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Will it freeze in Winooski in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Mon, Nov 9: 32°F (Mon, Nov 9, 6:00 PM EST to Tue, Nov 10, 6:00 AM EST).
Tonight: forecast low 51°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 51°F Above 36°F · Chance Rain Showers then Mostly Cloudy
- Fri, Nov 6 44°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 38°F Above 36°F · Rain Showers Likely
- Sun, Nov 8 34°F Frost possible · Chance Rain Showers
- Mon, Nov 9 32°F Freeze · Slight Chance Rain Showers
- Tue, Nov 10 32°F Freeze · Chance Rain Showers then Slight Chance Rain And Snow 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 Winooski
The median first fall hard-freeze date (28°F) is October 28, from NOAA’s 1991–2020 Climate Normals at Burlington 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 | Apr 27 · May 8 · May 23 | Sep 23 · Oct 4 · Oct 19 | 147 days |
| 32°F freeze | Apr 17 · Apr 29 · May 11 | Oct 2 · Oct 15 · Nov 1 | 169 days |
| 28°F hard freeze | Apr 5 · Apr 18 · Apr 30 | Oct 12 · Oct 28 · Nov 12 | 193 days |
Average high temperature by month
1991–2020 normals at Burlington 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 Winooski, VT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Burlington Intl Airport (station USW00014742, elevation 330 ft), 2.5 mi from Winooski. 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 Winooski
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Burlington, VT | 2.5 mi | Apr 29 | Oct 15 |
| Essex Junction, VT | 3.7 mi | May 2 | Oct 11 |
| South Burlington, VT | 4.3 mi | Apr 29 | Oct 15 |
| Plattsburgh, NY | 19 mi | May 6 | Oct 5 |
| St. Albans, VT | 22 mi | May 1 | Oct 12 |
| Montpelier, VT | 34 mi | May 5 | Oct 9 |
| Barre, VT | 39 mi | May 16 | Sep 29 |
| Malone, NY | 60 mi | May 6 | Oct 4 |
| Rutland, VT | 62 mi | May 15 | Sep 27 |
| Lebanon, NH | 75 mi | May 9 | Oct 6 |
Frequently asked questions
When is the last frost in Winooski?
On average, the last spring frost (32°F) in Winooski is around April 29. In about 1 year in 10 it comes after May 11, and in 9 years in 10 it comes after April 17.
When is the first frost in Winooski?
The first fall frost (32°F) usually arrives around October 15. There’s a 10% chance of a freeze by October 2 and a 90% chance by November 1.
Can it frost in Winooski 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 8.
What growing zone is Winooski?
Winooski 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 05404. See growing zones in Vermont.
More: all Vermont frost dates · Vermont growing zones · frost vs. freeze