Frost dates 2026–2027

Frost dates for Montpelier, Vermont

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Montpelier 2, 1.6 mi away (close match).

Last spring frostMay 5
First fall frostOct 9
157 frost-free days
Last spring frostMay 51 year in 10 after May 21
First fall frostOct 91 year in 10 by Sep 28
Growing season157 daysbetween median 32°F dates
Hardiness zoneZone 5a−20 to −15°F average extreme low

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Will it freeze in Montpelier in the next 7 nights?

The earliest overnight low at or below 32°F in the available NWS frost forecast is Sun, Nov 8: 32°F (Sun, Nov 8, 6:00 PM EST to Mon, Nov 9, 6:00 AM EST).

Tonight: forecast low 50°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.

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 Montpelier

The median first fall hard-freeze date (28°F) is October 21, from NOAA’s 1991–2020 Climate Normals at Montpelier 2. This is the 50% probability date, not a forecast for this year.

TemperatureLast 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 3 · May 18 · May 31 Sep 17 · Oct 1 · Oct 13 134 days
32°F freeze Apr 23 · May 5 · May 21 Sep 28 · Oct 9 · Oct 24 157 days
28°F hard freeze Apr 12 · Apr 24 · May 8 Oct 6 · Oct 21 · Nov 6 178 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00435273. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Montpelier 2

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 Montpelier, VT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Montpelier 2 (station USC00435273, elevation 530 ft), 1.6 mi from Montpelier. 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 Montpelier

CityDistanceLast spring frostFirst fall frost
Barre, VT 5.6 mi May 16 Sep 29
Essex Junction, VT 31 mi May 2 Oct 11
South Burlington, VT 32 mi Apr 29 Oct 15
Winooski, VT 34 mi Apr 29 Oct 15
Burlington, VT 37 mi Apr 29 Oct 15
St. Albans, VT 45 mi May 1 Oct 12
Lebanon, NH 47 mi May 9 Oct 6
Rutland, VT 50 mi May 15 Sep 27
Plattsburgh, NY 53 mi May 6 Oct 5
Claremont, NH 62 mi May 14 Oct 1

Frequently asked questions

When is the last frost in Montpelier?

On average, the last spring frost (32°F) in Montpelier is around May 5. In about 1 year in 10 it comes after May 21, and in 9 years in 10 it comes after April 23.

When is the first frost in Montpelier?

The first fall frost (32°F) usually arrives around October 9. There’s a 10% chance of a freeze by September 28 and a 90% chance by October 24.

Can it frost in Montpelier 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 18.

What growing zone is Montpelier?

Montpelier 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 05602. See growing zones in Vermont.

More: all Vermont frost dates · Vermont growing zones · frost vs. freeze