Frost dates for 12771Port Jervis, NY
The average last spring frost in Port Jervis is May 5 and the average first fall frost is October 10, giving a typical growing season of about 158 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 5
- Average first fall frost
- Oct 10
- Growing season
- 158 days
Safer after May 19 (1-in-10 risk)
Possible by Sep 28 (1-in-10 risk)
Last frost typically in 183 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 1 · May 16 · May 30 | Sep 19 · Oct 2 · Oct 14 | 138 days | 100% |
| Frost / freeze (32°F) | Apr 22 · May 5 · May 19 | Sep 28 · Oct 10 · Oct 29 | 158 days | 100% |
| Hard freeze (28°F) | Apr 8 · Apr 23 · May 8 | Oct 6 · Oct 24 · Nov 7 | 183 days | 100% |
Planting calendar for Port Jervis
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 4 – Jun 10 |
| Tomatoes | Transplant outdoors | May 21 – Jun 20 |
| Peppers | Start seeds indoors | Apr 4 – May 5 |
| Peppers | Transplant outdoors | Jun 4 – Jul 5 |
| Eggplant | Start seeds indoors | Apr 21 – May 20 |
| Eggplant | Transplant outdoors | Jun 4 – Jul 5 |
| Cucumbers | Sow outdoors | Jun 4 – Jun 30 |
| Summer squash | Sow outdoors | May 21 – Jul 5 |
| Winter squash & pumpkins | Sow outdoors | Jun 4 – Jul 5 |
| Snap beans | Sow outdoors | May 21 – Jul 23 |
| Sweet corn | Sow outdoors | May 21 – Jun 20 |
| Watermelon & cantaloupe | Sow outdoors | Jun 4 – Jul 5 |
| Okra | Sow outdoors | May 28 – Jun 20 |
| Peas | Sow outdoors (spring) | Apr 4 – May 20 |
| Potatoes | Plant outdoors (spring) | Apr 4 – Jun 4 |
| Onions | Start seeds indoors (spring) | Feb 21 – Mar 20 |
| Onions | Transplant outdoors (spring) | Apr 21 – May 20 |
| Broccoli | Start seeds indoors (spring) | Mar 17 – Apr 20 |
| Broccoli | Transplant outdoors (spring) | Apr 21 – May 20 |
| Broccoli | Start seeds indoors (fall) | Jun 10 – Jun 20 |
| Broccoli | Transplant outdoors (fall) | Jul 10 – Jul 21 |
| Cabbage | Start seeds indoors (spring) | Mar 7 – Apr 4 |
| Cabbage | Transplant outdoors (spring) | Apr 4 – May 5 |
| Cabbage | Start seeds indoors (fall) | May 31 – Jun 30 |
| Cabbage | Transplant outdoors (fall) | Jun 30 – Jul 31 |
| Leaf lettuce | Sow outdoors (spring) | Apr 4 – Jun 20 |
| Leaf lettuce | Sow outdoors (fall) | Jun 30 – Aug 16 |
| Spinach | Sow outdoors (spring) | Mar 28 – May 11 |
| Spinach | Sow outdoors (fall) | Jul 17 – Aug 21 |
| Radishes | Sow outdoors (spring) | Apr 4 – May 25 |
| Radishes | Sow outdoors (fall) | Jun 30 – Aug 31 |
| Kale | Sow outdoors (spring) | Apr 21 – May 11 |
| Kale | Sow outdoors (fall) | Jun 23 – Jul 31 |
| Carrots | Sow outdoors (spring) | May 5 – Jun 20 |
| Carrots | Sow outdoors (fall) | May 31 – Jul 16 |
| Garlic | Plant outdoors (fall) | Sep 30 – Oct 31 |
Where these dates come from
ZIP code 12771 is matched to the NOAA station Port Jervis, NY, 2.1 km away, at 580 ft elevation (154 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Port Jervis, NY (used) | 580 ft | May 5 | Oct 10 |
| Matamoras, PA | 459 ft | May 2 | Oct 12 |
| Sussex 8 Nnw, NJ | 1,020 ft | Apr 20 | Oct 20 |
| Sussex 3 Wnw, NJ | 667 ft | Apr 30 | Oct 11 |
Frost dates near Port Jervis
- Matamoras, PA 18336 · last May 5, first Oct 10
- Huguenot, NY 12746 · last May 5, first Oct 10
- Millrift, PA 18340 · last May 5, first Oct 10
- Sparrow Bush, NY 12780 · last May 5, first Oct 10
- Montague, NJ 07827 · last Apr 30, first Oct 11
- Westtown, NY 10998 · last May 5, first Oct 10
- Unionville, NY 10988 · last May 5, first Oct 10
- Cuddebackville, NY 12729 · last Apr 21, first Oct 22
Frequently asked questions
- When is the last frost in Port Jervis, NY?
- For ZIP code 12771, the average last spring frost (32°F) is May 5, based on NOAA 1991-2020 climate normals for the Port Jervis, NY weather station. There is a 1-in-10 chance of a frost after May 19.
- When is the first frost in Port Jervis, NY?
- The average first fall frost (32°F) is October 10. There is a 1-in-10 chance of frost by September 28, so tender plants are at risk from that point on.
- How long is the growing season in 12771?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 158 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.