Frost dates for 10702Yonkers, NY
The average last spring frost in Yonkers is April 20 and the average first fall frost is October 26, giving a typical growing season of about 189 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 20
- Average first fall frost
- Oct 26
- Growing season
- 189 days
Safer after May 6 (1-in-10 risk)
Possible by Oct 10 (1-in-10 risk)
Last frost typically in 168 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 19 · May 2 · May 18 | Oct 1 · Oct 12 · Oct 31 | 164 days | 100% |
| Frost / freeze (32°F) | Apr 4 · Apr 20 · May 6 | Oct 10 · Oct 26 · Nov 10 | 189 days | 100% |
| Hard freeze (28°F) | Mar 20 · Apr 4 · Apr 20 | Oct 23 · Nov 7 · Nov 23 | 217 days | 100% |
Planting calendar for Yonkers
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 20 – May 26 |
| Tomatoes | Transplant outdoors | May 6 – Jul 6 |
| Peppers | Start seeds indoors | Mar 20 – Apr 20 |
| Peppers | Transplant outdoors | May 20 – Jun 20 |
| Eggplant | Start seeds indoors | Apr 6 – May 5 |
| Eggplant | Transplant outdoors | May 20 – Jun 20 |
| Cucumbers | Sow outdoors | May 20 – Jul 16 |
| Summer squash | Sow outdoors | May 6 – Jun 20 |
| Winter squash & pumpkins | Sow outdoors | May 20 – Jun 20 |
| Snap beans | Sow outdoors | May 6 – Aug 8 |
| Sweet corn | Sow outdoors | May 6 – Jul 6 |
| Watermelon & cantaloupe | Sow outdoors | May 20 – Jun 20 |
| Okra | Sow outdoors | May 13 – Jun 5 |
| Peas | Sow outdoors (spring) | Mar 20 – May 5 |
| Potatoes | Plant outdoors (spring) | Mar 20 – May 20 |
| Onions | Start seeds indoors (spring) | Feb 6 – Mar 5 |
| Onions | Transplant outdoors (spring) | Apr 6 – May 5 |
| Broccoli | Start seeds indoors (spring) | Mar 2 – Apr 5 |
| Broccoli | Transplant outdoors (spring) | Apr 6 – May 5 |
| Broccoli | Start seeds indoors (fall) | Jun 26 – Jul 6 |
| Broccoli | Transplant outdoors (fall) | Jul 26 – Aug 6 |
| Cabbage | Start seeds indoors (spring) | Feb 20 – Mar 20 |
| Cabbage | Transplant outdoors (spring) | Mar 20 – Apr 20 |
| Cabbage | Start seeds indoors (fall) | Jun 16 – Jul 16 |
| Cabbage | Transplant outdoors (fall) | Jul 16 – Aug 16 |
| Leaf lettuce | Sow outdoors (spring) | Mar 20 – Jun 5 |
| Leaf lettuce | Sow outdoors (fall) | Jul 16 – Sep 1 |
| Spinach | Sow outdoors (spring) | Mar 13 – Apr 26 |
| Spinach | Sow outdoors (fall) | Aug 2 – Sep 6 |
| Radishes | Sow outdoors (spring) | Mar 20 – May 10 |
| Radishes | Sow outdoors (fall) | Jul 16 – Sep 16 |
| Kale | Sow outdoors (spring) | Apr 6 – Apr 26 |
| Kale | Sow outdoors (fall) | Jul 9 – Aug 16 |
| Carrots | Sow outdoors (spring) | Apr 20 – Jun 5 |
| Carrots | Sow outdoors (fall) | Jun 16 – Aug 1 |
| Garlic | Plant outdoors (fall) | Oct 16 – Nov 16 |
Where these dates come from
ZIP code 10702 is matched to the NOAA station Dobbs Ferry-Ardsley, NY, 10 km away, at 200 ft elevation (115 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Dobbs Ferry-Ardsley, NY (used) | 200 ft | Apr 20 | Oct 26 |
| Bronx, NY | 39 ft | Apr 1 | Nov 16 |
| Teterboro Ap, NJ | 9 ft | Apr 3 | Nov 4 |
| New York Laguardia Ap, NY | 11 ft | Mar 26 | Nov 25 |
Frost dates near Yonkers
- Yonkers, NY 10705 · last Apr 20, first Oct 26
- Bronx, NY 10471 · last Apr 20, first Oct 26
- Alpine, NJ 07620 · last Apr 20, first Oct 26
- Bronxville, NY 10708 · last Apr 20, first Oct 26
- Mount Vernon, NY 10551 · last Apr 20, first Oct 26
- Cresskill, NJ 07626 · last Apr 3, first Nov 4
- Tenafly, NJ 07670 · last Apr 3, first Nov 4
- Demarest, NJ 07627 · last Apr 3, first Nov 4
Frequently asked questions
- When is the last frost in Yonkers, NY?
- For ZIP code 10702, the average last spring frost (32°F) is April 20, based on NOAA 1991-2020 climate normals for the Dobbs Ferry-Ardsley, NY weather station. There is a 1-in-10 chance of a frost after May 6.
- When is the first frost in Yonkers, NY?
- The average first fall frost (32°F) is October 26. There is a 1-in-10 chance of frost by October 10, so tender plants are at risk from that point on.
- How long is the growing season in 10702?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 189 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.