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Will it freeze in Plattsburgh in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Wed, Nov 11: 27°F (Wed, Nov 11, 6:00 PM EST to Thu, Nov 12, 6:00 AM EST).
Tonight: forecast low 49°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 49°F Above 36°F · Chance Rain Showers then Mostly Cloudy
- Fri, Nov 6 43°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 38°F Above 36°F · Rain Showers Likely
- Sun, Nov 8 35°F Frost possible · Chance Rain Showers
- Mon, Nov 9 34°F Frost possible · Partly Cloudy
- Tue, Nov 10 33°F Frost possible · Slight Chance Rain Showers
- Wed, Nov 11 27°F Hard freeze · Mostly 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 Plattsburgh
The median first fall hard-freeze date (28°F) is October 19, from NOAA’s 1991–2020 Climate Normals at Plattsburgh Intl 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 | May 5 · May 19 · Jun 3 | Sep 13 · Sep 24 · Oct 7 | 127 days |
| 32°F freeze | Apr 24 · May 6 · May 19 | Sep 23 · Oct 5 · Oct 22 | 152 days |
| 28°F hard freeze | Apr 12 · Apr 25 · May 8 | Oct 3 · Oct 19 · Nov 3 | 177 days |
Average high temperature by month
1991–2020 normals at Plattsburgh Intl 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 Plattsburgh, NY come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Plattsburgh Intl Airport (station USW00064776, elevation 234 ft), 2.9 mi from Plattsburgh. 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 Plattsburgh
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Burlington, VT | 17 mi | Apr 29 | Oct 15 |
| Winooski, VT | 19 mi | Apr 29 | Oct 15 |
| St. Albans, VT | 20 mi | May 1 | Oct 12 |
| Essex Junction, VT | 22 mi | May 2 | Oct 11 |
| South Burlington, VT | 22 mi | Apr 29 | Oct 15 |
| Malone, NY | 42 mi | May 6 | Oct 4 |
| Montpelier, VT | 53 mi | May 5 | Oct 9 |
| Barre, VT | 58 mi | May 16 | Sep 29 |
| Massena, NY | 72 mi | May 8 | Oct 1 |
| Potsdam, NY | 75 mi | May 5 | Oct 8 |
Frequently asked questions
When is the last frost in Plattsburgh?
On average, the last spring frost (32°F) in Plattsburgh is around May 6. In about 1 year in 10 it comes after May 19, and in 9 years in 10 it comes after April 24.
When is the first frost in Plattsburgh?
The first fall frost (32°F) usually arrives around October 5. There’s a 10% chance of a freeze by September 23 and a 90% chance by October 22.
Can it frost in Plattsburgh 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 May 19.
What growing zone is Plattsburgh?
Plattsburgh is in USDA Plant Hardiness Zone 5a (average annual extreme minimum temperature −20 to −15°F), based on the 2023 USDA map for ZIP code 12901. See growing zones in New York.
More: all New York frost dates · New York growing zones · frost vs. freeze