Frost dates for 13697Winthrop, NY
The average last spring frost in Winthrop is May 10 and the average first fall frost is October 5, giving a typical growing season of about 148 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 10
- Average first fall frost
- Oct 5
- Growing season
- 148 days
Safer after May 25 (1-in-10 risk)
Possible by Sep 17 (1-in-10 risk)
Last frost typically in 188 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 7 · May 20 · Jun 3 | Sep 8 · Sep 23 · Oct 8 | 124 days | 100% |
| Frost / freeze (32°F) | Apr 25 · May 10 · May 25 | Sep 17 · Oct 5 · Oct 22 | 148 days | 100% |
| Hard freeze (28°F) | Apr 16 · Apr 30 · May 15 | Oct 1 · Oct 16 · Nov 4 | 169 days | 100% |
Planting calendar for Winthrop
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 9 – Jun 15 |
| Tomatoes | Transplant outdoors | May 26 – Jun 15 |
| Peppers | Start seeds indoors | Apr 9 – May 10 |
| Peppers | Transplant outdoors | Jun 9 – Jul 10 |
| Eggplant | Start seeds indoors | Apr 26 – May 25 |
| Eggplant | Transplant outdoors | Jun 9 – Jul 10 |
| Cucumbers | Sow outdoors | Jun 9 – Jun 25 |
| Summer squash | Sow outdoors | May 26 – Jul 10 |
| Winter squash & pumpkins | Sow outdoors | Jun 9 – Jul 10 |
| Snap beans | Sow outdoors | May 26 – Jul 18 |
| Sweet corn | Sow outdoors | May 26 – Jun 15 |
| Watermelon & cantaloupe | Sow outdoors | Jun 9 – Jul 10 |
| Okra | Sow outdoors | Jun 2 – Jun 25 |
| Peas | Sow outdoors (spring) | Apr 9 – May 25 |
| Potatoes | Plant outdoors (spring) | Apr 9 – Jun 9 |
| Onions | Start seeds indoors (spring) | Feb 26 – Mar 25 |
| Onions | Transplant outdoors (spring) | Apr 26 – May 25 |
| Broccoli | Start seeds indoors (spring) | Mar 22 – Apr 25 |
| Broccoli | Transplant outdoors (spring) | Apr 26 – May 25 |
| Broccoli | Start seeds indoors (fall) | Jun 5 – Jun 15 |
| Broccoli | Transplant outdoors (fall) | Jul 5 – Jul 16 |
| Cabbage | Start seeds indoors (spring) | Mar 12 – Apr 9 |
| Cabbage | Transplant outdoors (spring) | Apr 9 – May 10 |
| Cabbage | Start seeds indoors (fall) | May 26 – Jun 25 |
| Cabbage | Transplant outdoors (fall) | Jun 25 – Jul 26 |
| Leaf lettuce | Sow outdoors (spring) | Apr 9 – Jun 25 |
| Leaf lettuce | Sow outdoors (fall) | Jun 25 – Aug 11 |
| Spinach | Sow outdoors (spring) | Apr 2 – May 16 |
| Spinach | Sow outdoors (fall) | Jul 12 – Aug 16 |
| Radishes | Sow outdoors (spring) | Apr 9 – May 30 |
| Radishes | Sow outdoors (fall) | Jun 25 – Aug 26 |
| Kale | Sow outdoors (spring) | Apr 26 – May 16 |
| Kale | Sow outdoors (fall) | Jun 18 – Jul 26 |
| Carrots | Sow outdoors (spring) | May 10 – Jun 25 |
| Carrots | Sow outdoors (fall) | May 26 – Jul 11 |
| Garlic | Plant outdoors (fall) | Sep 25 – Oct 26 |
Where these dates come from
ZIP code 13697 is matched to the NOAA station Lawrenceville 3 Sw, NY, 10.8 km away, at 466 ft elevation (131 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Lawrenceville 3 Sw, NY (used) | 466 ft | May 10 | Oct 5 |
| Massena Intl Ap, NY | 214 ft | May 8 | Oct 1 |
| Colton 2 N, NY | 580 ft | May 5 | Oct 8 |
| Canton 4 Se, NY | 448 ft | May 9 | Sep 30 |
Frost dates near Winthrop
- West Stockholm, NY 13696 · last May 10, first Oct 5
- Brasher Falls, NY 13613 · last May 8, first Oct 1
- North Lawrence, NY 12967 · last May 10, first Oct 5
- Lawrenceville, NY 12949 · last May 10, first Oct 5
- Nicholville, NY 12965 · last May 10, first Oct 5
- Norfolk, NY 13667 · last May 8, first Oct 1
- Norwood, NY 13668 · last May 9, first Sep 30
- Raymondville, NY 13678 · last May 8, first Oct 1
Frequently asked questions
- When is the last frost in Winthrop, NY?
- For ZIP code 13697, the average last spring frost (32°F) is May 10, based on NOAA 1991-2020 climate normals for the Lawrenceville 3 Sw, NY weather station. There is a 1-in-10 chance of a frost after May 25.
- When is the first frost in Winthrop, NY?
- The average first fall frost (32°F) is October 5. There is a 1-in-10 chance of frost by September 17, so tender plants are at risk from that point on.
- How long is the growing season in 13697?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 148 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.