 – Jun 4 |
| Peas | Sow outdoors (spring) | Mar 19 – May 4 |
| Potatoes | Plant outdoors (spring) | Mar 19 – May 19 |
| Onions | Start seeds indoors (spring) | Feb 5 – Mar 4 |
| Onions | Transplant outdoors (spring) | Apr 5 – May 4 |
| Broccoli | Start seeds indoors (spring) | Mar 1 – Apr 4 |
| Broccoli | Transplant outdoors (spring) | Apr 5 – May 4 |
| Broccoli | Start seeds indoors (fall) | Jul 2 – Jul 12 |
| Broccoli | Transplant outdoors (fall) | Aug 1 – Aug 12 |
| Cabbage | Start seeds indoors (spring) | Feb 19 – Mar 19 |
| Cabbage | Transplant outdoors (spring) | Mar 19 – Apr 19 |
| Cabbage | Start seeds indoors (fall) | Jun 22 – Jul 22 |
| Cabbage | Transplant outdoors (fall) | Jul 22 – Aug 22 |
| Leaf lettuce | Sow outdoors (spring) | Mar 19 – Jun 4 |
| Leaf lettuce | Sow outdoors (fall) | Jul 22 – Sep 7 |
| Spinach | Sow outdoors (spring) | Mar 12 – Apr 25 |
| Spinach | Sow outdoors (fall) | Aug 8 – Sep 12 |
| Radishes | Sow outdoors (spring) | Mar 19 – May 9 |
| Radishes | Sow outdoors (fall) | Jul 22 – Sep 22 |
| Kale | Sow outdoors (spring) | Apr 5 – Apr 25 |
| Kale | Sow outdoors (fall) | Jul 15 – Aug 22 |
| Carrots | Sow outdoors (spring) | Apr 19 – Jun 4 |
| Carrots | Sow outdoors (fall) | Jun 22 – Aug 7 |
| Garlic | Plant outdoors (fall) | Oct 22 – Nov 22 |
Where these dates come from
ZIP code 11952 is matched to the NOAA station Mattituck, NY, 2.3 km away, at 20 ft elevation (7 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Mattituck, NY (used) | 20 ft | Apr 19 | Nov 1 |
| Riverhead Rsch Farm, NY | 100 ft | Apr 6 | Nov 9 |
| Baiting Hollow, NY | 70 ft | Apr 24 | Oct 25 |
| Westhamptn Gabreski Ap, NY | 67 ft | May 7 | Oct 14 |
Frost dates near Mattituck
- Laurel, NY 11948 · last Apr 6, first Nov 9
- New Suffolk, NY 11956 · last Apr 23, first Oct 24
- Cutchogue, NY 11935 · last Apr 23, first Oct 24
- Jamesport, NY 11947 · last May 7, first Oct 14
- South Jamesport, NY 11970 · last May 7, first Oct 14
- Peconic, NY 11958 · last Apr 23, first Oct 24
- Aquebogue, NY 11931 · last Apr 6, first Nov 9
- Southold, NY 11971 · last Apr 23, first Oct 24
Frequently asked questions
- When is the last frost in Mattituck, NY?
- For ZIP code 11952, the average last spring frost (32°F) is April 19, based on NOAA 1991-2020 climate normals for the Mattituck, NY weather station. There is a 1-in-10 chance of a frost after May 4.
- When is the first frost in Mattituck, NY?
- The average first fall frost (32°F) is November 1. There is a 1-in-10 chance of frost by October 17, so tender plants are at risk from that point on.
- How long is the growing season in 11952?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 196 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.