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Will it freeze in Lebanon in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Mon, Nov 9: 31°F (Mon, Nov 9, 6:00 PM EST to Tue, Nov 10, 6:00 AM EST).
Tonight: forecast low 54°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 54°F Above 36°F · Chance Light Rain
- Fri, Nov 6 50°F Above 36°F · Chance Light Rain
- Sat, Nov 7 41°F Above 36°F · Light Rain Likely
- Sun, Nov 8 35°F Frost possible · Chance Light Rain
- Mon, Nov 9 31°F Freeze · Partly Cloudy
- Tue, Nov 10 32°F Freeze · Partly Cloudy
- Wed, Nov 11 26°F Hard freeze · 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 Lebanon
The median first fall hard-freeze date (28°F) is October 15, from NOAA’s 1991–2020 Climate Normals at Lebanon Municipal 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 7 · May 22 · Jun 6 | Sep 12 · Sep 26 · Oct 7 | 125 days |
| 32°F freeze | Apr 27 · May 9 · May 24 | Sep 23 · Oct 6 · Oct 19 | 148 days |
| 28°F hard freeze | Apr 17 · Apr 29 · May 11 | Oct 3 · Oct 15 · Nov 1 | 170 days |
Average high temperature by month
1991–2020 normals at Lebanon Municipal 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 Lebanon, NH come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Lebanon Municipal Airport (station USW00094765, elevation 598 ft), 2.6 mi from Lebanon. 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 Lebanon
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Claremont, NH | 17 mi | May 14 | Oct 1 |
| Franklin, NH | 32 mi | May 7 | Oct 3 |
| Rutland, VT | 36 mi | May 15 | Sep 27 |
| Laconia, NH | 39 mi | Apr 30 | Oct 18 |
| Barre, VT | 41 mi | May 16 | Sep 29 |
| Concord, NH | 45 mi | May 8 | Oct 3 |
| Montpelier, VT | 47 mi | May 5 | Oct 9 |
| Keene, NH | 47 mi | May 14 | Oct 1 |
| Manchester, NH | 61 mi | Apr 30 | Oct 11 |
| Rochester, NH | 68 mi | Apr 30 | Oct 9 |
Frequently asked questions
When is the last frost in Lebanon?
On average, the last spring frost (32°F) in Lebanon is around May 9. In about 1 year in 10 it comes after May 24, and in 9 years in 10 it comes after April 27.
When is the first frost in Lebanon?
The first fall frost (32°F) usually arrives around October 6. There’s a 10% chance of a freeze by September 23 and a 90% chance by October 19.
Can it frost in Lebanon 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 22.
What growing zone is Lebanon?
Lebanon 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 03766. See growing zones in New Hampshire.
More: all New Hampshire frost dates · New Hampshire growing zones · frost vs. freeze