Frost dates / New York / New Rochelle
Frost dates in New Rochelle, NY
The station on this page is DOBBS FERRY-ARDSLEY, NY US (USC00302129), 6.5 miles from the city point. Population in the Census 2024 estimate is 85,512.
Zone 7bUSDA average annual extreme minimum 5°F to 10°F, from ZIP 10801 (0.5 miles from the city point used on this page).
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
Last 32°F in spring
NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.
| Probability | Date | How to read it |
|---|---|---|
| 90% | April 4 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 20 | Median. |
| 10% | May 6 | Later date. A last 32°F on or after this day is uncommon. |
First 32°F in fall
NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.
| Probability | Date | How to read it |
|---|---|---|
| 10% | October 10 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | October 26 | Median. |
| 90% | November 10 | Later date. A first 32°F on or before this day is common. |
32°F growing-season length
Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.
| Probability the season is at least this long | Days |
|---|---|
| 10% | 210 |
| 50% | 189 |
| 90% | 168 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 20 | April 4 | March 20 |
| First, on or before | October 23 | November 7 | November 23 |
| Season at least | 238 days | 217 days | 197 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 18 | May 2 | April 19 |
| First, on or before | October 1 | October 12 | October 31 |
| Season at least | 185 days | 164 days | 146 days |
Station DOBBS FERRY-ARDSLEY, NY US (USC00302129). Completeness flag R, 20 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 61 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.
Planting calendar for New Rochelle · Zone 7b
Check a crop against this station
New Rochelle, NY
Zone 7bAverage annual extreme minimum 5°F to 10°F
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
New York. Nearest qualified station: DOBBS FERRY-ARDSLEY, NY US (USC00302129), 6.5 miles. Median last 32°F April 20. Median first 32°F October 26. The 50% growing-season length is 189 days.
Open the ZIP page · Crop guides for New York
32°F probabilities at this station
| 10% | 50% | 90% | |
|---|---|---|---|
| Last 32°F on or after | May 6 | April 20 | April 4 |
| First 32°F on or before | October 10 | October 26 | November 10 |
Column order matches the NCEI file: for the last freeze, 10% is the later date and 90% is the earlier date. How to read the probabilities.
Planting calendar
Windows below are from Cornell University, Cornell Vegetables, Vegetable planting dates for Upstate New York, retrieved 2026-10-10. It’s based on areas with last spring frost around May 20 and first fall frost around October 1. Dates below are the outdoor ranges printed in that table, not a conversion into weeks before frost.
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