Checking current alerts… View NWS forecast and alerts.
Will it freeze in Port Chester in the next 7 nights?
No overnight lows at or below 32°F are forecast in Port Chester during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 61°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 61°F Above 36°F · Light Rain Likely then Patchy Fog
- Fri, Nov 6 52°F Above 36°F · Light Rain
- Sat, Nov 7 45°F Above 36°F · Slight Chance Light Rain
- Sun, Nov 8 41°F Above 36°F · Mostly Clear
- Mon, Nov 9 40°F Above 36°F · Mostly Clear
- Tue, Nov 10 41°F Above 36°F · Mostly Clear
- Wed, Nov 11 37°F Above 36°F · Partly Cloudy
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Port Chester
The median first fall hard-freeze date (28°F) is November 13, from NOAA’s 1991–2020 Climate Normals at Westchester County Airport. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Apr 13 · Apr 26 · May 11 | Oct 2 · Oct 18 · Nov 2 | 174 days |
| 32°F freeze | Apr 1 · Apr 12 · Apr 27 | Oct 15 · Oct 31 · Nov 14 | 200 days |
| 28°F hard freeze | Mar 18 · Apr 1 · Apr 13 | Oct 29 · Nov 13 · Nov 29 | 224 days |
Average high temperature by month
1991–2020 normals at Westchester County Airport
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Port Chester, NY come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Westchester County Airport (station USW00094745, elevation 379 ft), 4.8 mi from Port Chester. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Port Chester
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Rye Brook, NY | 1.9 mi | Apr 12 | Oct 31 |
| Harrison, NY | 3.1 mi | Apr 12 | Oct 31 |
| Rye, NY | 4.3 mi | Apr 12 | Oct 31 |
| White Plains, NY | 4.3 mi | Apr 12 | Oct 31 |
| Mamaroneck, NY | 5.6 mi | Apr 20 | Oct 26 |
| Scarsdale, NY | 5.6 mi | Apr 20 | Oct 26 |
| Larchmont, NY | 6.8 mi | Apr 20 | Oct 26 |
| New Rochelle, NY | 8.1 mi | Apr 20 | Oct 26 |
| Stamford, CT | 8.1 mi | Apr 17 | Oct 23 |
| Glen Cove, NY | 8.1 mi | Apr 2 | Nov 12 |
Frequently asked questions
When is the last frost in Port Chester?
On average, the last spring frost (32°F) in Port Chester is around April 12. In about 1 year in 10 it comes after April 27, and in 9 years in 10 it comes after April 1.
When is the first frost in Port Chester?
The first fall frost (32°F) usually arrives around October 31. There’s a 10% chance of a freeze by October 15 and a 90% chance by November 14.
Can it frost in Port Chester after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after April 26.
What growing zone is Port Chester?
Port Chester is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 10573. See growing zones in New York.
More: all New York frost dates · New York growing zones · UV index today in Port Chester · frost vs. freeze