Frost dates / New York / Rochester
Frost dates in Rochester, NY
The station on this page is ROCHESTER GTR INTL AP, NY US (USW00014768), 4.8 miles from the city point. Population in the Census 2024 estimate is 207,282.
Zone 6bUSDA average annual extreme minimum -5°F to 0°F, from ZIP 14605 (0.8 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 12 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 24 | Median. |
| 10% | May 8 | 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 8 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | October 25 | Median. |
| 90% | November 7 | 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% | 201 |
| 50% | 181 |
| 90% | 162 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 26 | April 14 | April 1 |
| First, on or before | October 25 | November 6 | November 21 |
| Season at least | 228 days | 207 days | 186 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 19 | May 4 | April 23 |
| First, on or before | September 28 | October 11 | October 27 |
| Season at least | 176 days | 158 days | 139 days |
Station ROCHESTER GTR INTL AP, NY US (USW00014768). Completeness flag S, 25 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 162.5 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 Rochester · Zone 6b
Check a crop against this station
Rochester, NY
Zone 6bAverage annual extreme minimum -5°F to 0°F
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
New York. Nearest qualified station: ROCHESTER GTR INTL AP, NY US (USW00014768), 4.8 miles. Median last 32°F April 24. Median first 32°F October 25. The 50% growing-season length is 181 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 8 | April 24 | April 12 |
| First 32°F on or before | October 8 | October 25 | November 7 |
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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